Mitsubishi Electric FR-D720S SC EC, Instruction Manual

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Troubleshooting Check first when you have troubles
FR-D700 SC EC 7 - 27
7.6.9 Operation mode is not changed properly
7.6.10 Operation panel display is not operating
Check points Possible Cause Countermeasures
Refer to
Page
Input signal Start signal (STF or STR) is ON.
Check that the STF and STR signals are
OFF. When either is ON, the operation
mode cannot be changed.
6-172
Parameter
Setting
Pr. 79 setting is improper.
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.
6-172
Operation mode and a writing device do
not correspond.
Check Pr. 79, Pr. 338, Pr. 339 and Pr. 551,
and select an operation mode suitable for
the purpose.
6-172,
6-186
Check points Possible Cause Countermeasures
Refer to
Page
Main Circuit Wiring or installation is improper.
Check for the wiring and the installation.
3-4
Make sure that the connector is fitted
securely across terminal P/+ and P1.
Control Circuit Power is not input. Input the power. 3-4
Parameter
Setting
Command sources at the PU operation
mode is not be the operation panel. (None
of the operation mode displays
( ) is lit.)
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.)
6-186