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Troubleshooting and maintenance
Error display and remedying errors
Errors which cannot be recovered manually
Display
Error
CPF
Program problem
EPR
EEPROM problem Faulty EEPROM
-OV-
Voltage too high
*
during stop
-LV-
Voltage too low
*
during stop
The VSD is over-
-OH-
*
heated during
stop
CTER
Current Sensor
detecting error
* The failure contact does not function
Emotron AB 01-3990-11r3
Cause
External noise inter-
ference
Detection circuit mal-
function
1. Power voltage too
low
2. Restraining resis-
tor or fuse burnt out
3. Detection circuit
malfunction
1. Detection circuit
malfunctions
2. Ambient tempera-
ture too high or bad
ventilation
Current sensor error
or circuit malfunction
Troubleshooting and maintenance
Remedy
Connect a parallel RC burst absorber
across the magnetizing coil of the mag-
netic contactor that causes interference
Replace EEPROM
Send the VSD back to be repaired
1. Check if the power voltage was correct
or not
2. Replace the restraining resistor or the
fuse
3. Send the VSD back to be repaired
1. Send the VSD back to be repaired
2. Improve ventilation conditions
Send the VSD back to be repaired
77
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