Daikin VRV RXYQ72-384XAYCA Service Manual page 246

Troubleshooting by Error Code
3.7.3 Indoor Fan Motor Abnormality (FXSQ54TA, FXSQ54TB, FXMQ15-54PB,
FXMQ30-54TB, FXMQ-TA Models)
Applicable
FXSQ54TA, FXSQ54TB, FXMQ15-54PB, FXMQ30-54TB, FXMQ-TA
Models
A6
Error Code
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
 An overcurrent flows.
Conditions  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.
Supposed
 Clogging of a foreign matter
Causes  Disconnection of the fan motor connectors (X1A and X2A)
 Disconnection of the connectors between the indoor unit control PCB (A1P) and fan PCB (A2P)
 Defective fan PCB (A2P)
 Defective fan motor
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SiUS342004EB
Part 6 Service Diagnosis