53
Failure Indication:
Faults which cannot be reset by Manual Operation
:
Fault Code
Content
Probable Cause
Action Item
CPF
CPU Software
Error
1. Excessive electrical
noise
1. Install RC type suppresser on all
contactor / brake coils
EPR
EEPROM Error
1. EEPROM is damaged
1. Change EEPROM
- OV -
Overvoltage in
Stop Mode
1. Detection circuit is
damaged
1. Contact factory
- LV -
Low Voltage in
Stop Mode
1. Input voltage is too low
2. Current limit resistor
(R1) or fuse burned out
- 460V Series
3. Detection circuit is
damaged
1. Correct input voltage
2. Change current limit resistor or
fuse
3. Contact factory
- OH -
Heatsink Over-
Heat in Stop
Mode
1. Detection circuit is
damaged
2. Ambient temperature is
too high or ventilation
is poor
1. Contact factory
2. Lower ambient temperature or
improve ventilation
OH1*
Braking Resistor
Overload
1. Decel Time is too short
2. Frequent RUN / STOP
operation
3. Excessive load
1. Increase Decel Time
2. Increase RUN / STOP cycle
3. Set
Fn_44
to xx0x and increase
resistance of braking resistor
When the braking resistor is overloaded during deceleration, the Inverter will stop braking and
display “OH1”. When the heat is dissipated, the “OH1” will disappear and the Inverter will start
braking again.