69
Causes and corrective actions
*4
Functions only when any of
Pr. 178 to Pr. 189 (input terminal function selection)
is set to OH.
Operation Panel
Indication
E.ILF
FR-PU04
Fault 14
Name
Input phase failure
Description
This alarm is output when function valid setting (=1) is set in
Pr. 872 Input phase failure protection selection
and
one phase of the three phase power input opens.
(Refer to
Instruction Manual (applied).)
Check point
Check for a break in the cable for the three-phase power supply input.
Corrective action
· Wire the cables properly.
· Repair a brake portion in the cable.
· Check the
Pr. 872 Input phase failure protection selection
setting.
Operation Panel
Indication
E.OLT
FR-PU04
Still Prev STP ( OL shown during stall
prevention operation)
Name
Stall prevention
Description
If the frequency has fallen to 0.5Hz by stall prevention operation and remains for 3s, an alarm (E.OLT)
appears to shutoff the inverter output. OL appears while stall prevention is being activated.
Check point
· Check the motor for use under overload.
(Refer to
Instruction Manual (applied).)
Corrective action
· Reduce the load weight.
Operation Panel
Indication
E.GF
FR-PU04
Ground Fault
Name
Output side earth fault overcurrent
Description
This function stops the inverter output if an earth fault overcurrent flows due to an earth fault that
occurred on the inverter's output (load) side.
Check point
Check for an earth fault in the motor and connection cable.
Corrective action
Remedy the earth fault portion.
Operation Panel
Indication
E.LF
FR-PU04
Name
Output phase failure
Description
This function stops the inverter output if one of the three phases (U, V, W) on the inverter's output side
(load side) opens.
Check point
· Check the wiring (Check that the motor is normal.)
· Check that the capacity of the motor used is not smaller than that of the inverter.
Corrective action
· Wire the cables properly.
· Check the
Pr. 251 Output phase failure protection selection
setting.
Operation Panel
Indication
E.OHT
FR-PU04
OH Fault
Name
External thermal relay operation
Description
If the external thermal relay provided for motor overheat protection, or the internally mounted
temperature relay in the motor, etc. switches on (contacts open), the inverter output is stopped.
Check point
· Check for motor overheating.
· Check that the value of 7 (OH signal) is set correctly in any of
Pr. 178 to Pr. 189 (input terminal function
selection)
.
Corrective action
· Reduce the load and operating duty.
· Even if the relay contacts are reset automatically, the inverter will not restart unless it is reset.
Operation Panel
Indication
E.PTC
FR-PU04
Fault 14
Name
PTC thermistor operation
Description
Appears when the motor overheat status is detected for 10s or more by the external PTC thermistor
input connected to the terminal AU.
Check point
· Check the connection between the PTC thermistor switch and thermal protector.
· Check the motor for operation under overload.
· Is valid setting ( = 63) selected in
Pr. 184 AU terminal function selection
?
(Refer to
Instruction
Manual (applied).)
Corrective action
Reduce the load weight.
Summary of Contents for FR-F 700 EC
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