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Protective functions
When a fault occurs in the converter, the protective function activates to trip the converter, and the PU display automatically
changes to one of the following fault or alarm indications.
Operation Panel Indication
Error
message
Warning
Alarm
Fault
Resetting the converter initializes the cumulative value of the internal thermal relay.
The error message shows an operational error. The converter does not trip.
Warnings are messages given before faults occur. The converter does not trip.
Alarms warn the operator of failures with output signals. The converter does not trip.
When faults occur, the protective functions are activated to trip the converter and output the fault signals.
Assign the OH signal to one of Pr.3 to Pr.7 (Input terminal function selection) to enable the external thermal relay operation.
This protective function is not available in the initial status.
E — — —
Faults history
HOLD
Operation panel lock
Er1
Parameter write error
rE1 to 4
Copy operation fault
Err.
Error
OL
Overload signal detection
PS
PU stop
TH
Electronic thermal relay pre-alarm
Maintenance signal output
MT
CP
Parameter copy
SL
Power supply not detected
FN
Fan fault
E.OC2
Overcurrent trip
E.OV2
Overvoltage trip
Converter overload trip (electronic thermal relay function)
E.THT
E.FIN
Fin overheat
E.IPF
Instantaneous power failure
E.UVT
Undervoltage
E.ILF
Input phase loss
External thermal relay operation
E.OHT
E. 2
HC2 dedicated board disconnection
E. 3
Option fault
E.OP3
Communication option fault
E.PE
Parameter storage device fault (control circuit board)
E.PE2
Parameter storage device fault (main circuit board)
PU disconnection
E.PUE
E.RET
Retry count excess
E. 6
E. 7
CPU fault
CPU
E. 8
Input power supply fault 1
E. 9
Input power supply fault 2
E.CTE
Operation panel power supply short circuit, RS-485 terminal power supply short circuit
E.P24
24VDC power output short circuit
Input current detection value exceeded
E.CDO
E.IOH
Inrush current limit circuit fault
E. 13
Internal circuit fault
Name
25
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