Power Supply Voltage Abnormality - Daikin RXYQ-TA Series Service Manual

SiUS341615E

3.11 Power Supply Voltage Abnormality

A8
Error Code
Applicable
FXMQ-PB
Models
Method of Error
Error is detected by checking the input voltage of fan motor.
Detection
Error Decision When the input voltage of fan motor is 150 V or less, or 386 V or more.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Defective power supply voltage
Defective connection on signal line
Defective wiring
Instantaneous power failure, others
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 condition of
power supply
described
above.
NO
A8
Reoccurrence of
error.
NO
YES
YES
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.
192