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Mitsubishi Electric FR-F700PJ Instruction Manual Page 310

Air-conditioning inverter.
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Operation panel
E.BE
indication
Name
Brake transistor alarm detection
When a brake transistor alarm has occurred due to the large regenerative energy from the motor etc., the brake
transistor alarm is detected and the inverter trips.
Description
In this case, the inverter must be powered OFF immediately.
 Reduce the load inertia.
Check point
 Check that the frequency of using the brake is appropriate.
 Check that the brake resistor selected is correct.
Corrective action
Replace the inverter.
Operation panel
E.GF
indication
Name
Output side earth (ground) fault overcurrent at start
The inverter trips if an earth (ground) fault overcurrent flows at start due to an earth (ground) fault that occurred on
the inverter's output side (load side). Whether this protective function is used or not is set with Pr. 249 Earth (ground)
Description
fault detection at start. When the setting of Pr. 249 Earth (ground) fault detection at start is the initial value (Pr. 249 ="0"),
this warning does not occur.
Check point
Check for a ground fault in the motor and connection cable.
Corrective action
Remedy the ground fault portion.
Operation panel
E.LF
indication
Name
Output phase loss
If one of the three phases (U, V, W) on the inverter's output side (load side) is lost during inverter operation (except
Description
during DC injection brake operation and when output frequency is under 1Hz), inverter stops the output. Whether the
protective function is used or not is set with Pr.251 Output phase loss protection selection.
 Check the wiring. (Check that the motor is normal.)
Check point
 Check that the capacity of the motor used is not smaller than that of the inverter.
 Check if a start command is given to the inverter while the motor is coasting. (IPM motor control)
 Wire the cables properly.
 Choose inverter and motor capacities that match.
Corrective action
Input a start command after the motor stops. Alternatively, use automatic restart after instantaneous power
failure/flying start function.
Operation panel
E.OHT
indication
Name
External thermal relay operation
If the external thermal relay provided for motor overheat protection or the internally mounted temperature relay in the
motor, etc. switches ON (contacts open), the inverter output is stopped.
Description
This function is available when "7" (OH signal) is set in any of Pr. 178 to Pr. 182 (input terminal function selection).
This protective function is not available in the initial status (OH signal is not assigned).
 Check for motor overheating.
Check point
 Check that the value of 7 (OH signal) is set correctly in any of Pr. 178 to Pr. 182 (input terminal function selection).
 Reduce the load and frequency of operation.
Corrective action
 Even if the relay contacts are reset automatically, the inverter will not restart unless it is reset.
Operation panel
E.PTC
indication
Name
PTC thermistor operation
Inverter trips when resistance of PTC thermistor connected between terminal 2 and terminal 10 is more than the
Description
value set in Pr. 561 PTC thermistor protection level. This protective function is not available when Pr. 561 setting is initial
value (Pr. 561 = "9999").
 Check the connection of the PTC thermistor.
Check point
 Check the Pr. 561 PTC thermistor protection level setting.
 Check the motor for operation under overload.
Corrective action
Reduce the load weight.
Causes and corrective actions
FR-PU04
Br. Cct. Fault
FR-PU07
FR-PU04
Ground Fault
FR-PU07
FR-PU04
E.LF
FR-PU07
(IPM motor control)
(Refer to page 161
FR-PU04
OH Fault
FR-PU07
FR-PU04
Fault 14
FR-PU07
PTC activated
,
166)
5
305

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