Digital Operator Display
Fault Name
Three PG option boards are installed.
A maximum of two PG option boards can be used simultaneously. Remove the PG option board installed
into option port CN5-A.
Digital Operator Display
Fault Name
to
oFC03 to oFC11
Option Card Error Occurred at Option Port CN5-C
to
oFC12 to oFC17
Cause
Possible Solution
Option card or hardware is damaged
• Cycle power to the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
Digital Operator Display
Fault Name
to
oFC50 to oFC55
Option Card Error Occurred at Option Port CN5-C
Cause
Possible Solution
Option card or hardware is damaged
Refer to the option manual for details.
Digital Operator Display
Fault Name
oH
Heatsink Overheat
The heatsink temperature exceeded the overheat pre-alarm level set to L8-02. The default value for L8-02
is determined by drive model selection (o2-04).
Cause
Possible Solution
Surrounding temperature is too high
• Check the temperature surrounding the drive. Verify temperature is within drive specifications.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
Load is too heavy
• Measure the output current.
• Decrease the load.
• Lower the carrier frequency selection (C6-02).
Internal cooling fan is stopped
• Replace the cooling fan.
• After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.
Digital Operator Display
Fault Name
oH1
Overheat 1 (Heatsink Overheat)
The heatsink temperature exceeded the drive overheat level. Overheat level is determined by drive
capacity (o2-04).
Cause
Possible Solution
Surrounding temperature is too high
• Check the temperature surrounding the drive.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
Load is too heavy
• Measure the output current.
• Lower the carrier frequency selection (C6-02).
• Reduce the load.
Digital Operator Display
Fault Name
oH3
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the alarm detection level.
• Detection requires setting multi-function analog inputs H3-02, H3-10, or H3-06 to E.
Cause
Possible Solution
6.4 Fault Detection
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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6
Troubleshooting
Summary of Contents for U1000 iQpump Drive
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