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Mitsubishi Electric FR-E520 Instruction Manual Page 199

Transistorized inverter.
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Operation Panel Indication
Name
Description
Check point
Corrective action
Operation Panel Indication
Name
Description
Check point
Corrective action
Note: 2. This function is activated only when the optional brake resistor is connected.
Operation Panel Indication
Name
Description
Check point
Corrective action
Operation Panel Indication
Name
Description
Check point
Corrective action
Note: 3. This function is activated only when OH has been set to any of Pr. 180 to Pr.
183 (input terminal function selection).
E. FIN
Fin overheat
If the heatsink overheats, the temperature sensor is actuated
to stop the inverter output.
• Check for too high ambient temperature.
• Check for heatsink clogging.
Set the ambient temperature to within the specifications.
E. BE
Brake transistor alarm detection (Note 2)
If a brake transistor fault occurs due to excessively large
regenerative energy from the motor, for example, that fault is
detected to stop the inverter output. In this case, the inverter
power must be switched off immediately.
Check for improper braking duty.
Change the inverter.
Please contact your sales representative.
E. GF
Output side earth (ground) fault overcurrent protection
This function stops the inverter output if an earth (ground) fault
overcurrent flows due to an earth (ground) fault which occurred in
the inverter's output (load) side. Use Pr. 249 "ground fault detection
at start" to set whether the protective function is to be activated or
not. (The 400V class always has the protective function.)
Check for an earth (ground) fault in the motor and connection
cable.
Remedy the earth (ground) fault portion.
E. OHT
External thermal relay operation (Note 3)
If the external thermal relay designed for motor overheat
protection or the internally mounted temperature relay in the
motor switches on (contacts open), the inverter output is
stopped. If the relay contacts are reset automatically, the
inverter will not restart unless it is reset.
•Check for motor overheating.
•Check that the value of 7 (OH signal) is set correctly in any of
Pr. 180 to Pr. 183 (input terminal function selection).
Reduce the load and operating duty.
189
PROTECTIVE FUNCTIONS
FR-PU04 H/Sink O/Temp
FR-PU04 Br. Cct. Fault (Note)
FR-PU04
Ground Fault
FR-PU04
OH Fault
5

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