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208
Check first when you have a trouble
6.5.11 Motor current is too large
6.5.12 Speed does not accelerate
6.5.13 Unable to write parameter setting
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 setting value by
0.5% increments to the setting.
94
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).
107
Change Pr. 14 Load pattern selection according to the load
characteristic.
109
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).)
101
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. 127
Check
points
Possible Cause Countermeasures
Refer
to
page
Parameter
Setting
Pr. 1, Pr. 2, Pr. 18 settings are improper.
Check the settings of Pr. 1 Maximum frequency and Pr. 2
Minimum frequency. If you want to run the motor at 120Hz
or higher, set Pr. 18 High speed maximum frequency.
105
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 setting value by
0.5% increments so that stall prevention does not occur.
94
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).
107
Change Pr. 14 Load pattern selection according to the load
characteristic.
109
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).)
101
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. 127
Main
Circuit
Brake resistor is connected between terminal P/+ and
P1 or between terminal P1 and PR by mistake.
Connect an optional brake transistor (MRS type, MYS
type, FR-ABR) between terminal P/+ and PR.
25
Check
points
Possible Cause Countermeasures
Refer
to
page
Input
signal
Operation is being performed (signal STF or STR is
ON).
Stop the operation.
When Pr. 77 = "0" (initial value), write is enabled only
during a stop.
166
"0" is set in the X12 signal (Bit11), which gives a control
input command through FL remote communication.
Set "1" in the X12 signal (Bit11), which gives a control
input command through FL remote communication.
57
Parameter
Setting
You are attempting to set a parameter from the
operation panel while in Network operation mode.
Choose the PU operation mode.
Or, set Pr. 77 = "2" to enable parameter write regardless
of the operation mode.
166
Parameter is disabled by the Pr. 77 Parameter write
selection setting.
Check Pr. 77 Parameter write selection setting.
166
Key lock is activated by the Pr. 161 Frequency setting/key
lock operation selection setting.
Check Pr. 161 Frequency setting/key lock operation selection
setting.
183