Unable To Write Parameter Setting; Power Lamp Is Not Lit - Mitsubishi Electric FR-F740 EC Instruction Manual

Troubleshooting
7.6.13

Unable to write parameter setting

Check points Possible cause
Input signal
Parameter
Setting
7.6.14

Power lamp is not lit

Check points Possible cause
Main Circuit,
Control Circuit
FR-F700 EC
Operation is being performed (signal STF
or STR is ON).
You are attempting to set the parameter in
the External operation mode.
Parameter is disabled by the Pr. 77
"Parameter write selection" setting.
Key lock is activated by the Pr. 161 "Fre-
quency setting/key lock operation selec-
tion" setting.
Operation mode and a writing device do
not correspond.
Wiring or installation is improper.
Check first when you have troubles
Countermeasures
Stop the operation.
When Pr. 77 = "0" (initial value), write is
enabled only during a stop.
Choose the PU operation mode.
Or, set Pr. 77 = "2" to enable parameter
write regardless of the operation mode.
Check Pr. 77 "Parameter write selection"
setting.
Check Pr. 161 "Frequency setting/key lock
operation selection" setting.
Check Pr. 79, Pr. 338, Pr. 339, Pr. 550 and
Pr. 551, and select an operation mode
suitable for the purpose.
Countermeasures
Check for the wiring and the installation.
Power lamp is lit when power supply is
input to the control circuit (R1/L11, S1/L21).
Refer to
page
6-218
6-218
6-218
6-409
6-229,
6-244
Refer to
page
3-7
7 - 35