Mitsubishi Electric Mr.SLIM PU-P71VHA Service Manual page 48

Problem
The unit started even though
the start/stop button was not
pushed.
The unit stopped even though
the start/stop button was not
pushed.
The remote controller`s timer
cannot be set.
"FILTER" is displayed.
"STAND BY" is displayed.
OC379F
Solution
Is this timer on?
Press the start/stop button to stop
the unit.
Was a distant commend sent from
the remote controller?
Find out if the remote controller
was used.
Is the CENTRALLY CONTROLLED
indicator displayed?
Find out if the remote controller
was used.
Is the automatic (cooling/heating)
mode selected?
Press the start/ stop button to stop
the unit.
Is the timer on?
Press the start/stop button to
restart the unit.
Was a distant command sent from
the remote controller?
Find out if the remote controller
was used.
Is the CENTRALLY CONTROLLED
indicator displayed?
Find out if the remote controller
was used.
Set the schedule timer if one is
connected.
Indicates that it is time to clean the
air filter. Clean the air filter. Press
the FILTER button on the remote
controller twice to make the display
disappear.
See the instruction manual that
came with the product for how to
clean the filter.
Displayed when the unit starts
HEAT operation, when the air
conditioning function puts the
compressor in operation mode,
or when the outdoor unit ends
DEFROST operation and returns
to HEAT operation. The display
disappears after about 10 minutes.
"STAND BY" displayed on the
remote controller indicates that the
indoor unit's heat exchanger hasn't
fully heated up, so the blower air
volume is restricted. To prevent
cold air from being felt at this time,
the up/down vane is automatically
set to horizontal blow. When
"STAND BY" is released, the up/
down vane returns to the setting
specified by the remote controller.
Problem
"DEFROST" is displayed (no
air comes out the unit).
An error code is displayed in
the remote controller.
No display appears on the
wireless remote controller.
Signals are not received by the
thin sensor unless sent from
close up.
The operating display of the
wireless remote controller`s
receiver is flashing.
48
Solution
Frost adheres to the outdoor unit
when the outside air temperature
is low and the humidity is high.
This display indicates that the
DEFROST operation is being
performed to melt this frost. The
DEFROST operation ends after
about 10 minutes (15 minutes
maximum).
During the DEFROST operation,
the indoor unit's heat exchanger
becomes cold, so the blower is
stopped. The up/down vane is
automatically set to horizontal
blow. When the DEFROST
operation ends, the unit switches
to the HEAT SETUP operation.
A self-diagnostic function is being
performed to preserve the air
conditioner.
* Do not attempt to make repairs
yourself. Turn the main switch off
and contact the dealer from whom
you bought the air conditioner.
Provide him or her with the name
of the unit and the information
displayed in the remote controller.
The batteries are becoming weak.
Replace the batteries and press
the reset button.
* If the display does not appear
after replacing the batteries, make
sure that the (+,–) cells are aligned
correctly.
A self-diagnostic function is being
performed to preserve the air
conditioner.
* Do not attempt to make repairs
yourself. Turn the main switch off
and contact the dealer from whom
you bough the air conditioner.
Provide him or her with the name
of the unit.