Mitsubishi Electric FR-F740 EC Instruction Manual page 581

Troubleshooting
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
FR-F700 EC
E.FIN
Fin overheat
If the heatsink overheats, the temperature sensor is actuated to stop the inverter output.
The FIN signal can be output when the temperature becomes approximately 85% of the
heatsink overheat protection operation temperature. For the terminal used for the FIN sig-
nal output, assign the function by setting "26" (source logic) or "126" (sink logic) in any of
Pr. 190 to Pr. 196 "Output terminal function selection". (Refer to section 6.9.5.)
Check for too high ambient temperature.
Check for heatsink clogging.
Check that the cooling fan is stopped. (Check that FN is displayed on the operation
panel.)
Set the ambient temperature to within the specifications.
Clean the heatsink.
Replace the cooling fan.
E.IPF
Instantaneous power failure protection
If a power failure occurs for longer than 15ms (this also applies to inverter input shut-off),
the instantaneous power failure protective function is activated to stop the inverter output in
order to prevent the control circuit from malfunctioning. If a power failure persists for longer
than 100ms, the alarm warning output is not provided, and the inverter restarts if the start
signal is on upon power restoration. (The inverter continues operating if an instantaneous
power failure is within 15ms.) In some operating status (load magnitude, acceleration/
deceleration time setting, etc.), overcurrent or other protection may be activated upon
power restoration.
When instantaneous power failure protection is activated, the IPF signal is output. (Refer to
section 6.11.)
Find the cause of instantaneous power failure occurrence.
Remedy the instantaneous power failure.
Prepare a backup power supply for instantaneous power failure.
Set the function of automatic restart after instantaneous power failure (Pr. 57).
(Refer to section 6.11.1.)
E.BE
Brake transistor alarm detection/internal circuit error
This function stops the inverter output if an alarm occurs in the brake circuit, e.g. damaged
brake transistors when using functions of the 01800 or more.
In this case, the inverter must be powered off immediately.
For the 01160 or less, it appears when an internal circuit error occurred.
Reduce the load inertia.
Check that the frequency of using the brake is proper.
Check that the brake resistor selected is correct.
For the 01800 or more, when the protective function is activated even if the above meas-
ures are taken, replace the brake unit with a new one.
For the 01160 or less, replace the inverter.
Causes and corrective actions
FR-PU04
H/Sink O/Temp
FR-PU07(-01)
FR-PU04
Inst. Pwr. Loss
FR-PU07(-01)
FR-PU04
Br. Cct. Fault
FR-PU07(-01)
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