Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual page 61

Phone Calls From Customers
Something
The airflow direction is
is wrong with
changed during COOL
the airflow
operation.
direction....
The airflow direction is
changed during HEAT
operation.
(The airflow direction
cannot be set by
remote controller.)
The airflow direction
does not change.
(Up/down vane, left/
right louver)
The air conditioner starts operating
even though any buttons on the remote
controller are not pressed.
The air conditioner stops even though
any buttons on the remote controller are
not pressed.
A white mist is expelled from the indoor
unit.
Water or moisture is expelled from the
outdoor unit.
The display of wireless remote controller
gets dim or does not come on.
The indoor unit does not receive a
signal from remote controller at a long
distance.
OCH771C
How to Respond
If the up/down vane is set to downward in COOL
operation, it will be automatically set to horizontal blow
by the microprocessor in order to prevent water from
dropping down.
"1 h" will be displayed on the remote controller if the up/
down vane is set to downward with the fan speed set
to be less than "LOW".
In HEAT operation, the up/down vane is automatically
controlled according to the temperature of the indoor
unit's heat exchanger.
In the following cases written below, the up/down vane
will be set to horizontal blow, and the setting cannot be
changed by remote controller.
1) At the beginning of the HEAT operation
2) While the outdoor unit is being stopped by thermostat
or when the outdoor unit gets started to operate.
3) During DEFROST operation
The airflow direction will be back to the setting of
remote controller when the above situations are
released.
1) Check if the vane is set to a fixed position.
(Check if the vane motor connector is removed.)
2) Check if the air conditioner has a function for
switching the air direction.
3) If the air conditioner does not have that function,
"Unsupported function" will be dsplayed on the
remote controller when "AIR DIRECTION" or
"LOUVER" button is pressed.
Check if you set ON/OFF timer.
The air conditioner starts operating at the time
designated if ON timer has been set before.
Check if any operations are ordered by distant control
system or the central remote controller.
While "Centrally controlled" is displayed on the remote
controller, the air conditioner is under the control of
external directive.
Check if power is recovered from power failure
(black out).
The units will automatically start operating when power
is recovered after power failure (black out) occurs. This
function is called "auto recovery feature from power".
Check if you set ON/OFF timer.
The air conditioner stops operating at the time
designated if OFF timer has been set before.
Check if any operations are ordered by distant control
system or the central remote controller.
While "Centrally controlled" is displayed on the remote
controller, the air conditioner is under the control of
external directive.
This is not a malfunction.
This may occur when the operation is started in the room
of high humidity.
COOL: when pipes or piping joints are cooled, they sweat
and water drips down.
HEAT: |water drips down from the heat exchanger.
Note: Make use of optional parts "Drain Socket" and
"Drain pan" if these water needs to be collected and
drained out for once.
Batteries are being exhausted. Replace them and press
the reset button of remote controller.
61
Note
—
"STANDBY" will be
displayed on the remote
controller in the case of
and . "DEFROSTING"
will be displayed on the
screen in the case of .
—
—
There might be a case that
"Centrally controlled" will
not be displayed.
—
There might be a case that
"Centrally controlled" will
not be displayed.
—
—
—