Power Supply Voltage Abnormality - Daikin VRV RXYMQ-A Series Service Manual

Troubleshooting by Error Code
5.8

Power Supply Voltage Abnormality

5.8.1 Power Supply Voltage Abnormality (FXMQ-PB)
Applicable
FXMQ-PB
Models
A8
Error Code
Method of Error Error is detected by checking the input voltage of the fan motor.
Detection
Error Decision
When the input voltage of fan motor is 150 V or less, or 386 V or more.
Conditions
Supposed  Defective power supply voltage.
 Defective connection on signal line.
Causes
 Defective wiring.
 Instantaneous power failure, others.
Troubleshooting
172
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the condition of the power
supply.
(1) Check if power supply voltage is
220-240 V ± 10%.
(2) Check if there is power open
phase or defective wiring.
(3) Check if power supply voltage
unbalance is within 6 V.
There are
problems on the
condition of power supply
described above.
NO
A8
Reoccurrence of
error.
NO
YES
YES
SiME332106E
Correct any fault.
Check and correct each wiring.
It is possible there was an
external cause, such as
brownout or instantaneous
power failure.
Part 6 Service Diagnosis