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Causes and corrective actions
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
278
E.PTC
PTC thermistor operation
Trips when the motor overheat status is detected for 10s or more by the external PTC thermistor input
connected to the terminal AU.
This fault functions when "63" is set in Pr. 184 AU terminal function selection and AU/PTC switchover
switch is set in PTC side. When the initial value (Pr. 184 = "4") is set, this protective function does not
function.
· Check the connection between the PTC thermistor switch and thermal relay protector.
· Check the motor for operation under overload.
· Is valid setting ( = 63) selected in Pr. 184 AU terminal function selection ? (Refer to
Reduce the load weight.
E.OPT
Option fault
Appears when the AC power supply is connected to the terminal R/L1, S/L2, T/L3 accidentally when a
high power factor converter is connected. Appears when the switch for the manufacturer setting of the
plug-in option is changed.
· Check that the AC power supply is not connected to the terminal R/L1, S/L2, T/L3 when a high
power factor converter (FR-HC, MT-HC) or power regeneration common converter (FR-CV) is
connected.
· Check the parameter (Pr. 30) setting and wiring.
· The inverter may be damaged if the AC power supply is connected to the terminal R/L1, S/L2, T/L3
when a high power factor converter is connected. Please contact your sales representative.
· Return the switch for the manufacturer setting of the plug-in option to the initial status. (Refer to
instruction manual of each option)
E.OP1
Communication option fault
Stops the inverter output when a communication line fault occurs in the communication option.
· Check for a wrong option function setting and operation.
· Check that the plug-in option is plugged into the connector securely.
· Check for a break in the communication cable.
· Check that the terminating resistor is fitted properly.
· Check the option function setting, etc.
· Connect the plug-in option securely.
· Check the connection of communication cable.
E. 1
Option fault
Stops the inverter output if a contact fault or the like of the connector between the inverter and
communication option occurs.
Appears when the switch for the manufacturer setting of the plug-in option is changed.
1. Check that the plug-in option is plugged into the connector securely.
2. Check for excess electrical noises around the inverter.
1. Connect the plug-in option securely.
2. Take measures against noises if there are devices producing excess electrical noises around the
inverter.
If the problem still persists after taking the above measure, please contact your sales representative
or distributor.
3. Return the switch position for the manufacturer setting of the plug-in option to the initial status. (Refer
to instruction manual of each option)
E.PE
Parameter storage device fault (control circuit board)
Trips when a fault occurred in the parameter stored. (EEPROM failure)
Check for too many number of parameter write times.
Please contact your sales representative.
When performing parameter write frequently for communication purposes, set "1" in Pr. 342 to enable
RAM write. Note that powering off returns the inverter to the status before RAM write.
FR-PU04
Fault 14
FR-PU07
PTC activated
FR-PU04
Option Fault
FR-PU07
FR-PU04
Option 1 Fault
FR-PU07
FR-PU04
Fault 1
FR-PU07
FR-PU04
Corrupt Memry
FR-PU07
page 98, 110.)

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