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How to troubleshoot an Over Heating Fault (OHF) on an Altivar Process Drive.
Issue:
OHF fault on an Altivar Process Drive.
Product Line:
Altivar Process Drive (ATV630, ATV930, ATV650, ATV950, ATV660, ATV960, ATV680, ATV980)
Environment:
All serial numbers for Altivar Process Drive
Cause:
The OHF fault trip when drive thermal state " THD” reaches 118%, and it can be reset when the drive thermal state is less than 90%.
Read THD to know the drive state. [Display] [Drive parameters] [Drive Therm State]
Resolution:
OHF - Over Heating Fault
IP21/IP55 (ATVx30 and ATVx50)
Drive Systems (ATVx60 and ATVx80)
OHF fault on an Altivar Process Drive.
Product Line:
Altivar Process Drive (ATV630, ATV930, ATV650, ATV950, ATV660, ATV960, ATV680, ATV980)
Environment:
All serial numbers for Altivar Process Drive
Cause:
The OHF fault trip when drive thermal state " THD” reaches 118%, and it can be reset when the drive thermal state is less than 90%.
Read THD to know the drive state. [Display] [Drive parameters] [Drive Therm State]
Resolution:
OHF - Over Heating Fault
IP21/IP55 (ATVx30 and ATVx50)
- Check to make sure heatsink fans are running.
- If fans are not running check following:
- Check Fan Management [Complete settings] [Maintenance] [Fan management]
- Standard - Fan runs when drive is running (Default Setting)
- Always - Fan runs when drive is powered on
- Economy - Fan runs when necessary (According to drive thermal state)
- When the drive thermal state (THD) or DC choke thermal state reach 70% the fan will start. The fan stops when THD is below 60% and DC choke thermal state is below 40%.
- To test fan set to Always and see if it runs
- Check fan ventilation for blockage
- Remove fan carefully and make sure nothing obstructing the fan blades from rotating. (Document attached)
- Apply necessary fan voltage to test fan and see if works.
- Use external power supply to test fan if possible. Should use 24 vdc power supply.
- If fan runs, fan is good and possible bad power board or other internal component in the drive. May need to further troubleshoot drive or replace it.
- If fan does not run the fan is bad and would need to be replaced. List of fan part number below.
- Check Fan Management [Complete settings] [Maintenance] [Fan management]
- If fans are not running check following:
Drive Systems (ATVx60 and ATVx80)
- Check to make sure heatsink fans are running.
- Check 48 V Supply Board
- Fan is power from Supply Board with 48 vdc coming in
- Supply Board is powered with 460 Vac input power
- VX5VPM001 - Fan Kit, Connection Cables
- VX5XPM002 - DC-Supply for Fan
- VX5VPM003 - Enclosure Door Fan
- VX4XPMC1180N4 - Fan Supply Board
Released for:Schneider Electric UK
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