Daikin VRV RXYMQ-A Series Service Manual page 179

SiME332106E
5.8.2 Power Supply Voltage Abnormality (FXFSQ-AR)
Applicable FXFSQ-AR
Models
A8-01
Error Code
Method of Error This error is detected by checking the voltage status with the microcomputer.
Detection
Error Decision
Overvoltage or voltage drop is detected on the fan driver.
Conditions
Supposed
 Defective connection of power supply connector
Causes  Defective indoor unit PCB (A1P)
 External factors (e.g. noise)
Part 6 Service Diagnosis
Troubleshooting by Error Code
173