Danfoss Vacon NXP Applications Manual page 128

126 · vacon
F12 Brake chopper supervision
Brake chopper supervision generates pulses to the brake resistor for response. If no response
is received within set limits, a fault is generated.
Possible cause:
- No brake resistor is installed.
- The brake resistor is broken.
- Brake chopper failure.
Correcting measures:
- Check the brake resistor and the cabling.
- If these are ok, the chopper is faulty. Contact your local distributor.
F13 Drive undertemperature fault
Possible cause:
- Heatsink temperature is under –10°C
Correcting measures:
-
Add cabinet heater to prevent too cold temperatures and condensation.
F14 Drive overtemperature fault
Possible cause:
- Heatsink temperature is above the acceptable limits. See the user manual for the
temperature limit. Overtemperature warning is issued before the actual trip limit is reached.
Correcting measures
- Check correct amount and flow of cooling air.
- Check the heatsink for dust.
- Check ambient temperature.
- Make sure that switching frequency is not too high in relation to ambient temperature and
motor load.
F22 EEPROM checksum fault
Possible cause:
- Parameter save fault.
- Faulty operation.
- Component failure.
Correcting measures:
- If the fault re-occurs, contact your local distributor.
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Tel. +358 (0)201 2121 • Fax: +358 (0)201 2121 205
Fault codes