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PROTECTIVE FUNCTIONS
132
FR-PU04 Indication
CPU Fault
Name
CPU error
Description
If the arithmetic operation of the built-in CPU does not end within a
predetermined period, the inverter self-determines it as an alarm and
stops the output.
Check point
Corrective action
Please contact your sales representative.
FR-PU04 Indication
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.
(2) Minor fault
The output is not shut off when the protective function is activated. You can make
parameter setting to output the minor fault signal. (Set "98" in Pr. 192 "A, B, C terminal
(ABC) function selection". Refer to page 120.)
FR-PU04 Indication
Fan Failure
Name
Fan fault
Description
For the inverter which contains a cooling fan, this indication appears
when the cooling fan stops due to a fault or operates differently from
the setting of Pr. 244 "cooling fan operation selection".
Check point
Check the cooling fan for a fault.
Corrective action
Change the fan.
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