Fuji Electric FRENIC-Ace Error OH 4: Motor protection (PTC thermistor)

FRENIC-Ace inverter · taken from the manufacturer’s manual, pages cited

Alarm codeOH 4

Motor protection via PTC thermistor has been activated due to excessive heat. The manual lists no action for this code.

Model
Fuji Electric FRENIC-Ace
Display shows
Motor protection (PTC thermistor) (OH 4)
Type
Alarm code
Source
Manual p. 125

What OH 4 means

Motor protection (PTC thermistor) p. 125

If OH 4 is still not resolved

  • contact service / dealer p. 6
    “Failure to heed the information indicated by this symbol may lead to dangerous conditions”
  • contact service / dealer p. 137
    “To ensure the compliance, it is recommended to mount the inverters in a metal panel.”
Open the manual at page 125 All FRENIC-Ace error codes Manual details & download

This page summarises what the manufacturer’s manual says about OH 4; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Fuji Electric. Found a mistake? Report an error.