Service Manual
Table Of Contents
- SERVICE MANUAL
- 1. GENERAL INFORMATION
- 2. TECHNICAL DATA AND PARTS LIST
- 3. TROUBLESHOOTING
- 1. Error code
- 2. Troubleshooting with error code
- 2-1. E: 11. Serial communication error (Serial reverse transfer error) (Outdoor unit)
- 2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit)
- 2-3. E: 12. Wired remote controller communication error (Indoor unit)
- 2-4. E: 18. External communication error (Indoor unit)
- 2-5. E: 32. Indoor unit main PCB error (Indoor unit)
- 2-6. E: 35. MANUAL AUTO button error (Indoor unit)
- 2-7. E: 41. Room temperature sensor error (Indoor unit)
- 2-8. E: 42. Indoor unit heat exchanger sensor error (Indoor unit)
- 2-9. E: 51. Indoor unit fan motor error (Indoor unit)
- 2-10. E: 58. Intake grille error (Indoor unit)
- 2-11. E: 62. Outdoor unit main PCB error (Outdoor unit)
- 2-12. E: 63. Inverter error (Outdoor unit)
- 2-13. E: 64. PFC circuit error (Outdoor unit)
- 2-14. E: 71. Discharge thermistor error (Outdoor unit)
- 2-15. E: 73. Outdoor unit heat exchanger thermistor error (Outdoor unit)
- 2-16. E: 74. Outdoor temperature thermistor error (Outdoor unit)
- 2-17. E: 84. Current sensor error (Outdoor unit)
- 2-18. E: 94. Trip detection (Outdoor unit)
- 2-19. E: 95. Compressor motor control error (Outdoor unit)
- 2-20. E: 97. Outdoor unit fan motor error (Outdoor unit)
- 2-21. E: 99. 4-way valve error (Outdoor unit)
- 2-22. E: A1. Discharge temperature error (Outdoor unit)
- 3. Troubleshooting without error code
- 4. Troubleshooting with error code (For wireless LAN adapter)
- 4-1. E: 18. External communication error between indoor unit and WLAN adapter
- 4-2. Wireless LAN adapter error
- 4-3. Network communication error between wireless LAN router and WLAN adapter
- 4-4. E: 18. Communication error
- 4-5. E: 18. Wireless LAN adapter non-energized
- 4-6. Wireless LAN adapter Sleep mode (Indoor unit)
- 4-7. Mobile app setting method
- 5. Service parts information
- 6. Thermistor resistance values
- 4. CONTROL AND FUNCTIONS
- 1. Compressor frequency control
- 2. Auto changeover operation
- 3. Fan control
- 4. Louver control
- 5. Timer operation control
- 6. Defrost operation control
- 7. Various control
- 7-1. Auto restart
- 7-2. MANUAL AUTO operation
- 7-3. Forced cooling operation
- 7-4. 10 °C HEAT operation
- 7-5. ECONOMY operation
- 7-6. POWERFUL operation
- 7-7. Compressor preheating
- 7-8. Electronic expansion valve control
- 7-9. Prevention to restart for 3 minutes (3 minutes st)
- 7-10. 4-way valve control
- 7-11. Outdoor unit low noise operation
- 8. Various protections
- 5. FILED WORKING
7) Remote controller custom code
(Only for wireless remote controller)
The indoor unit custom code can be changed. Select the appropriate custom code.
Function number Setting value Setting description Factory setting
44
00 A ♦
01 B
02 C
03 D
8) External input control
"Operation/Stop" mode or "Forced stop" mode can be selected.
Function number Setting value Setting description Factory setting
46
00 Operation/Stop mode 1 (R.C. enabled) ♦
01 (Setting prohibited)
02 Forced stop mode
03 Operation/Stop mode 2 (R.C. disabled)
9) Room temperature sensor switching (Aux.)
To use the temperature sensor on the wired remote controller only, change the setting to "Wired re-
mote controller" (01).
This function will only work if the function setting 42 is set at "Both" (01).
When the setting value is set to "Both" (00), more suitable control of the room temperature is possi-
ble by setting function setting 30 and 31 too.
Function number Setting value Setting description Factory setting
48
00 Both ♦
01 Wired remote controller
10) Indoor unit fan control for energy saving for cooling
Enables or disables the power-saving function by controlling the indoor unit fan rotation when the
outdoor unit is stopped during cooling operation.
Function number Setting value Setting description Factory setting
49
00 Disable
01 Enable
02 Remote controller ♦
00: When the outdoor unit is stopped, the indoor unit fan operates continuously following the setting
on the remote controller.
01: When the outdoor unit is stopped, the indoor unit fan operates intermittently at a very low speed.
02: Enable or disable this function by remote controller setting.
NOTES:
• As the factory setting, this setting is initially invalidated.
• Set to "00" or "01" when connecting a remote controller that cannot set the Fan control for ener-
gy saving function or connecting a network converter.
To confirm if the remote controller has this setting, refer to the operating manual of each remote
controller.
1-1. Function settings by using remote controller
- (05-6) - 1. Function settings
FIELD
WORKING
FIELD
WORKING