Panasonic U-72MF1U9 Service Manual
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Panasonic U-72MF1U9 Service Manual

3way vrf system
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TEST RUN SERVICE MANUAL
U-72MF1U9
U-72MF1U9E
U-96MF1U9
U-96MF1U9E
TENTATIVE
Model No.
Outdoor Units
Class
U-72MF1U9
Model Name
U-72MF1U9E*
Refrigerant R410A is used in the outdoor units.
* Salt-Air Damage Resistant Specifications.
Indoor Units
Class
U1
4-Way Cassette
Y1
4-Way Cassette 60×60
D1
1-Way Cassette
S-07MD1U6
F1
Low Silhouette Ducted
S-07MF1U6
M1
Slim Low Static Ducted
S-07MM1U6
High Static Pressure
E1
Ducted
T1
Ceiling
K1
Wall Mounted
S-07MK1U6
P1
Floor Standing
S-07MP1U6
Concealed Floor
R1
S-07MR1U6
Standing
Necessary to install the External Electronic Expansion Valve Kit (Optional:CZ-P56SVK1U).
**
85464849302000
*
*
72
96
U-96MF1U9
U-96MF1U9E*
7
9
12
S-12MU1U6
S-12MY1U6
S-09MD1U6
S-12MD1U6
S-09MF1U6
S-12MF1U6
S-15MF1U6
S-09MM1U6
S-12MM1U6
S-15MM1U6
S-12MT1U6
S-09MK1U6
S-12MK1U6
S-09MP1U6
S-12MP1U6
S-15MP1U6
S-09MR1U6
S-12MR1U6
S-15MR1U6
3WAY VRF SYSTEM
15
18
19
S-18MU1U6
S-24MU1U6
S-18MY1U6
S-18MF1U6
S-24MF1U6
S-18MM1U6
S-18MT1U6
S-24MT1U6
S-18MK1U6
S-19MS1U6**
S-24MK1U6
S-24MP1U6
S-18MP1U6
S-18MR1U6
S-24MR1U6
24
36
48
S-36MU1U6
S-36MF1U6
S-48MF1U6
S-54MF1U6
S-36ME1U6
S-48ME1U6
SM830202-00
REFERENCE NO.
1
2
3
54
4
5
6
7

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  • Page 1 TEST RUN SERVICE MANUAL 3WAY VRF SYSTEM U-72MF1U9 U-72MF1U9E U-96MF1U9 U-96MF1U9E TENTATIVE Model No. Outdoor Units Class U-72MF1U9 U-96MF1U9 Model Name U-72MF1U9E* U-96MF1U9E* Refrigerant R410A is used in the outdoor units. * Salt-Air Damage Resistant Specifications. Indoor Units Class 4-Way Cassette...
  • Page 2 IMPORTANT! Please Read Before Starting When Installing… This air conditioning system meets strict safety and operat- ing standards. As the installer or service person, it is an …In a Room important part of your job to install or service the system so it operates safely and efficiently.

  • Page 3: Check Of Density Limit

    Check of Density Limit The room in which the air conditioner is to be installed requires a design that in the event of refrig- erant gas leaking out, its density will not exceed a set limit. The refrigerant (R410A), which is used in the aircondition- er, is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws imposed to protect the ozone layer.

  • Page 4: Table Of Contents

    Contents Section 1: TEST RUN ......................1-1 Test Run ......................1-2 Setting of Unit Control PCB ................1-4 Auto Address Setting ..................1-6 Remote Controller Test Run Settings .............1-12 Caution for Pump Down .................1-13 Meaning of Alarm Messages .................1-14 Section 2: REMOTE CONTROL FUNCTIONS ................2-1 Main Operating Functions ................2-2 Wireless Remote Controller ................2-4 Timer Remote Controller................2-15...

  • Page 5: Test Run

    Test Run TENTATIVE Contents 1. TEST RUN 1. Test Run ..........................1-2 1-1. Preparing for Test Run ....................1-2 1-2. Test Run Procedure .......................1-3 2. Setting of Unit Control PCB ....................1-4 2-1. Main Outdoor Unit PCB Setting..................1-4 3. Auto Address Setting ......................1-6 3-1.

  • Page 6: Test Run

    Test Run 1. Test Run 1-1. Preparing for Test Run Before attempting to start the air conditioner, check the fol- lowing. (1) All loose matter is removed from the cabinet, especially steel fi lings, bits of wire, and clips. (2) The control wiring is correctly connected and all electrical (Power must be turned ON connections are tight.

  • Page 7: Test Run Procedure

    Test Run 1. Test Run 1-2. Test Run Procedure Items to Check Before the Test Run Recheck the items to check before the test run. Turn the remote power switch on at least 5 hours before the test, in order to energize the crankcase heater. After performing the leak inspection, applying vacuum, and per- Have the outdoor sub units been connected? forming refrigerant charge for the tubing which is connected on-...

  • Page 8: Setting Of Unit Control Pcb

    Test Run 2. Setting of Unit Control PCB 2-1. Main Outdoor Unit PCB Setting CN003 CN101 CN100 S007 S006 S005 S004 S002 S003 1 - 4...
  • Page 9 Test Run 2. Setting of Unit Control PCB Examples of the No. of indoor units settings (S005, S004) Indoor unit setting (S005) Indoor unit setting (S004) No. of indoor units (3P DIP switch, blue) (Rotary switch, red) 10 20 30 1 unit (factory setting) All OFF Set to 1...

  • Page 10: Auto Address Setting

    Test Run 3. Auto Address Setting 3-1. Auto Address Setting Basic wiring diagram: Example (1) • If link wiring is not used (The inter-unit control wires are not connected to multiple refrigerant systems.) Indoor unit addresses can be set without operating the compressors. No.
  • Page 11 Test Run 3. Auto Address Setting Basic wiring diagram: Example (2) * When multiple outdoor main units exist, remove the socket that is • If link wiring is used used to short-circuit the terminal plug (CN003) from all outdoor No. 1 (main outdoor unit) settings main unit PCBs except for one unit.
  • Page 12 Test Run 3. Auto Address Setting Case 2 Automatic Address Setting (no compressor operation) Indoor and outdoor unit power can be turned ON for each system separately. Indoor unit addresses can be set without operating the compressors. Automatic Address Setting from Outdoor Unit On the No.
  • Page 13 Test Run 3. Auto Address Setting Case 3A Automatic Address Setting in Heating Mode Indoor and outdoor unit power cannot be turned ON for each system separately. In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.
  • Page 14 Test Run 3. Auto Address Setting Case 3B Automatic Address Setting in Cooling Mode Indoor and outdoor unit power cannot be turned ON for each system separately. In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.
  • Page 15 Test Run 3. Auto Address Setting Display during automatic address setting On outdoor main unit PCB Do not short-circuit the automatic address setting pin (CN100) again while automatic address setting is in progress. Doing so will cancel the setting operation and will cause LED 1 and 2 to turn OFF. Blink alternately When automatic address setting has been successfully completed, both LED 1 and 2 turn OFF.

  • Page 16: Remote Controller Test Run Settings

    3. Auto Address Setting Test Run 4. Remote Controller Test Run Settings Request concerning recording the indoor/outdoor unit combination Nos. After automatic address setting has been completed, be sure to record them for future reference. List the outdoor main unit system address and the addresses of the indoor units in that system in an easily visible location (next to the nameplate), using a permanent marking pen or similar means that cannot be abraded easily.

  • Page 17: Caution For Pump Down

    Test Run 5. Caution for Pump Down 5. Caution for Pump Down Pump down means refrigerant gas in the system is returned to the outdoor unit. Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit. This outdoor unit cannot collect more than the rated refrigerant amount as CAUTION...

  • Page 18: Meaning Of Alarm Messages

    Test Run 6. Meaning of Alarm Messages 6. Meaning of Alarm Messages Table of Self-Diagnostics Functions and Description of Alarm Displays Alarm messages are indicated by the blinking of LED 1 and 2 (D72, D75) on the outdoor unit PCB. They are also displayed on the wired remote controller.
  • Page 19 Test Run 6. Meaning of Alarm Messages Alarm Possible cause of malfunction Message Activation of Protective device in indoor unit Thermal protector in indoor unit fan motor is activated. <<P01>> protective is activated. Improper wiring connections of ceiling panel. <<P09>> device Float switch is activated.
  • Page 20 Test Run 6. Meaning of Alarm Messages Alarm messages displayed on system controller Serial Error in transmitting serial Indoor or main outdoor unit is not oparating correctly. communication communication signal Mis-wiring of control wiring between indoor unit, main outdoor unit and errors system controller.

  • Page 21: Section 2: Remote Control Functions

    Remote Control Functions TENTATIVE Contents 2. REMOTE CONTROL FUNCTIONS 1. Main Operating Functions ....................2-2 1-1. Room Temperature Control ...................2-2 1-2. Automatic Control for Heating and Cooling ..............2-3 2. Wireless Remote Controller ....................2-4 2-1. How to Use the Wireless Remote Controller ..............2-4 2-2.

  • Page 22: Main Operating Functions

    Remote Control Functions 1. Main Operating Functions 1-1. Room Temperature Control The thermostat is turned ON/OFF according to T as shown below. T = Room temperature - Set temperature When remote controller sensor Room temperature = Temperature detected by the remote controller sensor is used When body sensor is used Room temperature = Temperature detected by the body sensor - Intake shift temperature*...

  • Page 23: Automatic Control For Heating And Cooling

    Remote Control Functions 1. Main Operating Functions 1-2. Automatic Control for Heating and Cooling Automatic Heating/Cooling Control (1) When operation starts, heating or cooling is selected according to the set temperature and the room temperature. Room temperature Set temperature + 2 Cooling Set temperature –...

  • Page 24: Wireless Remote Controller

    Remote Control Functions 2. Wireless Remote Controller Optional Controller (Remote Controller) Wireless Remote Controller / CZ-RWSU1U (for X Type) / CZ-RWST1U (for A, T Type) / CZ-RWSC1U (for U, D Type) / CZ-RWSK1U (for K Type) / CZ-RWSY1U 2-1. How to Use the Wireless Remote Controller B: Transmitter O: Remote control sensor A: ON/OFF operation button...
  • Page 25 Remote Control Functions 2. Wireless Remote Controller F: FILTER button If a separately installed signal receiver is being employed, this button is used to turn off its filter lamp. When the filter lamp has lighted, first clean the filter, and then press the FILTER button to turn off the filter lamp.
  • Page 26 Remote Control Functions 2. Wireless Remote Controller Indicator when swing operation is stopped Fan and heating Cooling and drying During cooling and drying, the flap does not stop at the downward position. Even if the flap is stopped at the downward position during the swing operation, it does not stop until it moves to the third position from the top.

  • Page 27: Receiver

    Remote Control Functions 2. Wireless Remote Controller 2-2. Receiver The signal receivers with the exception of the separately installed signal receiver are mounted on the indoor units. A, T types X, XM types Separately installed signal receiver (U, D types) K type A: Receiver This section picks up infrared signals from the wireless remote control unit (transmitter).

  • Page 28: Operation

    Remote Control Functions 2. Wireless Remote Controller 2-3. Operation STEP 1, 6 STEP 2 STEP 4 STEP 5 STEP 3 NOTE • To warm up the system, the power mains must be turned on at least five (5) hours before operation. STEP 1 To start the air conditioner: Press the operation button (ON/OFF button).

  • Page 29: Using The Wireless Remote Control Unit

    Remote Control Functions 2. Wireless Remote Controller 2-4. Using the Wireless Remote Control Unit Slide switch This is used to set the operation mode of the indoor units and to set the flaps. • Depending on the indoor unit used, the operation display and airflow direction display settings will differ as shown below.

  • Page 30: Address Settings

    Remote Control Functions 2. Wireless Remote Controller When mounting the • Before mounting the wireless remote control unit on the wall, place the unit at the mounting wireless remote control position, press the ON/OFF operation button and check that the signals are received unit on a wall for use properly.
  • Page 31 Remote Control Functions 2. Wireless Remote Controller Wireless remote control unit address displays …… X type For positions 1, 2 and 3, set the * The address switch knob to the left; conversely, for 4, 5 in the operation Position of and 6, set the knob to the right.

  • Page 32: Emergency Operation

    Remote Control Functions 2. Wireless Remote Controller 2-6. Emergency Operation In any of the following events, use the Emergency operation button to operate the air conditioner on a makeshift basis. • When there is no charge remaining in the wireless remote control unit's batteries •...
  • Page 33 Remote Control Functions 2. Wireless Remote Controller U, D types Initiate operation using the Emergency operation button in the signal receiver. 1. Press the Emergency operation button. The air conditioner initiates a cooling operation when its operation is started up at a room temperature of 75°F or above. Conversely, it initiates a heating operation when its operation is started up at a room temperature below 75°F.

  • Page 34: Trouble Diagnosis

    Remote Control Functions 2. Wireless Remote Controller 2-7. Trouble Diagnosis Check out the following points before requesting service. Trouble Possible Cause Remedy Is the air conditioner in the shutdown mode or Press the wireless remote control unit's The air conditioner was the switch operated after a power failure? ON/OFF operation button again.

  • Page 35: Timer Remote Controller

    Remote Control Functions 3. Timer Remote Controller 3-1. How to Use the Timer Remote Controller Operating buttons Display 15 14 29 26 2 - 15...

  • Page 36: Names And Operations

    Remote Control Functions 3. Timer Remote Controller 3-2. Names and Operations Operation Section (Refer to the previous page) Start/Stop button Ventilation button Pushing this button starts, and pushing again stops the Use this button when you installed a fan available in the market.
  • Page 37 Remote Control Functions 3. Timer Remote Controller Display Section (Refer to the page 2-15) SETTING indication Operation mode change control indication Appears when the timer program is being set. Displays when an operation mode is entered by the re- mote control unit, while another operation mode has been UNIT indication already selected.

  • Page 38: Installation Manual For Timer Remote Controller

    Remote Control Functions 3. Timer Remote Controller 3-3. Installation Manual for Timer Remote Controller Accessories for remote controller switch Remote controller Wood screws Wire joints Operation manual Installation manual (with 8 in. wire) 3-4. How to install the Remote Controller Do not supply power to the unit or try to operate it until the tubing and wiring to the outdoor unit is CAUTION completed.

  • Page 39: Group Control Using 2 Remote Controllers

    Remote Control Functions 3. Timer Remote Controller Use AWG#20 to AWG#16 wires. Provided wire joint (white) Remote controller wiring can be extended to a maximum Remote controller wiring of 1640 ft. (1) Strip the insulation to approximately 35/64" from the ends of the wires that will be connected.
  • Page 40 Remote Control Functions 3. Timer Remote Controller Fig. 2-4 Fig. 2-5 Caution when installing the remote controller *1 Install the remote controller more than 3-3/8" apart from the wall surface. *2 To install the remote controllers side-by-side, keep the space between each for more than 4-59/64". *3 To install the remote controllers one above the other, keep the space between each for more than 1".

  • Page 41: Setting The Present Time

    Remote Control Functions 3. Timer Remote Controller 3-10. Setting the Present Time Press and hold for more than 2 seconds to enter in the present day and time setting mode. Once you enter in the setting mode, , “ ”(day) and “time” fl ash. Set “...

  • Page 42: Weekly Program Function

    Remote Control Functions 3. Timer Remote Controller 3-11. Weekly Program Function Checking Weekly Timer Set the weekly program assigning a given timer to each day of the week. Maximum of 6 programs a day and 42 programs a week can be set. Select the day and the TIMER number you want to program.
  • Page 43 Remote Control Functions 3. Timer Remote Controller Changing the Program Timer To set the weekly program, follow the steps below. Select the program you want to set in the program confi rmation mode, and press . The enters the setting mode of the program currently displayed. * In the program setting mode, , “hour”, “minute”...
  • Page 44 Remote Control Functions 3. Timer Remote Controller 4. Set the program pattern. (program step 3) Pattern 1 There are 4 program patterns. Pressing repeats the following display patterns. Pattern 1 The indoor unit starts operation at the programmed Pattern 2 time.
  • Page 45 Remote Control Functions 3. Timer Remote Controller Deleting the Program Timer To delete the program timer setting, follow the steps below. Press to enter the program confi rmation mode. Press to select the day of the program you want to delete.
  • Page 46 Remote Control Functions 3. Timer Remote Controller Duplicating the Program Timer You can duplicate the preset program by day. Select the copy source. is pressed in program checking mode , it enters the copy mode (Selecting the copy source ) of the pro- gram timer.

  • Page 47: Outing Function

    Remote Control Functions 3. Timer Remote Controller 3-12. Outing Function Outing function is a function that prevents the room temperature from increasing too much (or decreasing too much) when no one is in the room. An air conditioner works automatically if this function is set effective. General Performance of the Outing Function COOL / DRY The air conditioner starts operation when the room temperature increases up to –1°F of the upper limit.
  • Page 48 Remote Control Functions 3. Timer Remote Controller 3-12. Outing Function (Continued) Setting the Outing Function Press and hold for more than 2 seconds to display the upper limit temperature setting screen. and the upper limit temperature start fl ashing. (The default value of the upper limit temperature is 99°F.) Press to select the upper limit temperature and press to fi...

  • Page 49: Sleeping Function

    Remote Control Functions 3. Timer Remote Controller 3-13. Sleeping Function This function leads you to a comfortable sleep and chang- When the off time comes: es the room temperature during your sleep. The indoor unit stops. You can set the off timer every one hour from 1 to 10 * The temperature returns to the setting at the time when hours.

  • Page 50: Wired Remote Controller Test Run Settings

    Remote Control Functions 3. Timer Remote Controller 3-14. Wired Remote Controller Test Run Settings 1. Press the remote controller button for 4 seconds or longer. 2. “TEST” appears on the LCD display while the test run is in progress. 3. Then press the button.

  • Page 51: Simple Settings Function

    Remote Control Functions 3. Timer Remote Controller 3-15. Simple Settings Function • This allows the filter lifetime, operating mode prior- ity change, central control address, and other set- tings to be made for an individual or group-control indoor unit to which the remote controller used for simple settings is connected.
  • Page 52 Remote Control Functions 3. Timer Remote Controller List of Simple Setting Items 0000 Not displayed 0001 150 hours 0002 2,500 hours Filter sign ON time (filter lifetime) 0003 5,000 hours 0004 10,000 hours 0005 Use the filter clogging sensor. 0000 Standard (setting at time of shipping) Degree of filter fouling 0001...

  • Page 53: Detailed Settings Function

    Remote Control Functions 3. Timer Remote Controller 3-16. Detailed Settings Functions • This allows the system address, indoor unit address, and other settings to be made for the individual or group-control indoor unit to which the remote controller used for detailed settings is con- nected.
  • Page 54 Remote Control Functions 3. Timer Remote Controller List of Detailed Setting Items Setting data Item code Item Description Description Description 1-Way Air Discharge 4-Way Air Discharge (Mini) (Slim) Concealed Duct 0001 0000 0005 Semi-Concealed (A) Semi-Concealed (X, XM) (U, UM) Type Concealed Duct High 0006...
  • Page 55 Remote Control Functions 3. Timer Remote Controller Setting data Item Item code Description 0000 0000 5 minutes Forced thermostat ON (1B) time 0001 4 minutes ° ° Cooling discharge ° temperature shift ° 0010 ° ° Heating discharge ° temperature shift °...
  • Page 56 Remote Control Functions 3. Timer Remote Controller Setting data Item Item code Description Normal (Used as optional relay PCB or JEMA 0000 standard HA terminal.) T10 terminal switching 0001 Used for OFF reminder 0002 Fire prevention input 0000 No forced operation 0001 Forced operation for 1 minute Automatic drain pump operation...
  • Page 57 Remote Control Functions 3. Timer Remote Controller Setting data Item Item code Description Smudging reduction mode (Flap swing upper-limit position 0000 is shifted downwards.) Flap swing mode 0001 Normal mode Draft reduction mode (Flap lower-limit position is shifted 0002 shifted upwards.) DC fan tap Purpose operating mode...
  • Page 58 Remote Control Functions 3. Timer Remote Controller Selecting the DC fan motor tap (when setting with the remote controller) <Procedure> Stop the system before performing these steps. Press and hold the buttons simultaneously for 4 seconds or longer. If group control is in effect, press the button and select the address (unit No.) of the indoor unit to set.
  • Page 59 Remote Control Functions 3. Timer Remote Controller Selecting the DC fan motor tap (when setting from the PCB) ● 4-way Air Discharge Semi-Concealed type <Procedure> Stop the system before performing these steps. Open the electrical component box cover, then check the indoor unit control PCB. Connect the jumper connector (2P: yellow) which was supplied with the accessory to the correct connector pin on the indoor unit control PCB according to the setting number which was confirmed in Table 1 (Table of DC Fan Motor Tap Settings).

  • Page 60: Remote Controller Servicing Functions

    Remote Control Functions 3. Timer Remote Controller 3-17. Remote Controller Servicing Functions O p e r a t i o n w i t h P r e s s a n d h o l d t h e b u t t o n T e s t r u n f o r c e d t h e r m o s t a t...
  • Page 61 Remote Control Functions 3. Timer Remote Controller Test Run Function Operates the unit with the thermostat forced ON. <Procedure> Press and hold the button for 4 seconds or longer. “Test” appears on the remote controller LCD display. Start operation. Press the button to return to normal remote controller display.
  • Page 62 Remote Control Functions 3. Timer Remote Controller ■ Sensor Temperature Display Function Sensor Temperature Diaplay (displayed regardless of whether unit is operating or stopped) The procedure below displays the sensor tempera- tures from the remote controller, indoor unit, and out- door unit on the remote controller.

  • Page 63: Section 3: Trouble Diagnosis

    Trouble Diagnosis TENTATIVE Contents 3. TROUBLE DIAGNOSIS 1. Contents of Remote Controller Switch Alarm Display ............3-2 2. Outdoor Unit Control PCB LED Display ................3-4 3. W-3WAY VRF Alarm Codes ....................3-5 4. Blinking (Inspection) Display on the Remote Controller ......... 3-26 3 - 1...

  • Page 64: Contents Of Remote Controller Switch Alarm Display

    Trouble Diagnosis 1. Contents of Remote Controller Switch Alarm Display Blinking: OFF: Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Remote controller is Error in receiving serial communication signal. Serial <E01> Operating detecting error signal from (Auto address is not completed.) communication lamp blinking...
  • Page 65 Trouble Diagnosis 1. Contents of Remote Controller Switch Alarm Display Blinking: OFF: Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Compressor 1 (INV) discharge temp. sensor Outdoor unit Thermistor fault Compressor 2 (constant speed) discharge temp. sensor Outdoor air temp.

  • Page 66: Outdoor Unit Control Pcb Led Display

    Trouble Diagnosis 2. Outdoor Unit Control PCB LED Display : ON : Blinking : OFF) LED (RED) Display meaning After the power is turned ON (and automatic address setting is not in progress), no communication with the indoor units in that system is possible. (Both OFF) After power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are confirmed in that system;...

  • Page 67: W-3Way Vrf Alarm Codes

    Trouble Diagnosis 3. W-3WAY VRF Alarm Codes W-3WAY VRF Trouble Diagnosis Alarm code Alarm meaning Page Outdoor unit failed to receive serial communication signals from indoor unit. Automatic address setting start is prohibited. Automatic address setting alarm (too few units) Automatic address setting alarm (too many units) No indoor units at automatic address setting.
  • Page 68 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes E06 Alarm Alarm code Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit. Outdoor unit failed to receive serial communication signals from indoor unit. Alarm conditions Probable cause (1) The indoor unit power was cut OFF after initial communications were completed. (2) An open circuit or short circuit occurred in the inter-unit control wiring after initial communications were completed.
  • Page 69 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes E16 Alarm Alarm code Alarm meaning Automatic address setting alarm (too many units) Alarm conditions • There were a number of indoor units was too many when Automatic address setting was performed. • After initial communications were completed, an unrecognized unit was detected. Probable cause (1) The SW for setting the number of indoor units is incorrect.
  • Page 70 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes E25 Alarm Alarm code Alarm meaning Outdoor unit address setting failure (duplication) Alarm conditions Communication by the outdoor unit main/sub control wiring was received that contained the same address as that unit 5 times or more within 3 minutes. Probable cause The unit number is set incorrectly.
  • Page 71 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes F04, F05 Alarm Alarm code F04, F05 Alarm meaning F04: Compressor 1 discharge temperature sensor (DISCH1) trouble. F05: Compressor 2 discharge temperature sensor (DISCH2) trouble. Alarm conditions (1) Discharge temp. of 212°F or higher was detected 20 minutes or more after that compressor stopped operating.
  • Page 72 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes (3) Leakage from the discharge tube check valve Check Trouble: Although the other compressor is operating and this compressor is stopped, the discharge temperature of this compressor rises together with the temperature of the other compressor.
  • Page 73 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes Alarm meaning Outdoor air temperature sensor (AIR TEMP) trouble Alarm conditions (1) A/D step is 10 steps or less (short circuit). (2) A/D step is 1014 steps or more (open circuit) Probable cause (1) Sensor malfunction (including connector) (2) PCB malfunction Check...
  • Page 74 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes Check High-pressure sensor failure Check the sensor resistance value. (Use a tester and measure the resistance between sensor No.1 and No.3) Resistance of less than 10k indicates a short circuit or other trouble. Resistance of 10k - 200k is normal.
  • Page 75 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes F17 Alarm Alarm code Alarm meaning Low-pressure sensor (LPS) trouble Alarm conditions (1) Sensor short circuit (2) Sensor open circuit Probable cause (1) Sensor malfunction (including connector) (2) PCB malfunction (1) Measure the sensor resistance. Check that the sensor is operating normally. Check (2) Use a remote monitor or a PC monitor to check the temperature that is recognized by the microcomputer.
  • Page 76 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes H06 Alarm Alarm code Alarm meaning Abnormal low-pressure drop Alarm conditions A pre-trip occurs during the unit’s operation when the low-pressure sensor installed at constant low-pressure parts detects a pressure of 7.25 psi or less continuously for 2 minutes, or an instantaneous pressure of 2.90 psi or less.
  • Page 77 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes H08, H27 Alarm Alarm code H08, H27 Alarm meaning H08: Trouble (open circuit) with the oil sensor (connection) at compressor 1 H27: Trouble (open circuit) with the oil sensor (connection) at compressor 2 Alarm conditions This alarm occurs when a connector connection (pins 1 and 2 for compressor 1, pins 4 and 5 for compressor 2, and pins 7 and 8 for compressor 3) is open.
  • Page 78 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes H11, H12 Alarm Alarm code H11, H12 H11: Compressor 2 (constant speed) overcurrent alarm Alarm meaning H12: Compressor 2 (constant speed) lock current alarm Alarm conditions H11: During operation, the compressor current value exceeded 23.1 A for 30 seconds or longer. However this alarm is not detected for 4 seconds after the compressor starts.
  • Page 79 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes H15 Alarm Alarm code Alarm meaning H15: Compressor 2 discharge temperature sensor (DISCH2) disconnected. Alarm conditions • This alarm occurs when the discharge sensor temperature detector is not inserted into the tube’s sensor holder, or when the sensor itself has suffered some kind of malfunction other than a cut wire.
  • Page 80 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes H07 Alarm Alarm code Alarm meaning No-oil alarm Alarm conditions This alarm occurs when oil does not fl ow for a specifi ed amount of time in tubing where oil fl ow constantly. (The presence of oil is detected by a temperature sensor.) Judgment method: Tcal (calculated by the formula below from the oil temperature) is compared with the discharge temperature.
  • Page 81 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes H31 Alarm Alarm code Alarm meaning HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifies a trouble signal (indicating abnormal HIC temperature or other trouble) from the HIC. The HIC judges the current and temperature, and outputs the trouble signal. In general this indicates trouble with the HIC itself.
  • Page 82 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes L10 Alarm Alarm code Alarm meaning Outdoor unit capacity not set Alarm conditions The outdoor unit capacity has not been set, or the setting is not allowed by the system. Probable cause This alarm occurs because the capacity has not been set. Check Connect the outdoor unit maintenance remote controller.
  • Page 83 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes P03, P17 Alarm Alarm code P03, P17 Alarm meaning P03: Compressor 1 discharge temperature trouble. P17: Compressor 2 discharge temperature trouble. Alarm conditions Pre-trip stop at 222°F (106°C) or higher This alarm occurs when the pre-trip counter reaches 4. However the counter is reset when the compressor has operated continuously for a certain length of time.
  • Page 84 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes Correction (1) Replace the sensor. (2) Replace the outdoor unit PCB. (3) Correct the problem locations. Example All of the probable causes Notes Operates continuously for a set length of time. Indicates 2.5 minutes or longer for an inverter compressor (compressor 1) and 30 seconds or longer for a constant-speed compressor (compressor 2).
  • Page 85 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes P04 Alarm Alarm code Alarm meaning High-pressure switch activated. Alarm conditions When the electrical circuit of the high-pressure switch is activated, then depending on the pressure, the terminals may be short-circuited. If the pressure is 551 psi or higher, the terminals will be short-circuited.
  • Page 86 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes P05 Alarm Alarm code Alarm meaning Reverse phase (or missing phase) detected Alarm conditions This alarm occurs when a reverse phase or missing phase is detected in the L1-L2-L3 phases. Probable cause Reverse phase or missing phase in the L1-L2-L3 phases Check Check the wiring at the power terminal plate.
  • Page 87 Trouble Diagnosis 3. W-3WAY VRF Alarm Codes P22 Alarm Alarm code Alarm meaning Fan motor trouble Alarm conditions Fan motor start failure, fan motor Hall IC input failure Probable cause Possible causes are a Hall IC input circuit failure and a fan HIC failure. Check Check the fan motor wiring, the Hall IC wiring, and the connector connections.

  • Page 88: Blinking (Inspection) Display On The Remote Controller

    Trouble Diagnosis 4. Blinking (Inspection) Display on the Remote Controller Currently the blinking inspection display can be displayed only on the wired remote CAUTION controller and system remote controller. Blinking inspection display (1) (Automatic backup) Alarm code (Blinking inspection display) Alarm meaning Automatic backup is in progress.
  • Page 89 Trouble Diagnosis 4. Blinking (Inspection) Display on the Remote Controller Blinking inspection display (2) (compressor magnet SW seizing detection) (Blinking inspection display) Alarm code Alarm meaning Compressor magnet SW seizing detected Status: The compressor and outdoor unit fan motor continue to run even though all indoor units within that refrigerant tubing system are stopped.
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  • Page 91: Section 4: Pcb And Functions

    PCB and Functions TENTATIVE Contents 4. PCB AND FUNCTIONS 1. Outdoor Unit Control PCB ....................4-2 1-1. Outdoor Unit Control PCB CR-U-96MF1U9 ..............4-2 1-2. Outdoor Unit Filter PCB FIL-CHDX14053 ..............4-3 1-3. Outdoor Unit HIC Board HIC-CHDX14053 ..............4-3 1-4. Functions (for CR-U-96MF1U9) ..................4-4 2.

  • Page 92: Outdoor Unit Control Pcb

    PCB and Functions 1. Outdoor Unit Control PCB 1-1. Outdoor Unit Control PCB CR-U-96MF1U9 S002 S004 S003 S005 A. ADD (CN100) pin OAC (CN105) pin MODE (CN101) pin Alarm LED AP (CN102) pin (LED1, 2) STOP (CN104) pin CHK (CN023) pin RUN (CN103) pin S006 TEST (CN022) pin...

  • Page 93: Outdoor Unit Filter Pcb Fil-Chdx14053

    PCB and Functions 1. Outdoor Unit Control PCB 1-2. Outdoor Unit Filter PCB FIL-CHDX14053 1-3. Outdoor Unit HIC Board HIC-CHDX14053 4 - 3...

  • Page 94: Functions (For Cr-U-96Mf1U9)

    PCB and Functions 1. Outdoor Unit Control PCB 1-4. Functions (for CR-U-96MF1U9) Automatic address setting 2P plug (white): Automatic address setting pin (CN100) • Short-circuit this pin for 1 second or longer to automatically set the addresses at the indoor units that are connected to that outdoor unit and are within the same system.
  • Page 95 PCB and Functions 1. Outdoor Unit Control PCB Terminal plug 3P plug (black): For communications circuit impedance matching • A connecting socket (3P, black) is attached to the terminal plug at the time of shipment from the factory. • In the case of link wiring which combines the inter-unit control wiring for multiple systems into a single communications circuit, leave the connecting socket in place at only one of the outdoor units, and move the socket from the "SHORT"...
  • Page 96 PCB and Functions 1. Outdoor Unit Control PCB Table 1. Setting the System Address [S002: Rotary switch (black), S003: 2P DIP (blue)] S003 setting Outdoor system address S002 setting 1P (10s digit) 2P (20s digit) 1 refrigerant system only Link wiring Table 2.

  • Page 97: Indoor Unit Control Pcb

    PCB and Functions 2. Indoor Unit Control PCB Indoor Unit Control PCB Switches and Functions Indoor unit control PCB T10: 6P plug (yellow): Used for remote control. (Refer to the remote control section.) (CN61) Control items: (1) Start/stop input (2) Remote controller prohibit input (3) Start signal output (4) Alarm signal output EXCT:...

  • Page 98: Ac Fan Motor (For Cr-U-07Mf1U6)

    PCB and Functions 2. Indoor Unit Control PCB 2-1. AC Fan Motor (for CR-S-07MF1U6) OC (CN040) EEPROM (IC010) EMG (CN044) VARISTOR (VA100) JP001 OPTION (CN060) EXCT (CN073) GRL (CN020) DISP (CN072) HEATER (CN304) POWER LED (D002) CHK (CN071) FAN DRIVE (CN032) FILTER (CN070) T10 (CN061) Some models do not correspond to target products depending on the year of production.

  • Page 99: Xm Type (For Cr-S-12My1U6, Pow-Xm075Xh)

    PCB and Functions 2. Indoor Unit Control PCB 2-3. XM Type (for CR-S-12MY1U6, POW-XM075XH) EXCT (CN073) POWER LED FILTER (D002) (CN070) (CN062) HEATER DISP (CN340) (CN063) (CN061) TEST OPTION (CN064) (CN060) JP001 EEPROM memory IC FAN DRIVE JP003 (CN032) (CN044) (CN040) CR-XMHX1252 POW-XM075XH...

  • Page 100: Cr1 (For Cr-Kr74Gxh56A/S-07Mk1U6~S-12Mk1U6) (Wall-Mounted)

    PCB and Functions 2. Indoor Unit Control PCB 2-4. CR1 (for CR-KR74GXH56A/S-07MK1U6~S-12MK1U6) (Wall-Mounted) If the fuse (F002) has CHK (test) pin blown, determine the DISP pin cause and correct it. Then change the socket from the OC plug to the EMG plug.

  • Page 101: Cr1 (For Cr-Kr254Gxh56A/S-18Mk1U6~S-24Mk1U6) (Wall-Mounted)

    PCB and Functions 2. Indoor Unit Control PCB 2-5. CR1 (for CR-KR254GXH56A/S-18MK1U6~S-24MK1U6) (Wall-Mounted) If the fuse (F002) has blown, determine the CHK (test) pin cause and correct it. DISP pin Then change the socket from the OC plug to the EMG plug.

  • Page 102: Cr2 (For Pow-Kh2672R/S-07Mk1U6~S-24Mk1U6) (Wall-Mounted)

    PCB and Functions 2. Indoor Unit Control PCB 2-6. CR2 (for POW-KH2672R/S-07MK1U6~S-24MK1U6) (Wall-Mounted) Control circuit fuse Control circuit fuse (F201) (F202) TRANS-S plug (CN202) T20 plug Some models do not correspond to target products depending on the year of production. 4 - 12...

  • Page 103: Explanation Of Functions

    PCB and Functions 2. Indoor Unit Control PCB 2-7. Explanation of Functions 6P plug (yellow): Used for remote control. Control items: ①Start/stop input ②Remote controller prohibit input (CN061) ③Start signal output ④Alarm signal output (Remote control operation) (Condition) ① 1-2 (Pulse input): Unit ON/OFF condition switching with a pulse signal. (1 pulse signal: shortage status more than 300msec.or more) ②...
  • Page 104 PCB and Functions 2. Indoor Unit Control PCB EXCT 2P plug (red): Can be used for demand control. When input is present, forces the unit to (CN009) operate with the thermostat OFF. Examples of wiring * Lead wire with 2P plug (special-order part: WIRE K/623 174 4263) Relay (field supply) EXCT Relay coil signal...
  • Page 105 PCB and Functions 2. Indoor Unit Control PCB OPTION 6P (white): Outputs external signals as shown in the fi gure below. (CN014) Relay (DC 12V, field supply) (Note) Fan signal OPTION (white) Heat start signal DC 12V Cool start signal Indoor unit control PCB (CR1) Thermostat signal Defrost signal...

  • Page 106: Explanation Of Functions (Cr-Kxrp56An, Cr-Kxrp80An, Pow-Krp50A)

    PCB and Functions 2. Indoor Unit Control PCB 2-8. Explanation of Functions (CR-KXRP56AN, CR-KXRP80AN, POW-KRP50A) 6P fl ag (yellow): Used for remote control. (CN105) Control items: Start/stop input Remote controller prohibit input (for remote control) Start signal output Alarm signal output EXCT 2P plug (red): Can be used for demand control.
  • Page 107 PCB and Functions 2. Indoor Unit Control PCB OPTION 6P (white): Outputs external signals as shown in the fi gure below. (CN014) Relay (DC 12V, field supply) (Note) Fan signal OPTION (white) Heat start signal DC 12V Cool start signal Indoor unit control PCB (CR1) Thermostat signal Defrost signal...

  • Page 108: Instructions For Connecting External Heater To Vrf Indoor Units

    PCB and Functions 2. Indoor Unit Control PCB 2-9. Instructions for Connecting External Heater to VRF Indoor Units By using the heater-driving signal of the indoor unit Control PCB, the external heater can be controlled as a united heating system with the indoor unit.
  • Page 109 PCB and Functions 2. Indoor Unit Control PCB The output signal is 12V DC. ("1" is "+" and "2" is "-".) A mistake in polarity while connecting might cause damage to both heater side and the PCB of the indoor unit. When installing the heater, be sure to turn OFF the power to the indoor unit.
  • Page 110 PCB and Functions 2. Indoor Unit Control PCB The following charts show the drawings of the wiring layout of the heater output signal. Install the connector for the output (part code: 623 312 1390) to the location marked with CN304 or CN340. Install the wiring connection into the electrical component box.
  • Page 111 PCB and Functions 2. Indoor Unit Control PCB Model : S-**MU Field supply Part code : 623 312 1390 CN340 Model : S-**MY Part code : 623 312 1390 CN340 Field supply Model : S-**MD, S-**MT Field supply CN340 Part code : 623 312 1390 Model : S-**MM Part code : 623 312 1390...
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  • Page 113: Self-Diagnosis Function Table

    Self-Diagnosis Function Table TENTATIVE Contents 5. SELF-DIAGNOSIS FUNCTION TABLE 1. Self-Diagnosis Function Table ...................5-2 5 - 1...
  • Page 114 Self-Diagnosis Function Table 1. Self-Diagnosis Function Table 1. Self-Diagnosis Function Table • Causes and corrections in instances when automatic address setting cannot be started Trouble Cause and correction The power LED (D53) on the outdoor unit control PCB does not turn ON. Check for any errors in the power wiring to the outdoor unit, and check for a missing phase.
  • Page 115 Self-Diagnosis Function Table 1. Self-Diagnosis Function Table Check items Check that the indoor unit power is turned ON. Check that the inter-unit control wiring is connected correctly. (Check that there are no open circuits, short circuits, terminal plugs, incorrect wiring to the remote controller terminals, or similar problems.) Check that the remote controller wiring is connected correctly.
  • Page 116 Self-Diagnosis Function Table 1. Self-Diagnosis Function Table • The outdoor unit maintenance remote controller can be used to check the alarm display. The number of times that LED 1 and 2 blink on the outdoor unit control PCB can be used to check the alarm display. (Refer to “Checking the LED 1 and 2 Alarm Display on the Outdoor Unit Control PCB.”) Alarm code Alarm meaning...

  • Page 117: Section 6: Service Checker

    Service Checker TENTATIVE Contents 6. SERVICE CHECKER 1. Outdoor Unit Maintenance Remote Controller ..............6-2 1-1. Over View ........................6-2 1-2. Functions ........................6-2 1-3. Ordinary Display Controls and Functions ..............6-3 1-4. Monitoring Operations ....................6-7 1-5. Outdoor Unit Alarm History Monitor ................6-8 1-6. Setting the Outdoor Unit EEPROM Data ...............6-9 6 - 1...

  • Page 118: Outdoor Unit Maintenance Remote Controller

    Service Checker 1. Outdoor Unit Maintenance Remote Controller 1-1. Overview About the outdoor unit maintenance remote controller The outdoor unit utilizes non-volatile memory (EEPROM) on its PCB. This allows EEPROM data to replace the setting switches that were present on previous PCBs. The outdoor unit maintenance remote controller is used to set and change these EEPROM data.

  • Page 119: Ordinary Display Controls And Functions

    Service Checker 1. Outdoor Unit Maintenance Remote Controller ■ Temperature monitor Displays the temperature from each indoor/outdoor sensor. ■ Outdoor unit alarm history monitor Displays the outdoor unit alarm history. ■ Setting the outdoor unit EEPROM data Settings mode 1 and settings mode 2 can be used to make outdoor unit EEPROM data settings. 1-3.
  • Page 120 Service Checker 1. Outdoor Unit Maintenance Remote Controller Display (functions) ● The item codes can be changed with the buttons. Item code Item Remarks Outdoor unit alarm Alarm code display No. of connected indoor units Quantity Unit Nos. of connected indoor unit 7-segment display Operating status of indoor unit 7-segment display...
  • Page 121 Service Checker 1. Outdoor Unit Maintenance Remote Controller XX-YY R.C. Displays the outdoor unit sub-bus address which is currently selected. XX = Outdoor unit system address (1 – 30) YY = Outdoor unit address (1 – 2) The locations where are displayed as shown on Fig.
  • Page 122 Service Checker 1. Outdoor Unit Maintenance Remote Controller Concerning the 7-segment 4-digit display of remote controller timer time The unit Nos. of connected units are indicated by four 7-segment digits and a colon. Display of unit Nos. 1 Meaning of colon 1 –...

  • Page 123: Monitoring Operations

    Service Checker 1. Outdoor Unit Maintenance Remote Controller 1-4. Monitoring Operations Display the indoor unit and outdoor unit sensor temperatures. <Operating procedure> Press and hold the (CHECK) and (CANCEL) buttons simultaneously for 4 seconds or longer to engage temperature monitor mode. During temperature monitoring, displays.

  • Page 124: Outdoor Unit Alarm History Monitor

    Service Checker 1. Outdoor Unit Maintenance Remote Controller 1-5. Outdoor Unit Alarm History Monitor Recalls and displays the outdoor unit alarm history. • This is for the outdoor unit only. Indoor unit alarms cannot be recalled. • The indoor unit alarm history can be viewed on the indoor unit remote controller or other controller.

  • Page 125: Setting The Outdoor Unit Eeprom Data

    Service Checker 1. Outdoor Unit Maintenance Remote Controller 1-6. Setting the Outdoor Unit EEPROM Data This function is used to make the outdoor unit EEPROM data settings. Setting mode 1 Press the (CHECK) button and the (VENTILATION) button simultaneously for 4 sec- onds or longer.
  • Page 126 Service Checker 1. Outdoor Unit Maintenance Remote Controller Setting mode 2 Press the (CHECK) button, (SET) button and the (CANCEL) button simultane- ously for 4 seconds or longer. Press the temperature setting buttons to change the item code. The item codes and setting data are shown in the table below.
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