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

4

CHECK FIRST WHEN YOU HAVE A 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 below. If the corresponding information is not found in the table, the inverter has problem, or the
component parts are damaged, contact your sales representative.
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
36
CHECK FIRST WHEN YOU HAVE A TROUBLE
Possible causes
Connection fault of the operation
panel
The setting of Pr.991 PU
contrast adjustment is 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.
Corrective action
Check the connection of the
operation panel and the PU
cable.
Using the operation panel, 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.