Operation Mode Is Not Changed Properly - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Troubleshooting
7.6.9

Operation mode is not changed properly

Check points Possible Cause
Input signal
Parameter
Setting
7.6.10 Operation panel display is not operating
Check points Possible Cause
Main Circuit
Control Circuit Power is not input.
Parameter
Setting
FR-D700 SC EC
Start signal (STF or STR) is ON.
Pr. 79 setting is improper.
Operation mode and a writing device do
not correspond.
Wiring or installation is improper.
Command sources at the PU operation
mode is not be the operation panel. (None
of the operation mode displays
( ) is lit.)
Check first when you have troubles
Countermeasures
Check that the STF and STR signals are
OFF. When either is ON, the operation
mode cannot be changed.
When the Pr. 79 "Operation mode selec-
tion" setting is "0" (initial value), the
inverter is placed in the external operation
mode at input power-on. At this time,
press the PU/EXT key on the operation
panel (press the PU key when the param-
eter unit (FR-PU04/FR-PU07) is used) to
switch to the PU operation mode. For
other values (1 to 4, 6, 7), the operation
mode is limited accordingly.
Check Pr. 79, Pr. 338, Pr. 339 and Pr. 551,
and select an operation mode suitable for
the purpose.
Countermeasures
Check for the wiring and the installation.
Make sure that the connector is fitted
securely across terminal P/+ and P1.
Input the power.
Check the setting of Pr. 551 "PU mode
operation command source selection".
(If parameter unit (FR-PU04/FR-PU07) is
connected while Pr. 551 = "9999" (initial
setting), all the operation mode displays
( ) turn OFF.)
Refer to
Page
6-172
6-172
6-172,
6-186
Refer to
Page
3-4
3-4
6-186
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