Check First When You Have Trouble; Troubleshooting - Mitsubishi Electric FR-LU08 Instruction Manual

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CHECK FIRST WHEN YOU HAVE TROUBLE

4.1

Troubleshooting

If a fault occurs and the product fails to operate properly, locate the cause of the fault and take proper corrective action by
referring to the troubleshooting table below. Contact your local sales representative if the corresponding information is not
found in the table, the inverter has problem, or the component parts are damaged.
Status
The LCD or backlight of the
operation panel is OFF.
During inverter reset, the
following screen remains.
Ready
PU to Inverter
Comms, Error
INV. Reset ON
Possible causes
Connection fault of the operation
panel
The setting of Pr.991 PU
contrast adjustment has
changed from the initial value.
Connection fault of the operation
panel
The RES signal is ON.
Check point
Check that the operation panel is
properly connected.
Check that the PU cable is fully
inserted into the PU connector.
Check the Pr.991 setting.
Check that the operation panel is
properly connected.
Check that the PU cable is fully
inserted into the PU connector.
Check the terminal RES.
CHECK FIRST WHEN YOU HAVE TROUBLE
Corrective action
Check the connection of the
operation panel and the PU
cable.
Using the FR-DU08(-01), return
the setting of Pr.991 to the initial
value.
Check the connection of the
operation panel and the PU
cable.
Turn OFF the terminal RES.
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