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5
5 CHECK FIRST WHEN YOU HAVE A TROUBLE
5.1 Troubleshooting
If a fault occurs and the inverter 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 Possible causes Check point Corrective action
The LCD or backlight of the
parameter unit does not light.
Connection fault of the
parameter unit
Check that the parameter unit
is connected properly.
Or check that the PU cable is
inserted far into the PU
connector.
Check the connection of
the parameter unit and
the PU cable.
The setting of Pr. 991 PU
contrast adjustment is changed
from the initial value.
Check the Pr. 991 setting.
Return the Pr. 991 setting
to the initial value using
the operation panel.
The inverter is in the standby
status.
Check whether the PU cable
is disconnected.
Check the connection of
the PU cable.
Check whether the RES
signal of the inverter is ON.
Turn OFF the RES signal
of the inverter.
Battery exhaustion of FR-
PU07BB, disconnection of the
AC adapter
Check whether the battery of
FR-PU07BB is run down.
Change the battery.
Check whether the AC
adapter is disconnected.
Check for connection of
the AC adapter.