LMAS Service Manual
Table Of Contents
- SERVICE MANUAL
- 1. GENERAL INFORMATION
- 2. TECHNICAL DATA AND PARTS LIST
- 3. TROUBLESHOOTING
- 1. Error code
- 1-1. How to check the error memory
- 1-2. How to erase the error memory
- 1-3. Error code table (Indoor unit and wired remote controller)
- 1-4. Error code table (Outdoor unit)
- 1-5. Error code table (Wireless LAN indicator)
- 1-6. Error code table (Mobile app)
- 1-7. Error message for wireless LAN control (Mobile app)
- 2. Troubleshooting with error code
- 2-1. E: 11.X. Serial communication error (Serial reverse transfer error) (Outdoor unit)
- 2-2. E: 11.X. Serial communication error (Serial forward transfer error) (Indoor unit)
- 2-3. E: 12.X. Wired remote controller communication error (Indoor unit)
- 2-4. E: 18.X. External communication error (Indoor unit)
- 2-5. E: 23.X. Combination error (Outdoor unit)
- 2-6. E: 26.X. Address setting error in wired remote controller (Indoor unit)
- 2-7. E: 29.X. Connected unit number error (Indoor unit)
- 2-8. E: 32.X. Indoor unit main PCB error (Indoor unit)
- 2-9. E: 35.X. MANUAL AUTO button error (Indoor unit)
- 2-10. E: 3A.X. Indoor unit communication circuit error (Indoor unit)
- 2-11. E: 41.X. Room temperature sensor error (Indoor unit)
- 2-12. E: 42.X. Indoor unit heat exchanger sensor error (Indoor unit)
- 2-13. E: 51.X. Indoor unit fan motor error (Indoor unit)
- 2-14. E: 58.X. Intake grille error (Indoor unit)
- 2-15. E: 62.X. Outdoor unit main PCB error (Outdoor unit)
- 2-16. E: 63.X. Inverter error (Outdoor unit)
- 2-17. E: 64.X. PFC circuit error (Outdoor unit)
- 2-18. E: 65.X. Trip terminal L error (Outdoor unit)
- 2-19. E: 71.X. Discharge thermistor error (Outdoor unit)
- 2-20. E: 73.X. Heat exchanger (Middle/Outlet) temperature thermistor error (Outdoor unit)
- 2-21. E: 74.X. Outdoor temperature thermistor error (Outdoor unit)
- 2-22. E: 77.X. Heat sink thermistor error (Outdoor unit)
- 2-23. E: 84.X. Current sensor error (Outdoor unit)
- 2-24. E: 86.X. High pressure switch error (Outdoor unit)
- 2-25. E: 86.X. Pressure sensor error (Outdoor unit)
- 2-26. E: 94.X. Trip detection (Outdoor unit)
- 2-27. E: 95.X. Compressor motor control error (Outdoor unit)
- 2-28. E: 97.X. Outdoor unit fan motor error (Outdoor unit)
- 2-29. E: 99.X. 4-way valve error (Outdoor unit)
- 2-30. E: A1.X. Discharge temperature error (Outdoor unit)
- 2-31. E: A5.X. Low pressure error (Outdoor unit)
- 2-32. E: AC.X. Heat sink temperature error (Outdoor unit)
- 3. Troubleshooting without error code
- 4. Troubleshooting with error code (For wireless LAN adapter)
- 4-1. E: 18.X. 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.X. Communication error
- 4-5. E: 18.X. 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
- 1. Error code
- 4. CONTROL AND FUNCTIONS
- 1. Rotation number control of compressor
- 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. MIN. HEAT operation
- 7-5. ECONOMY operation
- 7-6. POWERFUL operation
- 7-7. Fresh air control
- 7-8. Compressor preheating
- 7-9. External electrical heater control
- 7-10. Electronic expansion valve control
- 7-11. Prevention to restart for 3 minutes (3 minutes st)
- 7-12. 4-way valve control
- 7-13. Peak cut operation
- 7-14. Unit status monitoring and the detected value indication
- 8. Various protections
- 5. FILED WORKING
- BACK COVER
7-13. Peak cut operation
The current value is limited to reduce the power consumption by external input.
Peak cut level Level 1 Level 2 Level 3 Level 4
Peak cut for rated capacity
Forced thermostat
off
50% 75% 100%
NOTES:
• During defrost operation, peak cut operation becomes invalid.
• Even during the peak cut operation, the operations of current overload, economy, and low noise
are effective and the outdoor unit operates by lowest current of them.
7-14. Unit status monitoring and the detected value indication
The wired remote controller can monitor the indoor and outdoor units' status and display the detect-
ed result as a relevant ID.
For details of the display method, refer to the Chapter of “Display Sensor Values” in the Installation
Manual of →ired remote controller (Touch panel).
The status can be monitored and displayed on the wired remote controller by assigning an arbitrary
ID. For available ID list, refer to the table below.
NOTE: Operating time for each part cannot be reset when the part is replaced. Take notes of the
operating time before replacing to count the operating time of the replaced part.
Available Sensor ID
Sensor ID Item Unit Remarks
00: Indoor unit
00 000 Suction temp. 01: °F or °C
00 001 Room temp. 01: °F or °C
→hen the wired remote controller
thermistor is enabled, temperature of
the wired remote controller thermistor
is displayed.
00 002
→ired remote controller detected
temp.
01: °F or °C
00 003
→ireless remote controller detected
temp.
01: °F or °C
Temperature detected by wireless
remote controller
00 004 Discharge air temp. 01: °F or °C
00 005 Heat exchanger inlet temp. 01: °F or °C
00 006 Heat exchanger middle temp. 01: °F or °C
00 007 Heat exchanger outlet temp. 01: °F or °C
00 020 Fan rotation number 03: rpm
00 021 Fan 2 rotation number 03: rpm
00 022 Fan 3 rotation number 03: rpm
00 030 Expansion valve 05: pls
00 040 Operating pulse for right filter 05: pls
00 041 Operating pulse for left filter 05: pls
00 042 Operating pulse for filter brush 05: pls
00 050 Power relay for outdoor unit On/Off 08: On/Off 0: Off, 1: On
00 051 Float switch On/Off 08: On/Off
0: Off, 1: On (→hen the water level
rises)
00 052 Drain pump On/Off 08: On/Off 0: Off, 1: On
00 053
Solenoid valve for reheat operation
On/Off
08: On/Off 0: Off (Opened), 1: On (Closed)
00 054 Air cleaner status On/Off 08: On/Off 0: Off, 1: On
00 055 Limit switch 1 (For grille) On/Off 08: On/Off 0: Off, 1: On
00 056 Limit switch 2 (For right filter) On/Off 08: On/Off 0: Off, 1: On
7-13. Peak cut operation - (04-27) - 7. Various control
CONTROL AND
FUNCTIONS
CONTROL AND
FUNCTIONS