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Appendix 2 Alarm Code List
Alarm Code
Code
Screen Display
Cause
Troubleshooting
OV3
Over-voltage
during
deceleration
Over-voltage
between
Terminal P and Terminal N
Please refer to OV1, OV2.
THT
The IGBT
module is
overheating
The IGBT module thermal
accumulating relay acts
Avoid the inverter long timely
operating
under
overload
condition
THN
Motor
overheating
The electronic thermal relay
operates
1.
Check whether the set value
of the P.9 is correct or not
(the set value should comply
the actual motor)
2.
Reduce load
FAN
Cooling Fan
Alarm
Cooling Fan Failure
1. Cooling fan damaged, please
replace a new fan.
2. If fan is blocked by any
objects, please clean it.
3. Check if Fan wiring is
broken/loose,
or
need
to
replace new fan.
OHT
The external
thermal relay
operates.
The external thermal relay
operates
1. Check the capacity of the
external thermal relay and the
motor for matching.
2. Reduce the load
OPT
Peripheral
devices are
abnormal
1.Abnormal communication.
The
maximum
communication retry number
is violated.
2.Interrupted communication.
The
maximum
communication check time
interval is violated.
Correctly set the communication
parameters
EEP
Memory is
abnormal
The memory ROM fails
Send it back to the factory.
IPF
Abnormal power
supply
Abnormal power supply
Please
check
power
supply
system
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