Mitsubishi Electric FR-F820-00046, Instruction Manual

Page: 854 / 940

Check first when you have a trouble Protective functions
6 - 42
6.6.13 Unable to write parameter setting
6.6.14 Power lamp is not lit
Check
points
Possible cause Countermeasure
Refer to
page
Input
signal Operation is being performed (signal STF or
STR is ON).
Stop the operation.
When Pr. 77 "Parameter write selection" = "0"
(initial value), write is enabled only during a
stop.
5-72
Parameter
setting
You are attempting to set the parameter in
the External operation mode.
Choose the PU operation mode.
Or, set Pr. 77 "Parameter write selection" = "2" to
enable parameter write regardless of the
operation mode.
5-72,
5-119
Parameter write is disabled by the Pr. 77
"Parameter write selection" setting.
Check the Pr. 77 setting. 5-72
Key lock mode is enabled by the Pr. 161
"Frequency setting/key lock operation
selection" setting.
Check the Pr. 161 setting. 5-69
Operation mode and a writing device do
not correspond.
Check Pr. 79, Pr. 338, Pr. 339, Pr. 550 and Pr. 551,
and select an operation mode suitable for the
purpose.
5-119,
5-130
Pr. 72 "PWM frequency selection" was
attempted to be set to "25".
Alternatively, PM motor control was
attempted while Pr. 72 = "25".
Pr. 72 = "25" cannot be set under PM motor
control. (A sine wave filter (MT-BSL/BSC) cannot
be used under PM motor control.)
5-88
Check
points
Possible cause Countermeasure
Refer to
page
Main
circuit
Wiring or installation is improper.
Check for the wiring and the installation.
Power lamp is lit when power is supplied to the
control circuit (R1/L11, S1/L21).
2-33
Control
circuit