Power Supply Voltage Abnormality - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB

3.13 Power Supply Voltage Abnormality

Applicable
FXSQ-TA, FXSQ-TB, FXMQ-PB, FXMQ-TB
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
Causes  Defective connection on signal line
 Defective wiring
 Instantaneous power failure, others
Troubleshooting
Part 6 Service Diagnosis
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
208-230 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
YES
condition of power
supply described
above.
NO
A8
YES
Reoccurrence
of error.
NO
Troubleshooting by Error Code
Correct any fault.
Check and correct each wiring.
It is possible to have external
factor, such as brownout and
instantaneous power failure.
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