Mitsubishi Electric FR-CC2-P Instruction Manual page 146

Alarm
The inverter output is not shut off when a protective function is activated. An alarm can also be output with a parameter
setting.
(Set "98" in Pr.190 to Pr.195 (Output terminal function selection). (Refer to
Operation panel
indication
Name
Fan alarm
FN appears on the operation panel when the cooling fan of the converter unit stops due to a fault or when the
Description
speed decreases.
Check point
Check the cooling fan for a failure.
Corrective action
Check for fan failure. Contact your sales representative.
Fault
When a protective function activates, the inverter output is not shut off and a fault signal is output.
Operation panel
indication
Name
Overvoltage trip
If the converter unit's internal main circuit DC voltage reaches or exceeds the specified value, the protective
Description
circuit is activated to stop the inverter output. The circuit may also be activated by a surge voltage produced
in the power supply system.
• Check for sudden load change or excessive regeneration.
Check point
• Check for power fault.
• Keep the load stable.
Corrective action
• Check the power supply.
Operation panel
indication
Name
Converter overload trip (electronic thermal relay function)
For the protection of converter unit diode, the electronic thermal O/L relay is activated in inverse-time
Description
characteristics against the converter unit input current to shut off the inverter output.
• Check the motor for the use under overload.
Check point
• Check that the capacity of the inverter used is not larger than that of the converter unit.
• Reduce the load.
Corrective action
• Check the configuration of the inverter and the converter unit again.

Resetting the converter unit initializes the internal cumulative heat value of the electronic thermal O/L relay function.
Operation panel
indication
Name
Heat sink overheat
When the heat sink overheats, the temperature sensor activates, and the inverter output is stopped.
The FIN signal can be output when the temperature reaches approximately 85% of the heat sink overheat
Description
protection operation temperature.
For the terminal used for the FIN signal output, assign the function by setting "26 (positive logic) or 126
(negative logic)" in any of Pr.190 to Pr.195 (Output terminal function selection). (Refer to
• Check for too high surrounding air temperature.
Check point
• Check for heat sink clogging.
• Check that the cooling fan is not stopped. (Check that FN is not displayed on the operation panel.)
• Set the surrounding air temperature to within the specifications.
Corrective action
• Clean the heat sink.
• Replace the cooling fan.
FN
E.OVT
E.THC
E.FIN
Causes and corrective actions
page 105.)

PROTECTIVE FUNCTIONS
page 105.)
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