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  1. Home
  2. Fault Codes
  3. PowerFlex 525
  4. F008
F008Type 1 fault (auto-reset) · ThermalUsually repairable

PowerFlex 525 F008: Heatsink OvrTmp

What F008 means

The heatsink or power module inside the drive is too hot.

Symptoms

Trips after running a while, worse in summer or in a closed cabinet.

Is it repairable?

Yes: fan replacement and power-section repair are routine.

Common causes

  • Blocked or dusty heatsink fins
  • Failed cooling fan
  • High cabinet temperature
  • Drive overloaded for its size

Safe checks

  1. 1Check that the drive fan spins
  2. 2Clean the heatsink fins
  3. 3Measure the cabinet temperature

Drives hold dangerous voltage after power-off. Checks should only be done by qualified personnel, with power isolated and the DC link discharged.

Reviewed by AutomIQ repair technicians. Code and name from the PowerFlex 520-Series Adjustable Frequency AC Drive User Manual.

Related PowerFlex 525 faults

  • F004UnderVoltage
  • F005OverVoltage
  • F007Motor Overload
  • F012HW OverCurrent
  • F013Ground Fault
  • F021Output Ph Loss
All 47 PowerFlex 525 codes

Still showing F008?

PowerFlex drive faulted?

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Related services: VFD repair · Cooling fan replacement

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Fault codes
2,364 explained
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