Instruction manual

167
5
PROTECTIVE FUNCTIONS
Note:2. This function is activated only when OH has been set to any of Pr. 180 to Pr.
183 (input terminal function selection).
Operation Panel Indication E. FIN FR-PU04-MGI H/Sink O/Temp
Name Fin overheat
Description
If the heatsink overheats, the temperature sensor is actuated
to stop the inverter output.
Check point
• Check for too high ambient temperature.
• Check for heatsink clogging.
Corrective action Set the ambient temperature to within the specifications.
Operation Panel Indication E. BE FR-PU04-MGI
Br. Cct. Fault
(Note)
Name Brake transistor alarm detection
Description
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 point Check for improper braking duty.
Corrective action
Change the inverter.
Please contact your sales representative.
Operation Panel Indication E. GF FR-PU04-MGI Ground Fault
Name Output side ground fault overcurrent protection
Description
This function stops the inverter output if a ground fault overcurrent
flows due to a ground fault which occurred in the inverter's output
(load) side.
Check point Check for a ground fault in the motor and connection cable.
Corrective action Remedy the ground fault portion.
Operation Panel Indication E. OHT FR-PU04-MGI OH Fault
Name External thermal relay operation (Note 2)
Description
If the external thermal relay provided 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 point
•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).
Corrective action Reduce the load and operating duty.
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