Chapter 5 Troubleshooting; Alarm Codes - Fuji Electric FRENIC-HVAC Manual

Chapter 5 TROUBLESHOOTING

5.1 Alarm Codes

Code
OC1
OC2 Instantaneous overcurrent
OC3
EF Ground fault
OV1
OV2 Overvoltage
OV3
LV Undervoltage
Lin Input phase loss
OPL Output phase loss
OH1 Heat sink overheat
OH2 External alarm
OH3 Inverter internal overheat
OH4 Motor protection (PTC thermistor)
FUS Fuse trip
PbF Charging circuit malfunction
OL1 Overload of motor 1
OLU Inverter overload
Er1 Memory error
Er2 Keypad communications error
Er3 CPU error
Er4 Option communications error
Er5 Option error
Er6 Operation protection
Er7 Tuning error
Er8 RS-485 communications error (COM port 1)
ErP RS-485 communications error (COM port 2)
ErF Data saving error during undervoltage
ErH Hardware error
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Table 5.1 Quick List of Alarm Codes
Name
5-1
Description
The inverter momentary output current exceeded the
overcurrent level.
OC1: Overcurrent during acceleration
OC2: Overcurrent during deceleration
OC3: Overcurrent during running at a constant speed
A ground-fault current flowed from the inverter's output
terminals. (on 200V class series inverter of 22kW (30HP)
or above and 400V ones of 45kW (60HP) or above)
The DC link bus voltage exceeded the overvoltage
detection level.
OV1: Overvoltage during acceleration
OV2: Overvoltage during deceleration
OV3: Overvoltage during running at a constant speed
The DC link bus voltage dropped below the undervoltage
detection level.
An input phase loss occurred or the Interphase voltage
unbalance rate was large.
An output phase loss occurred.
The temperature around the heat sink has risen
abnormally.
The external alarm THR was entered.
(when the THR "Enable external alarm trip" has been
assigned to any digital input terminal)
The temperature inside the inverter has exceeded the
allowable limit.
The temperature of the motor has risen abnormally.
An internal short-circuit tripped a fuse (on 200V class
series inverter of 90kW (125HP) or above and 400V ones
of 110kW (150HP) or above)
No power was supplied to the charging resistance
short-circuit electromagnetic contactor (on 200V class
series inverter of 22kW (30HP) or above and 400V ones
of 45kW (60HP) or above).
The electronic thermal protection for motor overload
detection was activated.
The temperature inside the inverter has risen abnormally.
An error has occurred in writing data to the memory in the
inverter.
A communications error has occurred between the
keypad and the inverter.
A CPU error or LSI error has occurred.
A communications error has occurred between the
connected option card and the inverter.
An error was detected by the connected option card (not
by the inverter).
An incorrect operation was attempted.
Auto-tuning has failed, resulting in abnormal tuning
results.
A communications error has occurred during RS-485
communication.
When the undervoltage protection was activated, the
inverter failed to save data, showing this error.
The LSI on the power printed circuit board has
malfunctioned due to noise, etc.