Mitsubishi Electric FR-F820-00077 Instruction Manual page 741

Parameters
NOTES "1" and "Er4" are displayed alternately... Why?
The inverter is not in the PU operation mode.
Press PU/EXT key.
Press SET key to clear the parameter.
Stop the inverter first. A writing error occurs if a parameter clear is attempted while the inverter is
running.
To perform a parameter clear, the inverter must be in the PU operation mode even if "2" is set to
Pr. 77.
For availability of parameter clear and all parameter clear for each parameter, refer to the parame-
ter list on page A-5.
FR-F800
is lit, and "1" appears on the monitor. (When Pr. 79 = "0" (initial value))
Parameter clear / all parameter clear
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