154
TROUBLESHOOTING
TROUBLESHOOTING
1. Error Code Description and Possible Cause
Error code
Contents Error detection / Judgment
RC
display
Outdoor control PCB
Code Sub code
AF 30 n (Air net
address)
Indoor drain failure The float switch repeats ON and OFF 5 times or more while the
temperature control is OFF.
AH 31 n (Air net
address)
Indoor dust collector failure Error signal is received or no operation signal is received from
the dust collector (sold separately) when the dust collector is
installed.
AJ 22 n (Air net
address)
Indoor unit capacity setting error 1. The capacity code is not contained in the indoor control
PCB's memory, and the capacity setting adaptor is not
connected.
2. When the non-compliant capacity of the model is set.
A0 63 n (Air net
address)
Indoor external protective
device activation
There is an emergency stop call from the indoor unit.
A1 20 n (Air net
address)
Indoor control PCB setting error Data can not be correctly received from the EEPROM.
A3 95 n (Air net
address)
Indoor unit abnormal drain
water level
1. Drain water is detected in cooling/dehumidifying operation
during compressor operation.
2. Drain water is detected in heating operation.
3. Drain water is detected again 3 minutes after drain water
detection other than 1) and 2) above.
A6 15 n (Air net
address)
Indoor fan motor failure Detection condition varies depending on the indoor unit model.
A7 35 n (Air net
address)
Indoor swing flap motor failure The limit switch does not reverse (ON/OFF) when the swing flap
motor is activated for 30 seconds.
A8 25 n (Air net
address)
Indoor unit power supply
voltage failure
The input voltage for the indoor fan motor is lower than 150 V or
386 V or higher
A9 21 n (Air net
address)
Indoor electronic expansion
valve driving part failure
The signal input to the electronic expansion valve is not normal
during the initialization of the microcomputer.
CA 98 n (Air net
address)
Indoor discharge air tempera-
ture sensor failure
Indoor discharge air temperature sensor disconnection or short
circuit during operation.
CE 99 n (Air net
address)
Indoor human detection · floor
temperature sensor failure
Human detection · floor temperature sensor disconnection or
short circuit during operation.
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