Mitsubishi Electric PUZ-ZM60VHA2, Service Manual

Page: 60 / 140

60
OCH771
Phone Calls From Customers How to Respond Note
Something
is wrong with
the airflow
direction….
1
The airflow direction is
changed during COOL
operation.
1
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".
—
2
The airflow direction is
changed during HEAT
operation.
(The airflow direction
cannot be set by
remote controller.)
2
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.
"STANDBY" will be
displayed on the remote
controller in the case of
1
and
2
. "DEFROSTING"
will be displayed on the
screen in the case of
3
.
3
The airflow direction
does not change.
(Up/down vane, left/
right louver)
3
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.
—
The air conditioner starts operating
even though any buttons on the remote
controller are not pressed.
1
Check if you set ON/OFF timer.
The air conditioner starts operating at the time
designated if ON timer has been set before.
—
2
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.
There might be a case that
"Centrally controlled" will
not be displayed.
3
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".
—
The air conditioner stops even though
any buttons on the remote controller are
not pressed.
1
Check if you set ON/OFF timer.
The air conditioner stops operating at the time
designated if OFF timer has been set before.
There might be a case that
"Centrally controlled" will
not be displayed.
2
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.
A white mist is expelled from the indoor
unit.
This is not a malfunction.
This may occur when the operation is started in the room
of high humidity.
—
Water or moisture is expelled from the
outdoor unit.
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.
—
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.
Batteries are being exhausted. Replace them and press
the reset button of remote controller.
—