Unable To Write Parameter Setting; Power Lamp Is Not Lit - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

6.6.13 Unable to write parameter setting

Check
point
Input Operation is being performed (the STF or
signal STR signal is ON).
Parameter setting was attempted in the
External operation mode.
Parameter write is disabled by the Pr.77
Parameter write selection setting.
The key lock mode is enabled by the
Pr.161 Frequency setting/key lock
Parameter
operation selection setting.
setting
Operation mode and a writing device do
not correspond.
Under PM sensorless vector control,
setting "25" in Pr.72 PWM frequency
selection was attempted. Or, setting PM
sensorless vector control was attempted
while Pr.72 = "25".

6.6.14 Power lamp is not lit

Check
point
Main
circuit
The wiring or installation is inadequate.
Control
circuit
774
6. PROTECTIVE FUNCTIONS
6.6 Check first when you have a trouble
Possible cause
Possible cause
Check for secure wiring and installation.
The power lamp is lit when power is supplied to the control circuit (R1/
L11, S1/L21).
Countermeasure
Stop the operation. When Pr.77 Parameter write selection = "0
(initial value)", writing is enabled only during a stop.
Choose the PU operation mode. Or, set Pr.77 Parameter write
selection = "2" to enable parameter writing regardless of the
operation mode.
Check the Pr.77 setting.
Check the Pr.161 setting.
Check Pr.79, Pr.338, Pr.339, Pr.550 and Pr.551, and select an
operation mode suitable for the purpose.
Under PM sensorless vector control, "25" cannot be set in Pr.72. (A
sine wave filter (MT-BSL/BSC) cannot be used under PM sensorless
vector control.)
Countermeasure
Refer to
page
328
328, 370
328
324
370, 380
339
Refer to
page
54