Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 556 / 608

Check first when you have troubles Troubleshooting
7 - 28
7.6.9 Operation mode is not changed properly
7.6.10 Operation panel display is not operating
7.6.11 Motor current is too large
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 can-
not be changed.
6-206
Parameter
setting
Pr. 79 setting is improper.
When the Pr. 79 "Operation mode selection"
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 parameter unit (FR-PU04/FR-
PU07) is used) to switch to the PU operation
mode. For other values (1 to 4, 6, 7), the oper-
ation mode is limited accordingly.
6-206
Operation mode and a writing device do not
correspond.
Check Pr. 79, Pr. 338, Pr. 339, Pr. 550, Pr. 551,
and select an operation mode suitable for
the purpose.
6-206,
6-220
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 opera-
tion command source selection". (If parame-
ter unit (FR-PU04/FR-PU07) is connected
while Pr. 551 = "9999" (initial setting), all the
operation mode displays ( )
turn OFF.)
6-220
Check Points Possible Cause Countermeasures
Refer to
Page
Parameter
setting
Torque boost (Pr. 0, Pr. 46) setting is improper
under V/F control, so the stall prevention
function is activated.
Increase/decrease Pr. 0 "Torque boost" set-
ting value by 0.5% increments to the setting.
6-35
V/F pattern is improper when V/F control is
performed. (Pr. 3, Pr. 14, Pr. 19)
Set rated frequency of the motor to Pr. 3
"Base frequency". Use Pr. 19 "Base frequency
voltage" to set the base voltage (e.g. rated
motor voltage).
6-56
Change Pr. 14 "Load pattern selection"
according to the load characteristic.
6-58
Stall prevention function is activated due to a
heavy load.
Reduce the load weight. —
Set Pr. 22 "Stall prevention operation level"
higher according to the load. (Setting Pr. 22
too large may result in frequent overcurrent
trip (E.OC
첸
).)
6-44
Check the capacities of the inverter and the
motor.
—
Auto tuning is not performed under
Advanced magnetic flux vector control or
General-purpose magnetic flux vector
control.
Perform offline auto tuning. 6-90