Troubleshooting - Mitsubishi Electric FR-A700 Installation Manualline

7 TROUBLESHOOTING

When a fault occurs in the inverter, the inverter trips stop and the PU display automatically changes to any of the
following fault or alarm indications.
If the fault does not correspond to any of the following faults or if you have any other problem, please contact your sales
representative.
• Retention of alarm output signal ......... When the magnetic contactor (MC) provided on the input side of the inverter is
• Alarm display ...................................... When the protective function is activated, the operation panel display
• Resetting method................................ When the protective function is activated, the inverter output is kept stopped.
• When the protective function is activated, take the corresponding corrective action, then reset the inverter, and
resume operation.
Not doing so may lead to the inverter fault and damage.
Inverter alarm displays are roughly divided as below.
(1) Error Message
A message regarding operational fault and setting fault by the operation panel (FR-DU07) and parameter unit (FR-
PU04 /FR-PU07) is displayed.
The inverter does not trip.
(2) Warnings
The inverter does not trip even when a warning is displayed. However, failure to take appropriate measures will
lead to a major fault.
(3) Alarm
The inverter does not trip. You can also output a minor fault signal by making parameter setting.
(4) Fault
When a fault occurs, the inverter trips and a fault signal is output.
7.1 Reset method of protective function
(1) Resetting the inverter
The inverter can be reset by performing any of the following operations. Note that the internal thermal integrated value
of the electronic thermal relay function and the number of retries are cleared (erased) by resetting the inverter.
Inverter recovers about 1s after the reset is released.
Operation 1: ..... Using the operation panel, press
(This may only be performed when a fault occurs. ((Refer to the
Instruction Manual) for major fault.)
Operation 2: ...... Switch power off once, then switch it on again.
Operation 3: . .... Turn on the reset signal (RES) for more than 0.1s. (If the RES signal is
kept on, "Err." appears (flickers) to indicate that the inverter is in a reset
status.)
opened at the activation of the protective function, the inverter's control power
will be lost and the alarm output will not be held.
automatically switches to the above indication.
Unless reset, therefore, the inverter cannot restart. (Refer to page 33.)
to reset the inverter.
TROUBLESHOOTING
ON
OFF
Inverter
RES
SD
33