Unable To Write Parameter Setting; Power Lamp Is Not Lit - Mitsubishi Electric FR-A800 Series 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 operation
Parameter
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
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Possible cause
Possible cause
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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
Check for secure wiring and installation.
The power lamp is lit when power is supplied to the control circuit (R1/
L11, S1/L21).
Refer to
345
345,
345
341
389,
356
Refer to
54
6. PROTECTIVE FUNCTIONS
6.6 Check first when you have a trouble
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