Troubleshooting by Remote Controller
SiUS281117
Service Diagnosis
117
2.11 Abnormal Power Supply Voltage
Remote
Controller
Display
A8
Applicable
Models
FBQ
Method of Error
Detection
Detect error checking the input voltage of fan motor
Error Decision
Conditions
When the input voltage of fan motor is 150V and less, or 420V and more
Supposed
Causes
Power supply voltage error
Defective connection on signal line
Defective wiring
Instantaneous blackout, others
Troubleshooting
Check the condition of the
power supply.
Check if power supply voltage
is 208V - 230V ± 10%.
Check if there is power open
phase or defective wiring.
Check if power supply voltage
side unbalance is within 6V.
Correct any fault.
There are
problems on the
condition of power supply
described above.
Check and correct each
wiring.
Error is
displayed again.
It is possible to have external
factor, such as brownout and
instantaneous blackout.
YES
YES
NO
NO
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
