Panasonic U-36LE1U6 Service Manual
Mini vrf system (r410a)
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TEST RUN SERVICE MANUAL
Model No.
Outdoor Units
Class
U-36LE1U6
Model Name
U-36LE1U6E*
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).
85464849298000
36
52
U-52LE1U6
U-52LE1U6E*
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
MINI 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-18MP1U6
S-24MP1U6
S-18MR1U6
S-24MR1U6
24
36
48
S-36MU1U6
S-36MF1U6
S-48MF1U6
S-54MF1U6
S-36ME1U6
S-48ME1U6
SM830198-00
REFERENCE NO.
Section
1
2
3
54
4
5
6
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Table of Contents
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Summary of Contents for Panasonic U-36LE1U6
- Page 1 TEST RUN SERVICE MANUAL MINI VRF SYSTEM Section Model No. Outdoor Units Class U-36LE1U6 U-52LE1U6 Model Name U-36LE1U6E* U-52LE1U6E* Refrigerant R410A is used in the outdoor units. * Salt-Air Damage Resistant Specifications. Indoor Units Class 4-Way Cassette S-12MU1U6 S-18MU1U6 S-24MU1U6 S-36MU1U6 4-Way Cassette 60×60...
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Page 2: Special Precautions
IMPORTANT! Please Read Before Starting This air conditioning system meets strict safety and oper- When Installing… ating standards. As the installer or service person, it is an Select an installation location which is rigid and strong important part of your job to install or service the system so enough to support or hold the unit, and select a location it operates safely and efficiently. -
Page 3: Check Of Density Limit
• Do not touch the air inlet or the When Servicing CAUTION sharp aluminum fins of the • Turn the power OFF at the main power box (mains) outdoor unit. You may get injured. before opening the unit to check or repair electrical •... -
Page 4: Precautions For Installation Using New Refrigerant
Precautions for Installation Using New Refrigerant 1.Care regarding tubing 1-1.Process tubing Material:Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless Pipes and Tubes.” Tubing size:Be sure to use the sizes indicated in the table below. Use a tube cutter when cutting the tubing, and be sure to remove any flash.This also applies to distribution joints (optional). - Page 5 3-2.Use R410A exclusive cylinder only. Valve Single-outlet valve (with siphon tube) Liquid refrigerant should be recharged with the cylinder standing on end as shown. Liquid New refrigerant R410A cannot be used for earlier models 1.Compressor specifications are different. If recharging a R22 or R407C compressor with R410A, durability will significantly decrease since some of the materials used for compressor parts are different.
- Page 6 CONTENTS Section 1 : TEST RUN ......................1. Test Run ......................2. Setting of Unit Control PCB ................3. Auto Address Setting ..................4. Remote Controller Test Run Settings ............1-12 5. Caution for Pump Down ................1-13 6. Meaning of Alarm Messages ................ 1-13 Section 2 : REMOTE CONTROL FUNCTIONS...
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Page 7: Table Of Contents
Test Run 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. Outdoor Unit PCB Setting ....................1-4 3. Auto Address Setting ......................1-6 3-1. Auto Address Setting .....................1-6 4. -
Page 8: Test Run
Test Run 1. Test Run 1-1. Preparing for Test Run ● Before attempting to start the air conditioner, check the following. (1) All loose matter is removed from the cabinet, especially steel filings, bits of wire, and clips. (Power must be turned ON at least 5 hours before (2) The control wiring is correctly connected and all attempting test run) -
Page 9: Test Run Procedure
Test Run 1. Test Run 1-2. Test Run Procedure Items to Check Before the Test Run 1. Turn the remote power switch on at Recheck the items to check before the test run. least 5 hours before the test, in order to energize the crankcase heater. -
Page 10: Setting Of Unit Control Pcb
Test Run 2. Setting of Unit Control PCB 2-1. Outdoor Unit PCB Setting CN33 CN51 CN50 S003 S002 D043 (LED2) S004 D042 (LED1) 1 - 4... - Page 11 Test Run 2. Setting of Unit Control PCB Examples of the No. of indoor units settings Indoor unit setting (S004) No. of indoor units (Rotary switch, red) 1 unit (factory setting) Set to 1 2 units Set to 2 9 units Set to 9 Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used) System address (S003)
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Page 12: 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 13 Test Run 3. Auto Address Setting Basic wiring diagram: Example (2) • If link wiring is used • If link wiring is used * When multiple outdoor units exist, remove the socket that is used to short-circuit the terminal plug (CN33) from all outdoor unit PCBs except for 1.
- Page 14 Test Run 3. Auto Address Setting Case 1 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 1.
- Page 15 Test Run 3. Auto Address Setting Case 2 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 16 Test Run 3. Auto Address Setting Case 3 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 17 Test Run 3. Auto Address Setting Display during automatic address setting ● On outdoor unit PCB * Do not short-circuit the automatic address setting pin (CN51) 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.
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Page 18: Remote Controller Test Run Settings
Test Run 3. Auto Address Setting 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 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 erased easily. -
Page 19: Caution For Pump Down
Test Run 5. Caution for Pump Down 6. Meaning of Alarm Messages 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. -
Page 20: Meaning Of Alarm Messages
Test Run 6. Meaning of Alarm Messages Alarm Possible cause of malfunction message This alarm message shows when the indoor unit for multiple-use Serial Improper setting. is not connected to the outdoor unit. communication errors Duplication of main indoor unit address setting in group control. <L03>... - Page 21 Remote Control Functions Contents 2. REMOTE CONTROL FUNCTIONS 1. Main Operating Functions 2. Wireless Remote Controller 3. Timer Remote Controller * Refer to the 2WAY VRF SYSTEM TEST RUN SERVICE MANUAL (SM830200) 2 - 1...
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Page 23: Section 3 : Trouble Diagnosis
Trouble Diagnosis Contents 3. TROUBLE DIAGNOSIS 1. Contents of Remote Controller Switch Alarm Display ............3-2 2. Outdoor Unit Control Panel LED Display .................3-4 3. Remote Controller Servicing Functions ................3-5 4. Mini VRF Alarm Codes .......................3-7 5. Inspection of Parts (Outdoor Unit) ..................3-17 3 - 1... -
Page 24: Trouble Diagnosis
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 Error in receiving serial communication signal. Remote controller is Serial (Signal from main indoor unit in case of group control) <E01>... -
Page 25: Trouble Diagnosis
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 Outdoor unit Outdoor air temp. sensor (T0) Thermistor Operating and timer fault Heat exchanger 1 liquid temp. sensor (C1) lamps blinking alternately Compressor intake temp. -
Page 26: Outdoor Unit Control Panel Led Display
Trouble Diagnosis Trouble Diagnosis 2. Outdoor Unit Control Panel LED Display 2. Outdoor Unit Control Panel LED Display : ON : Blinking : OFF ) Display meaning D042(1) D043(2) After the power is turned ON (and automatic address setting is not in progress), no communica- tion with the indoor units in that system is possible. -
Page 27: Remote Controller Servicing Functions
Trouble Diagnosis 3. Remote Controller Servicing Functions Sensor temperature display function (displayed both when unit is running and stopped) • Use the following check procedure to display the sensor temperatures from the remote controller, indoor unit, and outdoor unit sensors on the remote controller display. <Check procedure>... -
Page 28: Outdoor Unit Maintenance Remote Controller
Trouble Diagnosis Trouble Diagnosis 3. Remote Controller Servicing Functions 3. Remote Controller Servicing Functions • 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 “... -
Page 29: Mini Vrf Alarm Codes
Trouble Diagnosis 4. Mini VRF Alarm Codes E06 alarm Alarm code Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit. Alarm conditions No serial communications from indoor unit 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 30 Trouble Diagnosis 4. Mini VRF Alarm Codes E16 alarm Alarm code Alarm meaning Automatic address setting alarm (too many units) Alarm conditions The 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 number of indoor unit setting SW (S004) on the outdoor unit PCB is too small.
- Page 31 Trouble Diagnosis 4. Mini VRF Alarm Codes F04 alarm Alarm code Alarm meaning Compressor 1 discharge temperature sensor trouble Alarm conditions (1) A temperature of 212°F (100°C) or higher was detected 20 minutes or longer after that compressor stopped running. (2) Temperature is 176°F (80°C) or higher when the outdoor unit has been stopped for 60 minutes or longer.
- Page 32 Trouble Diagnosis 4. Mini VRF Alarm Codes F07 alarm Alarm code Alarm meaning Liquid temperature sensor (C1) trouble at outdoor heat exchanger 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...
- Page 33 Trouble Diagnosis 4. Mini VRF Alarm Codes F16 alarm Alarm code Alarm meaning High-pressure sensor trouble Alarm conditions The saturation temperature at the detected pressure is 10 °F (5 °C) or more below the highest indoor-unit E1 temperature continuously for 30 minutes. (1) High-pressure sensor malfunction Probable cause (2) Failure to connect the connector to the outdoor unit PCB...
- Page 34 Trouble Diagnosis 4. Mini VRF Alarm Codes F31 alarm Alarm code Outdoor unit non-volatile memory (EEPROM) trouble Alarm meaning (1) Non-volatile memory is not present when power initialization occurs. Alarm conditions (2) Read values do not match after writing to non-volatile memory is complete. (1) Memory was not inserted after the PCB was replaced.
- Page 35 Trouble Diagnosis 4. Mini 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. Probable cause The HIC judges the current and temperature, and outputs the trouble signal.
- Page 36 Trouble Diagnosis 4. Mini VRF Alarm Codes L05 alarm Alarm code Alarm meaning ndoor unit priority duplication (at priority indoor units) Alarm conditions More than 1 indoor unit set for priority was detected. Probable cause More than 1 indoor unit is set for priority. Check From the wired remote controller, use the indoor unit EEPROM simple setting mode and check that the value of item code 04 is “0001.”...
- Page 37 Trouble Diagnosis 4. Mini VRF Alarm Codes L18 alarm Alarm code Alarm meaning 4-way valve operation failure Alarm conditions During heating, when 2 minutes and 30 seconds have elapsed after compressor operation started, the temperature difference between the outdoor air temperature sensor and the heat exchanger liquid temperature sensor (C1) is 40 °F (20 °C) or higher.
- Page 38 Trouble Diagnosis Trouble Diagnosis 4. Mini VRF Alarm Codes 4. Mini VRF Alarm Codes P16 alarm Alarm code Alarm meaning Inverter compressor overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency of less than 80 Hz after start (when trouble judgment current is detected in the primary or secondary current, or when an instantaneous secondary current of 48 A or higher is detected).
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Page 39: Inspection Of Parts (Outdoor Unit)
Trouble Diagnosis 5. Inspection of Parts (Outdoor Unit) (1) Electronic control valve (MOV1) • MOV1: Measure the voltage between plug pin 5 and pins 1 through 4 at the CN41 connector (6P, white) on the outdoor unit control PCB. (Because of the pulse output, a simplified measurement method is used. Set the tester to the 12 V range;... - Page 40 – MEMO – 3 - 18...
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Page 41: Section 4 : Pcb And Functions
PCB and Functions Contents 4. PCB AND FUNCTIONS 1. Outdoor Unit Control PCB ....................4-2 1-1. Outdoor Unit Control PCB CR-CHX06052 ..............4-2 1-2. Functions (for CR-CHX06052) ..................4-3 2. Indoor Unit Control PCB * Refer to the 2WAY VRF SYSTEM TEST RUN SERVICE MANUAL (SM830200) 4 - 1... - Page 42 PCB and Functions 1. Outdoor Unit Control PCB 1-1. Outdoor Unit Control PCB CR-CHX06052 4 - 2...
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Page 43: Outdoor Unit Control Pcb
PCB and Functions 1. Outdoor Unit Control PCB 1-2. Functions (for CR-CHX06052) CN51 2P plug (black): Automatic address setting pin • If the system address switch (S002: Factory setting is 0) is set to other than 0 (centralized control), press this switch once to automatically set the address of the indoor unit to the connected outdoor unit within the same system. - Page 44 PCB and Functions 1. Outdoor Unit Control PCB CN15 The control operations that are shown below are when you short-circuit this cooling inspection pin located on the outdoor unit control PCB. 1.Thermistor inspection Detection results Thermistor Normal Error Discharge temperature (TD) LED1 lights up Outdoor temperature (TO) LED2 lights up...
- Page 45 PCB and Functions 1. Outdoor Unit Control PCB Table 4-1. Setting the System Address [S002: Rotary switch (black), S003: 2P DIP (green or blue)] S003 setting S002 setting Outdoor (System system address (10s (20s address No. switch) digit) digit) refrigerant system only Outdoor...
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Page 47: Section 5 : Self-Diagnostics Function Table
Self-Diagnostics Function Table Contents 5. SELF-DIAGNOSTICS FUNCTION TABLE 1. Self-Diagnostics Function Table ..................5-2 5 - 1... - Page 48 Self-Diagnostics Function Table 1. Self-Diagnostics Function Table 1. Self-Diagnostics Function Table • Causes and corrections in instances when automatic address setting cannot be started Trouble Cause and correction The power LED 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 49 Self-Diagnostics Function Table 1. Self-Diagnostics 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.
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Page 51: Section 6 : Service Checker
Service Checker Contents 6. SERVICE CHECKER 1. Outdoor Unit Maintenance Remote Controller ..............6-2 1. Overview ...........................6-2 2. Functions ...........................6-2 3. Ordinary Display Controls and Functions ................6-3 4. Monitoring Operations .......................6-7 5. Outdoor Unit Alarm History Monitor ..................6-8 6. Setting the Outdoor Unit EEPROM Data ................6-9 6 - 1... -
Page 52: Service Checker
Service Checker 1. Outdoor Unit Maintenance Remote Controller 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 mainte- nance remote controller is used to set and change these EEPROM data. -
Page 53: 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. 3. - Page 54 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 55 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 – 4) The locations where are displayed as shown on Fig.
- Page 56 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 –...
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Page 57: Monitoring Operations
Service Checker 1. Outdoor Unit Maintenance Remote Controller 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 58: Outdoor Unit Alarm History Monitor
Service Checker 1. Outdoor Unit Maintenance Remote Controller 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 59: Setting The Outdoor Unit Eeprom Data
Service Checker 1. Outdoor Unit Maintenance Remote Controller 6. Setting the Outdoor Unit EEPROM Data This function is used to make the outdoor unit EEP- ROM data settings. Setting mode 1 Press the (CHECK) button and the (VENTILATION) button simultaneously for 4 seconds or longer. - Page 60 Service Checker 1. Outdoor Unit Maintenance Remote Controller Setting mode 2 Press the (CHECK) button, (SET) button and the (CANCEL) button simultaneously 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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