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Causes and corrective actions
(3) Alarm
When an alarm occurs, the converter continues its operation. You can also output an alarm signal by making parameter
setting.
(Set "98" in any of Pr. 11 to Pr. 16 (output terminal function selection). Refer to page 78)
(4) Fault
When a fault occurs, the converter trips and a fault signal is output. Output of the connected inverter is also shut off.
Operation Panel
Indication
MT
FR-PU07 MT
Name
Maintenance signal output
Description
Indicates that the cumulative energization time of the converter has reached a given time.
When the setting of Pr. 35 Maintenance timer alarm output set time is the initial setting (Pr. 35 = "9999"), this
warning does not occur.
Checkpoint
Check that the Pr. 34 Maintenance timer setting is larger than Pr. 35 Maintenance timer alarm output set time
setting. (Refer to page 82)
Corrective action
Setting "0" to Pr. 34 Maintenance timer erases the signal.
Operation Panel
Indication
CP FR-PU07 CP
Name
Parameter copy
Description
Appears when parameters are copied between models with capacities of 55K or lower and 75K or higher.
Check point
Resetting of Pr. 50, Pr. 51, Pr. 52, Pr. 53, Pr. 54, Pr. 55, Pr. 56 and Pr. 57 is necessary.
Corrective action
Set the initial value in Pr. 989 Parameter copy alarm release.
Operation Panel
Indication
SL FR-PU07 SL
Name
Power supply not detected
Description
Appears when the power supply detection ends incompletely at a power failure.
Appears at the power ON of the control circuit when using separate power sources for the control circuit
power source and for the main circuit power source. It is not a fault.
Checkpoint
Check the power source and the wiring.
Check the wiring for power source detection.
Corrective action
Perform wiring correctly.
Operation Panel
Indication
FN
FR-PU07 FN
Name
Fan alarm
Description
appears on the operation panel when the cooling fan of the converter trips, when its speed drops, or
when it does not operate as commanded by the Pr. 36 Cooling fan operation selection.
Checkpoint
Check the cooling fan for a failure.
Corrective action
Failure of the cooling fan might be the cause. Please contact your sales representative.
Operation Panel
Indication
E.OC2
FR-PU07 Stedy Spd OC
Name
Overcurrent trip
Description
Stops the converter operation when the input current exceeds the specified level during the converter
operation.
Checkpoint
Check for sudden load change.
Check for output short-circuit.
Check that the wiring is performed correctly.
Check that any power supply failure did not occur.
Corrective action
Keep the load stable.
Check the wiring to make sure that output short circuit does not occur.
Check the wiring.
Check the power supply.
HC2.book 128 ページ ２０１２年１１月１９日 月曜日 午前１０時５２分