Mitsubishi Electric PUZ-A18NHA6 Service Manual page 46

Symptoms: "PLEASE WAIT" is kept being displayed on the remote controller.
Diagnosis flow
Check the display time of "PLEASE WAIT"
after turning on the main power.
6 minutes
or more
Check the LED display of the
outdoor controller circuit board.
Are any check codes
displayed on the LED?
NO
2 minutes
or less
How long is "PLEASE WAIT"
kept being displayed on the
remote controller?
2 to 6
minutes
Are any check codes
NO
displayed on the
remote controller?
YES
YES
Inspection method and
Cause
troubleshooting
"PLEASE WAIT"
will be displayed The start-up diagnosis will
during the start-up be over in around 2 minutes.
diagnosis after turning
on the main power.
outdoor connecting action table" in order to
wire solve the trouble.
outdoor connecting
wire (S3) errors, the display of
remote controller may not
controller board match the LED display of
the outdoor unit.
controller circuit
board
controller board
controller