Troubleshooting by Error Code SiUS341802E
185 Service Diagnosis
2.11 Power Supply Voltage Abnormality
Error Code A8
Applicable
Models
FXSQ-TA, FXMQ-PB
Method of Error
Detection
Error is detected by checking the input voltage of fan motor.
Error Decision
Conditions
When the input voltage of fan motor is 150 V or less, or 386 V or more.
Supposed
Causes
îš„ Defective power supply voltage
îš„ Defective connection on signal line
îš„ Defective wiring
îš„ Instantaneous power failure, others
Troubleshooting
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.
YES
There are
problems on
the condition of
power supply
described
above.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Correct any fault.
NO
NO
YES
A8
Reoccurrence of
error.
Check and correct each wiring.
It is possible to have external
factor, such as brownout and
instantaneous power failure.
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