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7-7
7 Troubleshooting
FVR-C11S-EN
7
7-2 Other trouble
1) When motor does not rotate.
Note:
Verify the function settings for the operation commands and
frequency setting values on the keypad panel.
Motor does not start.
Does charge lamp light?
No
Are circuit breaker and
magnetic contactor on
power supply side
switched ON?
No
Investigate cause of
failed switching, and
turn them ON if there is
no problem.
Yes
Yes
Remedy failed function
and start after resetting
alarm.
Yes
Alarm displayed on
keypad panel?
Voltage of main power
supply input terminals
normal?
No
Check for failures such
as low voltage,
phase failure, loose
connection, and poor
contact, and remedy
accordingly.
No
If no error is detected,
continue operation.
Is the operation method
the keypad panel or
input signal?
Possibly of faulty
inverter.
Contact Fuji Electric.
Yes
Does motor run if RUN
key is pressed?
No
Forward or reverse
operation command
given?
No
External wiring between
control circuit terminals
FWD, REV - P24/CM
connected correctly?
Yes
Replace faulty switch or
relay.
No
Press UP key and set
frequency.
Remedy wiring error.
Yes
Does inverter start when
UP key pressed?
No
Does frequency setting
exceed starting and
stop frequency.
No
Setting of built-in
POT (VR) and
connections of external
circuit wiring between
control circuit terminals
13,12,11,C1 or X1, X2,
X2 - P24/CM correct?
Yes
Replace faulty
frequency setting
POT (VR), signal
converter, switch,
or relay contacts as
appropriate.
No
Yes
Keypad
panel
Input
signal
Yes
Yes
No
No
Yes
Yes
(Continued)