Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 156

Troubleshooting by Error Code
4.5.2 Indoor Fan Motor Abnormality (FXMQ15-54PB)
A6
Error Code
Applicable
FXMQ15-54PB
Models
Method of Error Error from the current flow on the fan PCB
Detection Error from the RPM 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
143
An overcurrent flows.
The RPM is less than a certain level for 6 seconds.
A position error in the fan rotor continues for 5 seconds or more.
Clogging of a foreign matter
Disconnection of the fan motor connectors (X1A and X2A)
Disconnection of the connectors between the indoor unit main PCB (A1P) and fan PCB (A2P)
Defective fan PCB (A2P)
Defective fan motor
SiUS331604E
Service Diagnosis