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Mitsubishi Electric FR-F700PJ Instruction Manual Page 306

Air-conditioning inverter.
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Operation panel
SA
indication
Name
SA
Description
Appears when the shorting wire across the terminals S1 and SC or the terminals S2 and SC is disconnected.
Check point
Check if the shorting wire across the terminals S1 and SC or the terminals S2 and SC is disconnected.
Corrective action
Short across the terminals S1 and SC and the terminals S2 and SC with shortening wires.
(3) Alarm
When an alarm occurs, the output is not shut off. You can also output an alarm signal by making parameter setting.
(Set "98" in Pr. 190 or Pr. 192 (output terminal function selection). Refer to page 140 )
Operation panel
FN
indication
Name
Fan alarm
For the inverter that contains a cooling fan,
Description
an alarm or different operation from the setting of Pr. 244 Cooling fan operation selection.
Check point
Check the cooling fan for an alarm.
Corrective action
Check for fan alarm. Please contact your sales representative.
(4) Fault
When a fault occurs, the inverter trips and a fault signal is output.
Operation panel
E.OC1
indication
Name
Overcurrent trip during acceleration
When the inverter output current reaches or exceeds approximately 170% of the rated current during acceleration, the
Description
protective circuit is activated and the inverter trips.
 Check for sudden acceleration.
 Check that the downward acceleration time is not long for the lift.
 Check for output short-circuit/ground fault.
 Check that the Pr. 3 Base frequency setting is not 60Hz when the motor rated frequency is 50Hz. (V/F control, General-
purpose magnetic flux vector control)
 Check if the stall prevention operation level is set too high.
Check point
 Check if the fast-response current limit operation is disabled. (V/F control, General-purpose magnetic flux vector
control)
 Check that regeneration is not performed frequently. (Check that the output voltage becomes larger than the V/F
reference value at regeneration and overcurrent occurs due to increase in motor current.) (V/F control, General-
purpose magnetic flux vector control)
 Check that the inverter capacity matches with the motor capacity. (IPM motor control)
 Check if a start command is given to the inverter while the motor is coasting. (IPM motor control)
 Increase the acceleration time. (Shorten the downward acceleration time for the lift.)
 When "E.OC1" is always lit at starting, disconnect the motor once and start the inverter.
If "E.OC1" is still lit, contact your sales representative.
 Check the wiring to make sure that output short circuit/ground fault does not occur.
 Set 50Hz in Pr. 3 Base frequency. (V/F control, General-purpose magnetic flux vector control) (Refer to page 103)
Corrective action
 Lower the setting of stall prevention operation level. (Refer to page 103.)
 Activate the fast-response current limit operation. (V/F control, General-purpose magnetic flux vector control)
 Set base voltage (rated voltage of the motor, etc.) in Pr. 19 Base frequency voltage. (Refer to page 103)
 Choose inverter and motor capacities that match. (IPM motor control)
 Input a start command after the motor stops. Alternatively, set the automatic restart after instantaneous power
failure/flying start function. (IPM motor control)
Causes and corrective actions
FR-PU04
——
FR-PU07
FR-PU04
FN
FR-PU07
appears on the operation panel when the cooling fan stops due to
FR-PU04
OC During Acc
FR-PU07
(Refer to page 161.)
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