Common errors of FUJI Inverter and How to fix them – Part II

27/06/2017

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1 Common errors of FUJI Inverter

1.1 OH1 – Cooling fan overheat

1.2 OH2 – External alarm

1.3 OH3 – Inverter inside overheat

1.4 OH4 – Motor protection

Common errors of FUJI Inverter

Following part 1, in this part, Hao Phuong would like to send to customers how to fix the error of overheating protection error, internal overheating fault, external fault on Fuji Electric inverter.

OH1 – Cooling fan overheat

	Possible causes	Checking and Fixing
1	The temperature of the inverter exceeds the allowed temperature	Check the temperature around the inverter
2	Ventilation door is blocked	Clean the inverter Check if the cooler is blocked
3	The working time of the cooling fan exceeds the normal level, or the cooling fan fails	Check the fan working time. Replace fan. Visual inspection whether the rotary fan is abnormal or not
4	Load too heavy	Check the output line.

OH2 – External alarm

	Possible causes	Checking and Fixing
1	Error function of external device	Check if the external device is working. Removing any device causes an error
2	Connection errors	Check if the fault line is correctly connected to the terminal (External failure) (E01-08, E98, E99 set to 9)
3	Wrong settings	Resetting.

OH3 – Inverter inside overheat

	Possible causes	Checking and Fixing
1	The ambient temperature exceeds the allowable limit of the inverter	Check the ambient temperature Improve the ambient temperature by improving the inverter cooling system

OH4 – Motor protection

	Possible causes	Checking and Fixing
1	The temperature around the motor exceeds the allowed temperature of the engine	Check the temperature around the engine
2	Cooling fan system failed	Check cooling and repair system if damaged.

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