Troubleshooting by Error Codes SiUS281811EA
232 Part 6 Service Diagnosis
4.14 Power Supply Voltage Abnormality
Error Code A8
Applicable
Models
FBQ-P
Method of Error
Detection
Error is detected by checking the input voltage of the fan motor.
Error Decision
Conditions
When the input voltage of fan motor is 150 V or less, or 386 V or more.
Supposed
Causes
Defective power supply voltage
Defective connection on signal line
Defective wiring
Instantaneous power failure, others
Troubleshooting
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
Check and correct each wiring.
It is possible to have external
factor, such as brownout and
instantaneous power failure.
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 side unbalance is within 6 V.
A8
Reoccurrence of
error.
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