Instruction manual

170
PROTECTIVE FUNCTIONS
Operation Panel Indication E. P24 FR-PU04-MGI Pr.24 alarm
Name 24VDC power output short circuit
Description
When the 24VDC power output from the PC terminal is
shorted, this function shuts off the power output. At this time,
all external contact inputs switch off. The inverter cannot be
reset by entering the RES signal. To reset it, use the operation
panel or switch power off, then on again.
Check point Check for a short circuit in the PC terminal output.
Corrective action Remedy the ground fault portion.
Operation Panel Indication E. LF FR-PU04-MGI E. LF
Name Output phase failure protection
Description
This function stops the inverter output if one of the three
phases (U, V, W) on the inverter's output side (load side)
results in open phase.
Check point
• Check the wiring (Check the motor for a fault.)
• Check that the capacity of the used motor is not smaller than
the inverter capacity.
Corrective action
• Wire the cables properly.
• Check the setting of Pr. 251 "output phase failure protection
selection".
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