Page 1 TECHNICAL & SERVICE MANUAL Gas Heat Pump Air Conditioner July 2012 TROUBLESHOOTING Applicable Models : 2WAY Multi : 2WAY W Multi : 3WAY Multi Reference No. SM7110040-01...
Page 2 Applicable models < 2WAY MULTI / W MULTI > U-16GE2E5 U-16GEP2E5 U-20GE2E5 U-20GEP2E5 U-25GE2E5 U-25GEP2E5 U-30GE2E5 < 3WAY MULTI > U-16GF2E5 U-20GF2E5 U-25GF2E5...
Page 3: Table Of Contents
Table of Contents Symptoms that are not malfunctions ............... I–1 Before troubleshooting (W MULTI series) .............. II–1 W MULTI series system overview ..............II–1 About backup operation during maintenance work ........II–2 Malfunctions and Displays ..................III–1 Malfunctions without any display ..............III–1 Remote Controller alarm display ..............
Page 4 E07 Outdoor Unit Transmission Failure to Indoor Unit ........... IV–44 E08 Duplicated Indoor Unit Address Setting ..............IV–45 E09 Multiple Main Remote Controller Units Set ............. IV–46 E11 Indoor Unit Receive Failure from Signal Output Board (*) ........IV–47 E12 Automatic Address Setting Is in Progress : Automatic Address Setting Start is Prohibited (*)....
Page 5 P11 Water Heat Exchanger Unit Anti-icing Sensor Error (for only water heat exchanger unit) ............IV–88 P12 Indoor DC Fan Error (DC fan motor model only) ............ IV–89 P13 Refrigerant circuit Error (W MULTI)................ IV–90 P13 Refrigerant Circuit Error (3WAY) ................IV–91 P15 Complete Refrigerant Gas Depletion ..............
Page 6: Symptoms That Are Not Malfunctions
1. Symptoms that are not malfunctions The following symptoms are characteristic operating conditions of this system and do not indicate malfunctions: The fan ﬂ aps on the indoor unit operate when the unit is stopped If the compressor outlet pressure exceeds 3.5 MPa during heating operation, the ﬂ aps on the stopped unit move to horizontal and the fan rotates in the breeze.
Page 7: Before Troubleshooting (W Multi Series
2. Before troubleshooting (W MULTI series) (1) W MULTI series system overview W MULTI series is a system that can join up to two outdoor units to the same refrigerant tube, and control each outdoor unit while performing air conditioning according to the operation load of the indoor unit. Figure 1 gives an overview of the system.
Page 8: About Backup Operation During Maintenance Work
(2) About backup operation during maintenance work ● What is backup operation? In the W MULTI series, multiple outdoor units are connected to the same refrigerant tube as shown in Figure 1. Therefore, even during maintenance work of an outdoor unit, the other outdoor unit not required in maintenance work can be used to keep the indoor operating conditions.
Page 9 [Work example] Perform maintenance on W MULTI outdoor unit 2 in refrigerant system 1 in Figure 1. a) For the W MULTI outdoor unit 2 indicated in the left diagram, perform Refrigerant System 1 Refrigerant System 1 <<Step 1>> to <<Step 3>> in [Backup operation procedure] in that order. Then, perform maintenance work on W MULTI outdoor unit 2.
Page 10: Malfunctions And Displays
3. Malfunctions and Displays (1) Malfunctions without any display The circuit breaker trips when power is turned on ● Short circuit or ground fault of the crankcase heater, current leakage in electrical parts Circuit breaker trips when operated ● Current leakage or short circuit in fan or coolant pump, current leakage or short circuit in electrical parts Poor cooling 1) Problem in refrigeration circuit ●...
Page 11: Remote Controller Alarm Display
(2) Remote Controller alarm display : Flashing : Lit : Off Warning Wireless Remote Control Device Detection Item Display Lamp Display Checked Engine oil pressure error Engine oil error Engine high-revolution error Engine low-revolution error Ignition power source error Engine start failure Fuel gas valve error Engine system error Engine stall...
Page 12 : Flashing : Lit : Off Warning Wireless Remote Control Device Detection Item Display Lamp Display Checked Indoor heat exchanger inlet temperature Wait... Operating Timer sensor error (E1) Indoor heat exchanger outlet temperature Indoor unit sensor error (E3) Indoor unit sensor errors Indoor unit intake temperature sensor Alternate ﬂashing...
Page 13 : Flashing : Lit : Off Warning Wireless Remote Control Device Detection Item Display Lamp Display Checked Indoor unit ceiling panel connector connection failure Operating Timer Wait... Indoor fan error / indoor fan rpm error Indoor unit Indoor protection Indoor unit ﬂ oat switch operation devices Indoor DC fan error Alternate ﬂashing...
Page 14: Error Display And Troubleshooting
4. Error Display and Troubleshooting The description of each error display begins on a new page. Descriptions of some troubleshooting procedures span several pages. When you refer to an error display, be sure to ﬁ rst check whether the description of the troubleshooting procedure spans several pages.
Page 15: Troubleshooting
(4) Troubleshooting A01 Engine Oil Pressure Error Error detection method • When the engine oil pressure switch is OFF continuously for 4 seconds during engine operations (complete combustion,) the engine will be shut down momentarily and an error ﬂ ag set. The reason for the engine being shut down is due to the error ﬂ...
Page 16 • 2 -1 Engine oil pressure switch • 3-1 With oil pressure: DC0V No oil pressure: DC12V IV–3...
Page 17: A02 Engine Oil Error
A02 Engine Oil Error This function is used to advise the user that the time for changing the engine oil has arrived (or is close.) It is not a function for detecting and displaying equipment malfunctions (or suspected malfunctions) in the same way as normal error detection.
Page 18: A03 Engine High-Revolution Error
A03 Engine High-Revolution Error Error detection method Engine revolution speed is, 45.0 ~ 71.0 kw models • Engine revolution speed is more than 2,300min continuously for 30 seconds • Engine revolution speed is more than 2,400min continuously for 10 seconds •...
Page 19: A04 Engine Low-Revolution Error
A04 Engine Low-Revolution Error Error detection method • When engine revolution speed drops to 700min or less continuously for 3 seconds during engine operation (complete combustion), an abnormal ﬂ ag is set and the engine stops. An Engine Speed Too Low condition is assumed when the error ﬂ...
Page 20: A05 Ignition Source Error
A05 Ignition Source Error Error detection method When the starter power output meets the following conditions, an error is detected upon 5 consecutive occurrences in one hour. • When an ignition voltage decrease is detected for 2.5 seconds or more. •...
Page 21 Yes 3-5 Is approximately AC200V applied between the magnet switch’s No. 2 and No. 6 when the magnet switch is turned on? Are there any defective wiring connections/contacts or severed wires between the magnet switch and the starter power source’s relay connector 2P-6 (white?) → Repair wiring Yes 3-7 Is approximately AC200V being applied between the magnet switch Check primary...
Page 22: A06 Engine Start Failure
A06 Engine Start Failure Error detection method When the engine will not start despite cranking being carried out 30 times (revolution speed detected) during engine start-up (cranking = 5 seconds ON, 10 seconds OFF.) * Enforced pauses of 3 minutes every 5 cranks and 10 minutes every 15 cranks are in effect. Troubleshooting Has the fuel gas pressure dropped? Is the fuel empty? Measure the Engine...
Page 23 Yes 6-5 Is 200V AC being applied between the ﬁ lter board connector 3P Replace the ﬁ lter (white) CN003 No. 1 to No. 3? board Are there any poor connections, contacts or severed wires between Yes Repair Wiring the outdoor unit’s power board connector 3P (white) CN002 and the ﬁ...
Page 24: A07 Fuel Gas Valve Error
A07 Fuel Gas Valve Error Error detection method • An error ﬂ ag is set when it is judged that the fuel gas valves did not close when engine operations were halted (excluding when halted owing to malfunctions) and an error will be triggered when this occurs ﬁ ve consecutive times.
Page 25: A08 Engine Stall
A08 Engine Stall Error detection method During engine operation (complete combustion), when engine revolution speed ≤ 100min continuously for 3 seconds, the engine is stopped momentarily and an error ﬂ ag is set. An Engine Stall condition is assumed when the error ﬂ ag has stopped the engine 5 consecutive times in 1 hour. Troubleshooting 1-1 Has the fuel gas pressure dropped? Is the fuel empty? Fuel...
Page 26: A10 Exhaust Gas Temperature High
A10 Exhaust Gas Temperature High Error detection method During engine operation (complete combustion), when the exhaust gas temperature ≥ 130°C continuously for 10 seconds, the engine is stopped momentarily and an error ﬂ ag is set. An Exhaust Gas Temp. High error is assumed when this ﬂ ag has shut down the engine once. Troubleshooting Yes 2-1 Exhaust gas...
Page 27: A14 Engine Oil Pressure Switch Error
A14 Engine Oil Pressure Switch Error Error detection method • When starting the engine, if the oil pressure switch is ON for 6 seconds or more (contact closed) before complete combustion, an error ﬂ ag is set. An abnormal stop results on the ﬁ rst occurrence. However, if turned OFF, the error ﬂ...
Page 28: A15 Starter Power Source Output Short Circuit
A15 Starter Power Source Output Short Circuit Error detection method When the starter power primary current meets the following conditions, an error is determined upon 5 consecutive occurrences in 1 hour. • Not during cranking: When 40A or more is detected for 0.1 second or more •...
Page 29: A16 Starter Lock
A16 Starter Lock Error detection method • During cranking, a Starter Locked error is assumed when any of the following conditions occur 5 times in 1 hour: the starter power primary current meets the following condition, no revolution pulse is detected, no input from the crank angle sensor, no input from the ?cam? angle sensor.
Page 30: A17 Ct Error (Starter Current Detection Failure
A17 CT Error (Starter Current Detection Failure) Error detection method When the starter power primary current meets the following conditions, an error is determined upon 5 occurrences in 1 hour. • During cranking: With no detection of starter current, and with revolution speed pulse detected, when 5 seconds pass during cranking or when engine attains complete combustion.
Page 31: A19 Low Coolant Temperature
A19 Low Coolant Temperature Error detection method • If the temperature of the coolant does not exceed 60°C during engine operations (complete combustion,) the engine will be momentarily halted. (The time varies between 30 to 60 minutes depending on the temperature.) An emergency shutdown will occur when the engine has been halted twice because of this error.
Page 32: A20 High Coolant Temperature
A20 High Coolant Temperature Error detection method When the coolant temperature ≥100°C continuously for 2 seconds or when the coolant temperature is ≥95°C for 3 consecutive seconds during engine operations (complete combustion,) the engine will be momentarily shut down and an error ﬂ ag set. The reason for the engine shutting down is because the error ﬂ...
Page 33 • 2-3 The air discharge hose must not be emitting large amounts of bubbles. Air bleed cock on the tube leading from the engine outlet (between the wax valve.) • 3-1 Resistance values of the coolant temperature sensor (see the chart on thermistor characteristics for further details.) 40°C: 1.2kΩ...
Page 34: A21 Coolant Level Error
A21 Coolant Level Error Error detection method • A ﬂ ag will be set if the possibility of air entering the coolant circuit is detected during air-mix conﬁ rmation operations prior to starting the engine (complete combustion.) (The engine will continue to operate.) An error will be triggered if this possibility is detected three consecutive times.
Page 35 • 2-1 Visually inspect all portions of the coolant system while stopped. Are there any coolant leaks, or evidence of coolant leaks? Also, are there any water leaks from any of the following four locations when the water circuit (*) is operated and the pump activated? * Water circuit operations: Performed with the [ ...
Page 36: A22 Coolant Pump Error
A22 Coolant Pump Error Error detection method Errors can be determined when coolant pump rotations and driving meet the following conditions. • When an error is triggered once owing to the coolant pump revolutions not increasing or not being able to be detected when the engine is started up.
Page 37: A23 Crankshaft Angle Sensor Error
A23 Crankshaft Angle Sensor Error A24 Camshaft Angle Sensor Error Error detection method When input from the sensor meets the following conditions, an error is determined upon 5 consecutive occurrences in 1 hour. • When starter current was detected during cranking, but crank angle sensor input is not detected for 2 continuous seconds.
Page 38: A25 Clutch Error
A25 Clutch Error Error detection method A Clutch Error fault is detected when clutch coil temperature or clutch 2 coil temperature is 110°C or more for up to 1 minute. Error is detected with one occurrence. Troubleshooting *The compressor uses a twin clutch speciﬁ cation. Inspect both clutch 1 and clutch 2. Rotate the compressor pulley by hand while stopped, to Yes Replace compressor Compressor...
Page 39: A26 Flameout Error
A26 Flameout Error Error detection method • An error is determined when the engine revolution speed ﬂ uctuates widely during engine operation. The engine is stopped and an error ﬂ ag is set. A ﬂ ameout error is assumed when this ﬂ ag has shut down the engine 5 consecutive times in 1 hour. Troubleshooting Yes 1-2 1-1 Are sparks emitted properly?
Page 40: A27 Catalyst Temperature Error (For Only Models With Catalyst Option
A27 Catalyst Temperature Error (for only models with catalyst option) Error detection method • When a catalyst temperature exceeding 700°C is detected continuously for 10 seconds during engine operation, the engine is stopped and an error ﬂ ag is set. A Catalyst Temp.
Page 41: A28 Generator Error (For Only High Power Multi
A28 Generator Error (for only High Power Multi) Error detection method A generator error may be assumed if an error occurs with the generator or the generator belt. • Phase interruptions occur owing to the generator wiring being severed. • A short-circuit has occurred between the generator wiring or inside the generator. •...
Page 42: A29 Converter Error (For Only High Power Multi
A29 Converter Error (for only High Power Multi) Error detection method Converter Error is assumed when an error occurs in the converter. • When wires are broken or short-circuit has occurred in converter elements. • When a converter circuit is damaged. •...
Page 43: E01 Remote Controller Receive Failure
E01 Remote Controller Receive Failure Error detection method 1) When the indoor unit is connected An error is determined when no incoming communication is received for 3 minutes. • When 9 or more indoor units are wired into the remote controller group. •...
Page 44 ● The designation (/) is used in the table to indicate indoor boards for DC and AC motor models. ● There is no TEST pin on the indoor board for AC motor models. ● See “5. Reference Document” for checking remote controller. ●...
Page 45 Request improvements Water heat to the power facility exchanger manager unit’s control 6-1 Is AC200V ±10% being applied between TB1 R and S? Proceed to 6-2 after board and checking the wires and surrounding terminals are normal area around TB1 Replace the varister (VA1) 6-2 Is the varister (VA1) grounded or severely deteriorated?
Page 46: E02 Remote Controller Transmission Failure
E02 Remote Controller Transmission Failure Error detection method When the remote controller (controller) itself cannot transmit. Or, when a self-transmitted signal cannot be selfreceived or changes, an error is determined. • Breakdown of remote controller itself Troubleshooting Yes 1-2 1-1 Is this indoor unit group-controlled? Remote controller Yes Repair wiring...
Page 47: E03 Indoor Unit Receive Failure From Remote Controller (Central
E03 Indoor Unit Receive Failure from Remote Controller (Central) Error detection method 1) With indoor unit connected An error is determined when no transmission is received from the remote controller (central) for 3 minutes, or when no transmission is received from the central equipment for 15 minutes. •...
Page 48 • 1-4 Central control, main/sub switch Central control, main/sub switch Main: OFF Main: OFF Sub: ON Sub: ON System Controller Multi-Controller IV–35...
Page 49 2) When the water heat exchanger unit is connected Yes 2-1 Remote 1-1 Is power being supplied to the remote controller? controller Switch on the power power Yes 2-2 2-1 Has an address been set on the remote controller? Remote Set the address controller Yes 2-3...
Page 50: E04 Indoor Unit Receive Failure From Outdoor Unit
E04 Indoor Unit Receive Failure from Outdoor Unit 1) When the indoor unit is connected Error detection method After turning power ON, with no transmission from outdoor unit for 3 minutes. Or, an error is determined when the outdoor unit does not respond. •...
Page 51 ● The designation (/) is used in the table to indicate indoor boards for DC and AC motor models. ● There is no TEST pin on the indoor board for AC motor models. ● For board and Electrical Wiring Diagram, see Chapter 6. •...
Page 52 Troubleshooting Turn the power on and Power supply wait 3 minutes 1-1 Is/was the outdoor unit power OFF? Yes 2-2 Is the terminating resistance switch (SW010) on the Setting outdoor unit’s main board set at [SHORT]? Correct to [SHORT] switches Yes 2-3 2-2 Is the number of indoor units set at two? Set [2 units]...
Page 53: E05 Indoor Unit Transmission Failure To Outdoor Unit
E05 Indoor Unit Transmission Failure to Outdoor Unit Error detection method When a self-transmitted signal cannot be self-received, an error is determined. • Indoor (water heat exchanger unit) control board is defective. • Outdoor main board terminal resistor switch setting is incorrect. Troubleshooting Yes 1-2 Is the indoor/outdoor operation wiring connected to...
Page 54: E06 Outdoor Unit Receive Failure From Indoor Unit
E06 Outdoor Unit Receive Failure from Indoor Unit 1) When the indoor unit is connected Error detection method An error is determined when no indoor unit transmission (response) is received for 3 minutes. • Indoor unit power is OFF. • Indoor unit DISP pin (CN063/CN072) is short-circuited. •...
Page 55 Yes Repair severed wires Is the indoor/outdoor operation wiring severed (connectors, Remote terminals disconnected)? controller wires Yes Correct the short circuit (wires linking 3-2 Is the indoor/outdoor operation wiring short-circuited? the remote controller to Yes Correct the ground the water heat 3-3 Is the indoor/outdoor operation wiring grounded? exchanger unit) Is voltage being applied to the indoor/outdoor operational...
Page 56 Replace the varister Is the varister (VA2) short-circuited between the phases or Water heat (VA2) severely deteriorated? exchange unit’s control board Yes 6-7 and surrounding area Check that the wiring Is electrical voltage being output to the secondary side of and terminals around the fuses (F1, F2)? the fuses are normal...
Page 57: E07 Outdoor Unit Transmission Failure To Indoor Unit
E07 Outdoor Unit Transmission Failure to Indoor Unit Error detection method When a self-transmitted signal cannot be self-received (is mismatched) for 3 minutes, an error is determined. • Outdoor main board is defective • Outdoor main board terminal resistor switch setting is incorrect. Troubleshooting “Is the indoor/outdoor operation wiring connected to Yes 1-2...
Page 58: E08 Duplicated Indoor Unit Address Setting
E08 Duplicated Indoor Unit Address Setting Error detection method An error is determined when the Indoor unit address is duplicated. • In the remote controller detailed settings mode, the indoor address setting is duplicated. • Several indoor units with no indoor unit address setting have the DISP pin (CN063/CN072) short-circuited. Troubleshooting Yes Stop using link wiring Is the water heat exchanger unit connected and link wiring...
Page 59: E09 Multiple Main Remote Controller Units Set
E09 Multiple Main Remote Controller Units Set Error detection method An error is determined when multiple main remote controllers exist within a remote controller group. • Forgot to set a remote controller “sub” when controlling with two remote controllers. • Forgot to set a remote controller “sub” when controlling with a wireless remote controller and a wired remote controller Troubleshooting Remote...
Page 60: E11 Indoor Unit Receive Failure From Signal Output Board
E11 Indoor Unit Receive Failure from Signal Output Board (Cannot be detected when the water heat exchanger unit is connected.) Error detection method After conﬁ rming existence of the signal output board, an error is determined upon no reception from the signal output board.
Page 61: E12 Automatic Address Setting Is In Progress: Automatic Address Setting Start Is Prohibited
E12 Automatic Address Setting Is in Progress: Automatic Address Setting Start is Prohibited (Cannot be detected when the water heat exchanger unit is connected.) Error detection method An error is determined when an auto-addressing startup command is received from another unit during auto- addressing.
Page 62: E13 Indoor Unit Transmission Failure To Remote Controller
E13 Indoor Unit Transmission Failure to Remote controller Error detection method When a signal transmitted from the indoor unit (water heat exchanger unit) to the remote controller cannot be self-received, an error is determined. • Indoor unit (water heat exchanger unit) control board is defective. •...
Page 63: E15 Automatic Address Alarm (Too Few Units
E15 Automatic Address Alarm (Too Few Units) 1) When the indoor unit is connected Error detection method An error is determined when the indoor unit count responding to transmission is less than the indoor unit count set on the outdoor unit. (Also detected apart from auto-addressing.) •...
Page 64 2) When the water heat exchanger unit is connected Error detection method An error may be assumed when the outdoor unit’s connection setting on the indoor unit is incorrect, and when an error exists in the connected equipment or when an error exists because the power has not been switched on, etc.
Page 65: E16 Automatic Address Alarm (Too Many Units
E16 Automatic Address Alarm (Too Many Units) Error detection method An error is determined when the indoor unit count (water heat exchanger units) responding to transmission exceeds the indoor unit count (water heat exchanger units) set on the outdoor unit. (Also detected apart from auto-addressing.) •...
Page 66: E18 Group Control Wiring Communication Failure
E18 Group Control Wiring Communication Failure (Cannot be detected when the water heat exchanger unit is connected.) Error detection method When remote controller group control main unit cannot communicate with sub unit. An error is determined when the remote controller group control sub unit has not communicated with the main unit for 3 minutes. •...
Page 67: E20 No Indoor Unit In Automatic Address Setting
E20 No Indoor Unit in Automatic Address Setting (Cannot be detected when the water heat exchanger unit is connected.) Error detection method An error is determined when an indoor unit is not recognized at auto-addressing start up or upon turning the outdoor unit power ON.
Page 68: E24 Communication Failure Between Outdoor Units (For Only W Multi
E24 Communication Failure between Outdoor Units (for only W MULTI) Error detection method An Outdoor Communication Unit Failure is assumed when communications between outdoor units in the same refrigerant system are not possible for 2 minutes. • An outdoor unit address has not been properly assigned. •...
Page 69: E26 Inconsistencies In Number Of Outdoor Units (For Only W Multi
E26 Inconsistencies in Number of Outdoor Units (for only W MULTI) Error detection method A Mismatch of Outdoor Unit Count is assumed when the number of outdoor units in the same refrigerant system (No. 10 ﬁ rst on) does not match made setting in a W MULTI (*) system. * A unit with an outdoor unit address (No.
Page 70: E31 Communication Failure Between Units
E31 Communication Failure between Units Error detection method • When communications between the boards inside the outdoor unit is not possible for 30 seconds. Troubleshooting Yes 4-3 Turn the power to the outdoor unit off and on. Does E31 Board check reoccur after one minute? Yes 2-1 Operate the engine for about 5 minutes with a trial run, etc.
Page 71: F01·02·03·10·11 Indoor Unit Temperature Sensor Error
F01·02·03·10·11 Indoor Unit Temperature Sensor Error Error detection method An indoor unit temperature sensor error constantly detects any broken wires or short circuits, and an error is determined when error conditions are met once. Error conditions are given below. 1) With indoor unit connected Broken wire detection Short-circuit detection Display...
Page 72 2) When the water heat exchanger unit is connected Are there any poor connections, contacts, crimping or Yes Repair Wiring Wiring severed wires or pinched wires in the sensor’s connectors or check connector wiring? Replace the water heat Temperature exchanger unit’s control Disconnect the sensor’s connector and measure the sensor board...
Page 73: F04·06·08·12·13·17·18/H08 Outdoor Unit Temperature Sensor Error
F04·06·08·12·13·17·18/H08 Outdoor Unit Temperature Sensor Error * H08 (temperature sensor for measuring the oil level) will only detect the oil surface with W-Multi. Re-check the settings if it is not the relevant model. Setting conﬁ rmation method: The [No.10] – [FirSt] – [Sub] display on the outdoor unit’s control board: It is not a W-Multi if this is set at [Sub 00].
Page 74: F16 Compressor Inlet/Outlet Pressure Sensor Error
F16 Compressor Inlet/Outlet Pressure Sensor Error Error detection method When pressure in the following chart is detected. Detect Open Detect Short Circuit – 0.5MPa 5.5MPa (0V) (4.9V) Troubleshooting Install gauge on large tube and small tube service port, and Yes Operate again Check open valve (see *1 below for procedure) to equalize pressure pressure...
Page 75: F20 Clutch Coil Temperature Sensor Error
F20 Clutch Coil Temperature Sensor Error Error detection method • Detected in the following situations. Broken wire detected: Sensor resistance exceeds 1800kΩ Short circuit detected: Less than 850Ω Troubleshooting Disconnect outdoor main board connector 2P (blue) CN060 Yes Replace sensor Check or 2P (yellow) CN064 and measure resistance between the sensor...
Page 76: F29 Indoor Nonvolatile Memory (Eeprom) Error
F29 Indoor Nonvolatile Memory (EEPROM) Error Error detection method • An error is determined when the nonvolatile memory (EEPROM) on the indoor (water heat exchanger unit) control board cannot be read or written. Troubleshooting Is the nonvolatile memory on the indoor (water heat exchanger Yes 1-2 Nonvolatile unit) control board correctly oriented in the IC socket, and...
Page 77: F30 Real Time Clock (Rtc) Function Error
F30 Real Time Clock (RTC) Function Error Error detection method ● An error is determined when the standard pulse (every 1 second) from the outdoor main board clock function (RTC) cannot be read. Troubleshooting Turn OFF the outdoor unit, then turn ON and observe. If the error recurs, replace outdoor Clock main board function...
Page 78: F31 Outdoor Nonvolatile Memory (Eeprom) Error
F31 Outdoor Nonvolatile Memory (EEPROM) Error Error detection method • An error is determined when the nonvolatile memory (EEPROM) on the outdoor main board cannot be written. Troubleshooting Yes 1-2 Is the nonvolatile memory on the outdoor main board correctly Nonvolatile oriented in the IC socket, and inserted ﬁ...
Page 79: H07 Compressor Oil Depletion Error (For Only W Multi
H07 Compressor Oil Depletion Error (for only W MULTI) Error detection method Each outdoor unit is inspected for lack of oil and when the oil level is 0 (insufﬁ cient) for 20 minutes, the engine stops. • An H07 failure is assumed when the engine has stopped due to insufﬁ cient oil a total of 8 times. •...
Page 80: L02 Inconsistencise In Indoor/Outdoor Unit Models
L02 Inconsistencise in Indoor/Outdoor Unit Models (non-GHP equipment connected) Error detection method • An error is detected when indoor units other than GHP models are connected. • An error is detected when package type L series indoor units and building multi outdoor units are connected. Troubleshooting Check the following, and remove or replace all non-GHP models.
Page 81: L03 Multiple Main Units Set For Group Control
L03 Multiple Main Units Set for Group Control (Cannot be detected when the water heat exchanger unit is connected.) Error detection method An error is determined when multiple main (master) units exist within a remote controller group control. • When remote controller group wiring is changed after auto-addressing is complete. •...
Page 82: L04 Duplicate System (Outdoor Unit) Address Setting
L04 Duplicate System (Outdoor Unit) Address Setting Error detection method An error is determined when identical system (outdoor unit) addresses exist within the same link wiring. • When the system (outdoor unit) address settings were forgotten during link wiring. • When the system (outdoor unit) address settings were accidentally duplicated during link wiring. •...
Page 83: L05·06 Duplicate Indoor Unit Priority Setting
L05·06 Duplicate Indoor Unit Priority Setting (Cannot be detected when the water heat exchanger unit is connected.) Error detection method An error is determined when multiple indoor units have the operation mode priority setting within the same refrigeration tubing system. •...
Page 84: L07 Group Control Wire Present For Individual-Control Indoor Unit
L07 Group Control Wire Present for Individual-Control Indoor Unit (Cannot be detected when the water heat exchanger unit is connected.) Error detection method An error is determined when remote controller group wiring includes an indoor unit set for independent operation. •...
Page 85: L08 Indoor Unit Address Not Set
L08 Indoor Unit Address Not Set Error detection method An error is determined when the indoor unit capacity is not set. • When the indoor unit address was not set when new non-volatile memory (EEPROM) was installed. • When indoor unit address in the remote controller detailed settings mode is “invalid.” Troubleshooting Use the remote controller detailed settings mode to check indoor unit addresses (item code Indoor unit...
Page 86: L09 Indoor Unit Capacity Not Set
L09 Indoor Unit Capacity Not Set (Cannot be detected when the water heat exchanger unit is connected.) Error detection method An error is determined when the indoor unit capacity is not set. • When the indoor unit capacity setting was forgotten after installing a new nonvolatile memory (EEPROM). •...
Page 87: L10 Outdoor Unit Capacity Not Set
45.0kW models (2WAY W MULTI · 3WAY MULTI)     56.0kW models (2WAY W MULTI · 3WAY MULTI)     71.0kW models (2WAY W MULTI · 3WAY MULTI)     85.0kW models (2WAY MULTI)     IV–74...
Page 88: L13 Indoor Unit Model Type Setting Failure
L13 Indoor Unit Model Type Setting Failure Error detection method Errors are determined when the types, capacity levels and models that cannot be connected have not been set. • When the water heat exchanger unit and an indoor unit other than a water heat exchanger unit have been connected together within the same cooling system.
Page 89: L15 Defective Pairing Of Indoor Units
L15 Defective Pairing of Indoor Units Error detection method 1) In the case of double-duct models Detects defective combinations (type, capacity, group and unit count settings) in double-duct units. Troubleshooting 1) In the case of double-duct models Problem Recovery Another indoor unit is connected to the system to Connect only one indoor unit to the system which a double-duct unit is connected.
Page 90: L16 Faulty Water Heat Exchanger Unit Settings
L16 Faulty Water Heat Exchanger Unit Settings * Only detected when the water heat exchanger unit is connected. Re-check the settings if it is not the relevant model. Error detection method An error is determined in accordance with the criteria shown below the ﬁ rst time the settings on the water heat exchanger unit’s control board are incorrect.
Page 91 ● 2-4 The coolant temperature setting is performed with SW2 and SW3 (green rotary switches). Set SW2 at tens place and SW3 at ones place. The set temperature range is between +5°C and +15°C. (Example: If SW2 is set at “0” and SW3 at “7”, the set temperature is “+7°C”.) ●...
Page 92: L19 Duplicated Water Heat Exchanger Unit Parallel Array Addresses
L19 Duplicated Water Heat Exchanger Unit Parallel Array Addresses * Only detected when the water heat exchanger unit is connected. Re-check the settings if it is not the relevant model. Error detection method An error is determined in accordance with the criteria shown below when duplicated water heat exchanger unit parallel array addresses are detected •...
Page 93: L21 Gas Type Setting Failure
L21 Gas Type Setting Failure Error detection method A Gas Type Setting Failure is assumed on the ﬁ rst occurrence of a mismatch between the gas type setting on the outdoor main board and the fuel change switch setting. However, a mismatch is not detected after the gas type is conﬁ rmed. * The factory default gas type setting and fuel change switch setting are both “13A.”...
Page 94: P01 Indoor Fan Error/Indoor Unit Fan Rpm Error
P01 Indoor Fan Error/Indoor Unit Fan rpm Error (Cannot be detected when the water heat exchanger unit is connected.) Error detection method • Detects when indoor control board connector T20 (gray) CN076 1-3 are open and assumes an error has occurred.
Page 95: P03 High Compressor Discharge Temperature
P03 High Compressor Discharge Temperature Error detection method • When the compressor discharge temperature ≥ 130°C during engine operation (complete combustion), the engine is stopped and an error ﬂ ag is set. A Compressor Discharge Temp. High fault is assumed when this ﬂ ag has shut down the engine 5 consecutive times.
Page 96 ● For work procedure for replacing outdoor main board, see “5. Reference Document”. ● For board and Electrical Wiring Diagram, see Chapter 6. • Outdoor main board: page VI-2 • Outdoor power board: page VI-3 • Converter board: VI-4 • Indoor control board for DC motor models: page VI-5 •...
Page 97: P04 Refrigerant High-Pressure Switch Operation
P04 Refrigerant High-Pressure Switch Operation Error detection method • When high pressure switch turns OFF Setting: 4.15MPa * Turns ON when contact is not defective (switch automatically resets) Troubleshooting Yes 1-2 1-1 Is the outdoor unit a renewal-dedicated unit? Model setting Is the model setting correct? (Is the parameter a renewal Yes 2-1...
Page 98: P05 Power Source Error
P05 Power Source Error Error detection method An error is determined when the power source status meets the following condition. • Open phase • Instant power failure exceeding 100ms (5 times/h) Troubleshooting Yes 1-2 Are all power supply voltages AC 200 V? Power (Measure between terminal boards R-S, S-T and T-R.) Check power supply...
Page 99: P09 Indoor Unit Ceiling Panel Connector Connection Failure
P09 Indoor Unit Ceiling Panel Connector Connection Failure (Cannot be detected when the water heat exchanger unit is connected.) Error detection method • Detects when indoor control board connector PNL (3P green) CN080 1 and 3 are open, and determines an error.
Page 100: P10 Indoor Unit Float Switch Operation
P10 Indoor Unit Float Switch Operation (Cannot be detected when the water heat exchanger unit is connected.) Error detection method • Detects when indoor control board connector FS (red) CN034/CN030 1-3 are open, and determines an error. • The sensor connected between No.1 and No.3 of connector FS (red) CN034/CN030 is normally a drain ﬂ...
Page 101: P11 Water Heat Exchanger Unit Anti-Icing Sensor Error
P11 Water Heat Exchanger Unit Anti-icing Sensor Error (for only water heat exchanger unit) Error detection method An error is detected as follows: • When anti-freeze temperature is detected, and recovery temperature is not reached within 3 minutes. * Anti-freeze temperatures (When any one of the following conditions is reached.) Water chiller Hot and cold water outlet temperature Less than +2°C...
Page 102: P12 Indoor Dc Fan Error (Dc Fan Motor Model Only
P12 Indoor DC Fan Error (DC fan motor model only) Error detection method • Open circuits and short-circuits in the indoor control board connector CN333 (red) and CN334 (red) on the motor side are detected and assessed as faults. Troubleshooting Yes Repair Any poor connections or broken wires in indoor control board Fan motor...
Page 103: P13 Refrigerant Circuit Error (W Multi
P13 Refrigerant circuit Error (W MULTI) *Please note that 3WAY models use a different troubleshooting procedure. Error detection method • The indoor unit outputs this warning when it determines that a compressor inspection is required. • The system stops and there is no automatic reset when this warning is output. When there is no difference between compressor outlet and inlet pressure (≤0.2 MPa *) 3 minutes after the engine was turned on, the engine stops and an error ﬂ...
Page 104: P13 Refrigerant Circuit Error (3Way
P13 Refrigerant Circuit Error (3WAY) Error detection method • The indoor unit outputs this warning when it determines that a compressor, outdoor solenoid valves, system refrigerant should be inspected. • For detailed inspection procedure, see P13 Refrigerant Circuit Fault (W MULTI). •...
Page 105 Yes Repair wiring Any poor connection and broken wires in wiring between the outdoor main board and the relay board? Adjust the relay board. Yes 7-7 In No. 4 test mode when “v_open” (valve open), is there an output voltage (AC 200V) from discharge valves 1-1, 1-2, discharge valve 2, suction valve 2-1 and 2-2? Does suction valve 1 output a voltage (AC 200V) during Replace relay board...
Page 106: P15 Complete Refrigerant Gas Depletion
P15 Complete Refrigerant Gas Depletion Error detection method • Engine startup is delayed when compressor inlet pressure ≤0.1 Mpa. A delay that lasts 10 minutes is counted as a fault. • During engine operation (complete combustion) when (compressor inlet pressure ≤ 0.1 MPa) or (outdoor heat exchanger outlet temperature - saturation temperature) ≥...
Page 107: P18 Bypass Valve Error
P18 Bypass Valve Error Error detection method • A warning is output if it is determined that the outdoor unit needs a bypass valve inspection. • In practical terms, what happens is that each time there is a small difference ( P ≤...
Page 108: P19 Four-Way Valve Lock Error (Not Detected 3Way Multi
P19 Four-way Valve Lock Error (not detected 3WAY MULTI) Error detection method • Determined after 6 minutes of complete combustion time has passed during heating operation. • An error is determined in thermostat ON indoor units, when the highest indoor heat exchanger outlet (E3) temperature is detected to be lower than the outdoor heat exchanger inlet for 5 minutes continuously.
Page 109: P20 Refrigerant High-Pressure Error
P20 Refrigerant High-Pressure Error Error detection method • When the high pressure sensor value ≥ 3.75 MPa during engine operation, the engine stops and an error ﬂ ag is set. A Refrigerant Pressure Too High fault is assumed when this ﬂ ag has stopped the engine 5 consecutive times in 1 hour.
Page 110 Check the motor-operated valve on the water heat exchanger 10-1 Water heat unit. Does the valve open? (Check the temperature of the exchanger water heat exchanger unit’s coil in the heating mode.) unit’s motor- Check the water heat exchanger unit’s control board. (Is there operated any voltage between No.
Page 111 Repair wiring Are there any poor connections or severed wires in the wiring 15-5 between the outdoor unit’s main board and relay board? 15-6 Check the relay board. 15-7 Does an output voltage (AC 200 V) from discharge valves 1-1, 1-2, discharge valve 2, suction valve 2-1 and 2-2 exist with 15-6 “v_open”...
Page 112 ● 9-1 Orange Checking the Water Heat Exchanger Unit’s Motor-Operated Valve Standard for determining that the motor-operated valve is open: Yellow The temperature of the water heat exchanger’s coolant outlet must be Black 40°C or higher when 30 minutes have elapsed after reaching complete combustion in the heating mode.
Page 113 ● 12-1 Check high pressure sensor Compare control board display and gauge display. Install gauge on high pressure side, and display the outdoor Yes To Conﬁ rm pressure main board compressor outlet pressure. Use No.0 Operation while stopped data display (data code 11). Is the difference between display value and gauge pressure within 0.1MPa? Operate heater or cooler, and check the outdoor main board Pressure sensor is...
Page 114: P22 Outdoor Unit Fan Error
P22 Outdoor Unit Fan Error Error detection method ● An Outdoor Unit Fan Trouble is assumed when outdoor fan (fan motor) rpm and drive has exceeded the following conditions 5 consecutive times in 1 hour. • When outdoor fan (fan motor) revolution is not detected. •...
Page 115: P23 Water Heat Exchanger Unit Interlock Error (For Only Water Heat Exchanger Unit
P23 Water Heat Exchanger Unit Interlock Error (for only water heat exchanger unit) Error detection method An error is detected when the following conditions are met: • After a hot and cold water pump operation command, when the hot and cold water pump interlock signal (no voltage, a contact) is not ON within 5 minutes.
Page 116: P26 Clutch Connection Error
P26 Clutch Connection Error Error detection method A clutch connection failure will be recognized as abnormality only when it occurs 5 times due to the following main cause. ・The revolution speed does not slow down and the high and low differential pressures of refrigerant circuit remains unchanged for 3 minutes while the clutches are in the on-state during complete combustion of the engine.
Page 117: P30 Group Control's Sub Unit Error (* Warning Displayed Only On System Controller
P30 Group Control’s Sub Unit Error (* warning displayed only on system controller) Error detection method When an error occurs on a group control sub unit (for all abnormalities), the system controller displays P30. Troubleshooting Conﬁ rm error details using one of the following methods. Check warning display on wired remote controller.
Page 118: P31 Group Control Error
P31 Group Control Error (Cannot be detected when the water heat exchanger unit is connected.) Error detection method Under the following conditions, all non-master units in the remote controller group display this error and stop. • When remote controller linking wiring is connected to an indoor unit independently controlled by a remote controller (L07) •...
Page 119: Oil Oil Change Time Alarm
oiL Oil Change Time Alarm Error detection method When the oil change time exceeds the EEPROM setting-200 hours. (A02 warning is issued when EEPROM time setting is exceeded.) Note: • Engine does not stop with warning. • No warning detection when the gas type setting is “1.” •...
Page 120: Reference Document
5. Reference Document (1) Outdoor Main Board Replacement Sequence and Remote Controller Service Function Outdoor Main Board Replacement Sequence To replace the outdoor main board, perform the work through the following sequence. 1) Turn off the power supply, and replace the outdoor main board. 2) Transfer the nonvolatile memory (EEPROM) from the old board to the new board.
Page 121 Outdoor Nonvolatile Memory (EEPROM) Replacement Sequence ● When replacing the outdoor main board, in the event of nonvolatile memory breakage or F31 error, the work of replacing the outdoor nonvolatile memory should be conducted in the following sequence. ● A nonvolatile memory is also used in the indoor unit, but be aware that there is no compatibility between the memories.
Page 122: Switch And Led
(2) Switch and LED S004, S005, S006, S007 (HOME, UP, DOWN, SET) ● These switches are used to perform7-segment LED service display changes and type settings. ● These key switches are used to determine (maintain operation of) various items, raise and lower items being displayed, etc.
Page 123 S010 (Terminal resistor On/Off switch) ● This switch is used for matching on communication lines. ● When only one outdoor unit is connected to a single communication line, conﬁ rm that the setting is on the “SHORT” side. ● The factory setting is “SHORT” ●...
Page 124: Display Component Speciﬁ Cations
(3) Display Component Speciﬁ cations Warning display (red) During warnings, TEST/WARNING LED (D052) ﬂ ashes. Forced setting display (red) Upon forced settings during normal display, the TEST/WARNING LED (D052) lights. During display of forced settings on the menu item display, the TEST/WARNING LED (D052) lights. (This may be used to search for forced setting items during setting.) Level LED display (green) The Level LED (D053) displays the setting menu stage level and other information.
Page 125: Operation Unit Speciﬁ Cations
(4) Operation Unit Speciﬁ cations Operation Three keys DOWN (S006), UP (S005) and SET (S007) are basically used to perform all display and setting operations. Pressing the HOME (S004) for one second activates return to the normal display at any time (this key is installed in a slightly separated position).
Page 126: Normal Display (Level 0
(5) Normal Display (Level 0) The normal display appears after passing through the display subsequent to turning the power supply ON, when selecting menu No. 0, or when no key operation occurs for 10 minutes. Normal Display (Level 0) On this outdoor unit system, the following data displays are repeated at 10-second intervals. Display Display contents Display examples...
Page 127 Error Display (Level 0) Conditions : Error being issued Display : TEST/WARNING LED ﬂ ashing. Warning contents displayed on 7-segment LED. “When a multiple number of error occur, each error will be displayed in approx. 1-second cycles, in the sequence of: Outdoor error → Outdoor warning → Indoor error.” Example: “...
Page 128: Menu Display
(6) Menu Display Press the UP (S005) or DOWN (S006) key to select menu items. During and after item changes, the menu number display appears for about 1 second (0.7 seconds), followed by the letter display. Selecting an item and then pressing the SET (S007) key selects that item. The HOME (S004) key always displays “...
Page 129 Operation Data Display: No. 00 (  ) The normal (or special) display usually appears, with key operation used to display current data. 1) Normal display (Level 0) The following data displays are repeated at 2-second intervals with this outdoor unit system. Display sequence Display contents Display examples...
Page 130 5) Data setting operation (Level 2) Setting start operation method : Press the SET (S007) key for one second in the setting data code select mode. This activates the forced setting in progress display. (TEST/WARNING LED light) Setting change operation method : After entering the setting start operation mode, operating the UP (S005) and DOWN (S006) keys make it possible to change the setting details of the selected setting categories.
Page 131 Outdoor unit heat exchange 2 inlet °C  30~50 -5~10 temperature (3WAY only) 20 Refrigerant temperature °C 60~83 55~83  21 Outside air temperature °C  22 Clutch coil temperature °C  23 Catalyst temperature °C  24 Hot water outlet temperature (optional) °C ...
Page 132 70 Thermostat on unit count Units  71 Average thermostat on intake temperature °C  Average thermostat on discharge °C  temperature 73 Average thermostat on E1 temperature °C  75 Average thermostat on E3 temperature °C  • Indoor unit data 1 No.1 indoor unit solenoid value opening Step ...
Page 133 Error Data Display: No. 1 (Level 0) <  > Error data displays and error resets are conducted. Error data, including pretrips, are stored in the nonvolatile memory for the 3 most recent incidents. When an error occurs for the 4 time and beyond, the oldest error data is erased and the 3 most recent incidents are stored.
Page 134 4) Error code, temporary stop cause code display (Level 1) During displays with no error and displays when error incidents occur, pressing the SET (S007) key causes the error code and temporary stop cause code to be displayed. Data is displayed by selecting with the UP (S005) and DOWN (S006) keys. Data code Data name Display examples...
Page 135 5) Error Data Display (Level 2) During error log code display, pressing the SET (S007) key for one second or more activates the error data display at that time. Example:  — Pressing the SET (S007) key →  Pressing the SET (S007) key again for one second or more, or when there are no operations for 10 minutes, returns to the normal display.
Page 136 Data Display Data name Unit Remarks code examples Engine revolution setting 2,200 min  Engine revolutions  2,200 min Compressor inlet pressure 0.10 MPa  Compressor outlet pressure  1.00 MPa Compressor inlet temperature °C 35.0°C  Compressor outlet temperature °C 110.0°C ...
Page 137 Data Display Data name Unit Remarks code examples Revolution speed variable (F_rpm)  Compressor oil level (W-Multi) Level 2  Engine ignition time Degree 10 degrees  Thermostat on unit count Unit 20 units  Average thermostat on intake temperature °C 19.4°C ...
Page 138 ● Outdoor Unit Data 5 Seconds Earlier (A.1 to A.i) Data Display Data name Unit Remarks code examples Engine revolution setting 2,200 min  Engine revolutions 2,200 min  Compressor inlet pressure  0.10 MPa Compressor outlet pressure 1.00 MPa ...
Page 139 6) Error log clear Clears all of the error log and temporary stop causes for this outdoor unit. Operation method: Press the SET (S007) key for one second.  →  →  (clearing) (complete) 7) Error (alarm) code list Error Error Error (Alarm) Contents...
Page 140 Error Error (Alarm) Contents Code (System P: Indoor/outdoor protective device operations) Indoor fan error / indoor fan rpm error High compressor discharge temperature Refrigerant high-pressure switch operations Power supply error Indoor unit ceiling panel connector connection defect Indoor unit ﬂ oat switch operations Water heat exchanger unit anti-icing sensor error (when the water heat exchanger unit is connected)
Page 141 Oil Change Time Display: No. 02 (Level 0) <  > This function displays the oil change time. Key operations are used to perform the oil change time clear setting. 1) Oil change time display (Level 0) This display indicates the current oil change time. Example: ...
Page 142 Model Type Display: No. 03 (Level 0) <  > This function is used to display the outdoor unit model type. It may also be used for the double-speed setting (fast-forwarding the forced 3-minute off timer). Operating the UP (S005) and DOWN (S006) keys causes the menu to change. 1) Model type display (Level 0) Outdoor unit model types are displayed in the following way.
Page 143 Test Run and Outdoor Unit Forced Settings: No. 4 (Level 0) <  > Key operation is used to determine the settings for forced test run, forced bypass valve closing, forced water circuit and forced valve opening. 1) Test run and forced setting display (Level 0) Displays of the test run and forced settings selected with the menu.
Page 144 5) Force valve opening setting (Level 2)... Used for evacuation, etc. Display :  Rejection conditions : Forced cooling test run in progress, forced heating test run in progress, bypass valve being closed Operating method : Press the SET (S007) key for one second while forced valve opening is not set. (TEST/WARNING LED light) Operation details : Indoor unit electric valve, outdoor unit electric valve 1, outdoor unit electric valve 2,...
Page 145 9) Forced engine distributor mode (Level 2) ... Used when ﬁ xing ignition timing. Display :  Rejection conditions : None Operating method : Press the SET (S007) key for one second while forced engine distributor mode is not set. (TEST/WARNING LED light) Operation details : Activates forced engine distributor mode.
Page 146 12) Forced defrosting operation setting (Level 2)... Used when frost builds up on the outdoor unit’s heat exchanger when in the heating mode. * Cannot be set with W-Multi and 3WAY. * This setting applies a load to the equipment, and it must not be set if no frost has built up on the outdoor unit’s heat exchanger.
Page 147 15) Forced cranking mode (Level 2)... Used when measuring engine compression. Display :  Rejection conditions : During total stop. Operation method : Press the SET key for one second without the forced cranking mode being set. (The TEST/WARNING LED will be illuminated.) Operation details : Operations will be halted automatically when the engine is operating.
Page 148 Outdoor Unit Setting: No. 5 (Level 0) <  > Key operation is used to perform the outdoor unit setting. 1) Outdoor unit setting display (Level 0) Displays selection of outdoor unit setting mode at the menu.  2) Outdoor unit setting item select operation (Level 1) Pressing the SET (S007) key while in the outdoor unit setting display mode activates the following display.
Page 149 4) Outdoor Unit Setting List (1) Data code Data Data code Data Minimum set revolution speed Maximum set revolution speed Oil change time display switch Mixer offset Automatic cooling/heating mode Engine linked operation time setting Reference system Cooler/heater auto-control Revolution speed differential reference α1 (Cooling high-pressure offset) α2 (Heating high-pressure offset) Ignition time offset...
Page 150 Data code Data Data code Data Energy-saving mode setting * Refrigerant shut-off value (optional) existence W-Multi oil collection control setting Fan output when snowfall sensor input is “yes” Gas demand ﬂ ow volume rated value Outdoor unit sequential startup within the system (The default value is the reference value.
Page 151 Indoor Unit Setting: No. 6 (Level 0) <  > Key operation is used for indoor unit settings (operation impossible when connecting the water heat exchanger). 1) Indoor unit setting display (Level 0) Shows menu selected indoor unit status display. ...
Page 152 Forced engine rpm setting No. 08 (Level 0) <  > Forced setting of setting engine rpm is possible. 1) Forced engine rpm setting display (Level 0) Displays selection of the forced engine rpm setting at the menu.  2) forced engine rpm setting (Level 1) Pressing the SET (S007) key in the forced engine rpm setting display mode activates the following display cycle, which is repeated at 1-second intervals.
Page 153 Indoor Unit Status Display: No. 9 (Level 0) <  > Displays of connected indoor unit status. Also possible to activate forced thermostat-off settings for speciﬁ c indoor units. 1) Indoor unit status display (Level 0) Shows menu selected indoor unit status display. ...
Page 154 3) Indoor unit forced thermostat off setting (Level 2) Press the SET (S007) key during indoor unit thermostat status display. (Example: No. 1 - 24 units connected) Note: 1 dot at lower right : Normal status unit Flashing : ● 1-sec. cycle ﬂ ashing indicates thermostat-off unit numbers ●...
Page 155 Initial Setting: No. 10 (Level 0) <  > Key operation is used to perform the initial setting. Initial setting details are as follows. 1) Initial setting display (Level 0) Displays selection of the initial setting at the menu.  2) Initial setting item select operation (Level 1) Pressing the SET (S007) key in the initial setting display mode activates the following display.
Page 156 3) System address setting (Level 2) Rejection conditions : Not accepted during indoor operation Setting start operation method : Press the SET (S007) key for one second. Setting change operation method : After entering the setting start operation mode, operating the UP (S005) and DOWN (S006) keys makes it possible to change the setting values.
Page 157 6) Refrigerant setting (Level 2) Rejection conditions : Not accepted during indoor operation Setting start operation method : Press the SET (S007) key for one second. Setting change operation method : After entering the setting start operation mode, operating the UP (S005) and DOWN (S006) keys makes it possible to change the setting values.
Page 158 Setting range : 00 to 07 Standard  W MULTI  3WAY MILTI  (No current setting)  Standard Panasonic model  W-Multi Panasonic model  3WAY Panasonic model  (No current setting)  10) Region setting (Level 2) Rejection conditions...
Page 159 11) Hot water setting (Level 2) Rejection conditions : Not accepted during indoor operation Setting start operation method : Press the SET (S007) key for one second. Setting change operation method : After entering the setting start operation mode, operating the UP (S005) and DOWN (S006) keys makes it possible to change the setting values.
Page 160 14) Tube connection conﬁ rmation (Level 2) <Cannot be set if not W MULTI> Rejection conditions : Indoor unit operation in progress, cooling automatic addressing in progress Setting start operation method : Push the SET (S005) key for 1 second. (Forced / error LED light) Setting change operation method : Automatic completion.
Page 161 Date Display: No. 11 (Level 0) <  > Display of the current date Key operation is used to display the time and set the date. 1) Date display (Level 0) Displays the date. Example:  (Example: April 1, 2012) 2) Date display (Level 1) In the date display mode, pressing the SET (S007) key activates the next display.
Page 162: Ignition Timing Check And Adjustment
(8) Ignition Timing Check and Adjustment Preparation for work Turn off remote controllers for all indoor units. Conﬁ rm outdoor units have stopped. Distributor mode setting Set the distributor mode by selecting “      ” from the “     ” test run forced setting display. 1) Press the HOME key (S004) for one second or more.
Page 163 Start test run and set engine rotational speed Start test run, and select “     ” forced engine rpm setting, and set 800 [min Start test run. 1) Press the HOME key (S004) for one second or more.
Page 164 6) Press the SET key (S007). The LEVEL LED (D053) will light, and the status with the engine rotating at the forced (set) speed will be displayed at one-second intervals, as shown below. Display Item  (10.1400) Forced engine rotational speed (example: 1400 min ...
Page 165 Correction for distorted amount If the value is different than that displayed by “   ” (engine ignition timing) set in item ( ) above, select “   .” (ignition timing offset) in “     ” engine settings, and correct for the distorted amount. 1) Press the HOME key (S004) for one second or more.
Page 166 5) Make the correction Correction example a) The adjustment value is 10° BTDC, but the observed value was 8° BTDC. Press the UP (S005) or DOWN (S006) key to set a correction of +2 in relation to the current “   ” (ignition timing offset) value. Display the current “...
Page 167 Correction example b) The adjustment value is 10°BTDC, but the observed value was 13° BTDC. Press the UP (S005) or DOWN (S006) key to set a correction of -3 in relation to the current “   ” (ignition timing offset) value. Display the current “...
Page 168 Cancel settings When ignition timing correction is ﬁ nished, cancel the forced rotational speed setting and the distributor mode. Make sure to do this. 1) Press the HOME key (S004) for one second or more. Menu item number “     ” (right ﬁ gure) will be displayed.
Page 169 7) Press the SET key (S007). “     ” (right ﬁ gure) will be displayed. The LEVEL LED (D053) and TEST/WARNING LED (D052) will light. 8) Press the UP (S005) or DOWN (S006) key, to display “      ” (right ﬁ gure). Press the SET key (S007) for one second or more.
Page 170: Thermistor Characteristic Graph
(9) Thermistor characteristic graph Indoor unit heat exchanger inlet temperature sensor, indoor unit heat exchanger outlet temperature sensor, outside air temperature sensor, compressor inlet temperature sensor, outdoor unit heat exchanger inlet temperature sensor, hot water outlet temperature sensor Temperature (°C) Compressor outlet temperature sensor, exhaust gas temperature sensor, generator temperature sensor Temperature (°C) V–51...
Page 171 Coolant temperature sensor Temperature (°C) Indoor unit intake temperature sensor, indoor unit discharge temperature sensor Temperature (°C) Clutch coil temperature sensor, clutch-2 coil temperature sensor Temperature (°C) V–52...
Page 172: Checks Prior To Automatic Addressing
(10) Checks Prior to Automatic Addressing * When an outdoor unit alarm is displayed, perform the following checks after troubleshooting. Yes 2-1 Indoor/outdoor power Indoor and outdoor units turned on? Turn on the power source Yes 2-2 Have the inside/outside control wires been laid? Is there a Indoor/outdoor control Wiring and break or disconnection of wires?
Page 173: Indoor/Outdoor Control Wire Connection Conﬁ Rmation
(11) Indoor/outdoor control wire connection conﬁ rmation Check the control wire connection regardless of whether there is a warning or not. Before performing the check, turn off the power of all devices (including controllers) that are connected to the indoor/outdoor control wire. Measure the resistance between one end of the indoor/outdoor control Yes 2-1 Ground fault check...
Page 174 Indoor Indoor Indoor For units other than W MULTI Outdoor Unit Unit Unit Unit Indoor Indoor Indoor Wire connecting the systems Outdoor Unit Unit Unit Wire connecting the systems Unit Indoor Indoor Indoor Outdoor Unit Unit Unit Unit • When the wiring route is divided into segments by the terminal block of each unit, it is advisable to check the wiring connection on a segment by segment basis, starting with the segment between the outdoor unit and indoor unit 1, then the segment between the indoor units 1 and 2, and so on.
Page 175 ● If communication error occurs, check the sensor’s ground fault. ● Check sensors (thermistor) ground fault. Before checking, turn off the device and remove target sensor from the board before performing measurement. Measure the resistance between one end of the indoor/outdoor control wire Yes Good Ground fault check and the point of ground screw, as well as the resistance between the other...
Page 176 V–57...
Page 177 1. Do not lay signal cables next to power line in order to prevent miss-operations. 2. Maintain a distance of 50 mm or more between the power lines of other air-conditioning units manufactured by Panasonic. 3. Maintain a distance of 300 mm or more between other power lines.
Page 178 1. Do not lay signal cables next to power line in order to prevent miss-operations. 2. Maintain a distance of 50 mm or more between the power lines of other air-conditioning units manufactured by Panasonic. 3. Maintain a distance of 300 mm or more between other power lines.
Page 179 Control wire ● Indoor/outdoor control wire connection example 1) Bus system (can be branched to max 16 location). Outdoor link is basic. (Figure 3) Outdoor unit Controller Indoor unit Indoor unit Indoor unit Outdoor unit Remote controller At least 2 m Indoor unit Indoor unit Indoor unit...
Page 180 3) Wiring without branching (Figure 5) Column: Part of indoor wiring branches. Outdoor unit * If this portion is 1 m or less, it is not considered a branch. Controller Indoor unit Indoor unit Indoor unit Outdoor unit Remote controller Indoor unit Indoor unit Indoor unit...
Page 181 6) Loop wiring is prohibited. (Figure 8) Example: As shown in the ﬁ gure, do not have wiring where part of it is looped or the entire wiring is looped. Outdoor unit Controller Indoor unit Indoor unit Indoor unit Outdoor unit Remote controller Indoor unit Indoor unit...
Page 182: Outdoor Unit Electrical Wiring Diagram
6. Outdoor Unit Electrical Wiring Diagram <Reading the board and wiring diagram> Example : When referring to “Electrical wiring diagram A-3”, look at the area around the frame in the following diagram. VI–1...
Page 183: Outdoor Main Board
(1) Outdoor main board Position in Position in Name Name the diagram the diagram Terminal resistor ON/OFF switch (S010) 17 CN075 STOP SW (S001) 18 EEPROM Indoor/outdoor communications monitor (D043) 19 CN037(WHITE) CN049(RED) Compressor outlet/inlet pressure Gas solenoid valve forced off switch (S002) sensors.
Page 184: Outdoor Power Board
(2) Outdoor power board Name Position in the diagram CN002 (yellow) CN085 (pink) CN084 (purple) CN028 (yellow) CN041 (white) CN033 (white) VRR CN022 (white) CN025 (black) CN040 (red) Exhaust temp. VI–3...
Page 185: Converter Board
(3) Converter board VI–4...
Page 186: Indoor Control Board For Dc Motor Models
(4) Indoor control board for DC motor models Name Position in the diagram EEPROM Heat exchanger outlet E3 (brown) TEST pin (CN2) Heat exchanger inlet E1 (red) Discharge (green) (BL) CHK pin (CN5) Room temp (intake) TA (yellow) 10 OPTION 11 CN078 DP (red) 12 CN034 FS (red) 13 CN334 (red)
Page 187: Outdoor Unit Electrical Wiring Diagram
(5) Outdoor Unit Electrical Wiring Diagram VI–6...

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Panasonic 2WAY Multi Technical & Service Manual

1 Symptoms that Are Not Malfunctions

2 Before Troubleshooting (W MULTI Series

W MULTI Series System Overview

About Backup Operation During Maintenance Work

3 Malfunctions and Displays

Malfunctions Without any Display

Remote Controller Alarm Display

4 Error Display and Troubleshooting

Precautions before Troubleshooting

About the Error Detection Procedure

Engine Start Standby

Troubleshooting

5 Reference Document

Switch and LED

Display Component Speciﬁ Cations

Operation Unit Speciﬁ Cations

Normal Display (Level 0

Menu Display

Ignition Timing Check and Adjustment

Thermistor Characteristic Graph

Checks Prior to Automatic Addressing

Indoor/Outdoor Control Wire Connection Conﬁ Rmation

6 Outdoor Unit Electrical Wiring Diagram

Outdoor Main Board

Outdoor Power Board

Converter Board

Indoor Control Board for DC Motor Models

Outdoor Unit Electrical Wiring Diagram

Quick Links

Troubleshooting

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Summary of Contents for Panasonic 2WAY Multi

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Table of Contents