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Honeywell HVAC232 Series Applications Manual page 36


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Fault code
Fault name
Under voltage
Input phase fault
Output phase fault
Frequency converter
under temperature
Frequency converter over
Motor stalled
Motor over temperature
Motor underload
EEPROM checksum fault
Application manual HVAC232/402 | Document 27-652 | Issue ENG06 | 2019-08-07
Possible cause
The DC-link voltage has gone below the internal
safety limit:
• most probable cause: supply voltage is too low
• frequency converter internal fault
• power outages
Input phase is missing
Current measurement has detected that there is no
current in one motor phase.
Heat sink temperature is under 14 °F (–10 °C)
Heat sink is overheated.
Motor stall protection has tripped.
Motor overheating has been detected by frequency
converter motor temperature model.
Motor is overloaded.
Motor underload protection has tripped.
Parameter save fault
• faulty operation
• component failure
Correcting actions
In case of temporary supply voltage break reset the
fault and restart the frequency converter.
Check the supply voltage. If it is adequate, an internal
failure has occurred.
Contact the distributor near to you.
Check supply voltage, fuses and cable.
Check motor cable and motor.
Check the ambient temperature.
Check that the cooling air flow is not blocked.
Check the ambient temperature.
Clean the heatsink dust.
Make sure that the switching frequency is not too high
in relation to ambient temperature and motor load.
Check that the motor is able to rotate freely.
Decrease the motor load.
If no motor overload exists, check the temperature
model parameters.
Check motor and load, , as well as the low load
detection parameters (P11.14 - P11.16).
E.g. for broken belts or dry pumps.
Contact the distributor near to you.

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