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
General error
Error message Cause Solution
No connectivity to Wi-Fi or
the cloud. Please check your
network connection.
The smart device has no
internet access.
Connect the mobile device to the internet.
An error occurred while trying
to update your profile. Please
try again later.
Device is offline and cannot
be modified.
The router the air conditioner
is connected to, has no
internet access.
Check if the router connected to the air
conditioner has internet access. (You can
check by connecting the mobile device to
the router, then opening the website.) If
there is no access, connect the router to
the internet.
The air conditioner is not
connected to the router.
Check the W-LAN LED indicators on the
air conditioner. If the W-LAN LED lamp is
flashing or off, refer to "Error code table
(Wireless LAN indicator)" on page 03-2
Sign in error
Error message Cause Solution
Could not reach service. The smart device has no
internet access.
Connect the smart device to the internet.
– For iOS
Registration error
Error message Cause Solution
You need an internet
connection to add new
devices.
The user has disabled Wi-Fi
on their smart device.
Enable Wi-Fi from the iOS setting.
Could not register same LAN
device. Make sure both
devices are in the same LAN
and try again to register.
The smart device and air
conditioner are connected to
different Wi-Fi networks
when attempting to register.
Connect the smart device to the same
network as the air conditioner, then retry
the registration.
No registrable device was
found. Make sure Wi-Fi setup
was successful. This method
only works if the Wi-Fi was
recently performed.
The air conditioner is not
connected to Wi-Fi.
Check if the router connected to the air
conditioner has internet access. (You can
check by connecting the smart device to
the router, then opening the website.) If
there is no access, connect the router to
the internet.
Smart device is not
connected to the same
network as the air
conditioner.
Connect the mobile device to the same
network as the air conditioner, then tap
register button.
Could not register the device.
Make sure the device is
ready for registration.
The air conditioner is not
connected to the router.
Enter the Wi-Fi setting on the smart device,
then check if the SSID of the air
conditioner (AP-WF-
) is connected. If
the air conditioner is connected, retry the
registration.
1-4. Error message for wireless LAN control (Mobile app)
- (03-7) - 1. Error code
TROUBLESHOOTING
TROUBLESHOOTING