10. Diagnostic information and troubleshooting
Indoor failure code
Note:
1. Please contact the installers or distributors when trouble happens.
2. Turn the power off and power on again, if the failure code recurs, please change the indoor unit
PCB.
3. Failrue codes maked with* are resumable.
TROUBLE SHOOTING
FAILURE CODE
POSSIBLE REASONS
Faulty temperature sensor Tai 1
Sensor disconnected, or broken, or at wrong
Faulty temperature sensor Tc1 2
Sensor disconnected, or broken, or at wrong
position, or short circuit
Faulty temperature sensor Tc2 3
Sensor disconnected, or broken, or at wrong
Faulty temperature sensor Tm 4
Sensor disconnected, or broken, or at wrong
position, or short circuit
Faulty EEPROM on indoor
5
Faulty indoor unit PCB
Abnormal communication
between indoor and outdoor unit
6
Wrong connection, or the wires be disconnected,
or wrong address setting of indoor units, or faulty
PCB, or faulty power supply
Indoor unit address repeated 9 Wrong setting of indoor unit address
Central control address repeated 10
Wrong setting of centralized control indoor unit
Faulty indoor unit fan motor 11
Fan is blocked, or the terminal is disconnected
from the PCB, or faulty indoor unit PCB
Faulty driver of indoor unit
12 Faulty indoor unit PCB
Malfunction on outdoor unit 20
Check the outdoor unit
-59-
Commercial Air Conditioner Model: AU18/222XFERA
AS072/092/122XVERA
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