Daikin REYQ-TA Series Service Manual page 192

Troubleshooting by Error Code
3.5.2 Indoor Fan Motor Abnormality (FXMQ15-54PB Models)
A6
Error Code
Applicable
FXMQ15-54PB
Models
Method of Error Error from the current flow on the fan PCB
Detection Error from the rotation speed of the fan motor in operation
Error from the position signal of the fan motor
Error from the current flow on the fan PCB when the fan motor starting operation
Error Decision
Conditions
Supposed
Causes
179
An overcurrent flows.
The rotation speed is less than a certain level for 6 seconds.
A position error in the fan rotor continues for 5 seconds or more.
The clogging of a foreign matter
The disconnection of the fan motor connectors (X1A and X2A)
The disconnection of the connectors between the indoor unit PCB (A1P) and fan PCB (A2P)
Defective fan PCB (A2P)
Defective fan motor
SiUS371614E
Service Diagnosis