Mitsubishi Electric Mr.Slim PUZ-SM100VKA Service Manual page 57

• Before repair <Frequent calls from customers>
Phone Calls From Customers
Unit does 1 The operating display of remote
not operate controller does not come on.
at all.
2 Unit cannot be restarted for a
while after it's stopped.
3 Check code appears and blinks
on the display of remote
controller.
Remote 1 "PLEASE WAIT" is displayed
controller
on the screen.
2 "FILTER" is displayed on the
screen.
The room cannot be cooled or sufficiently
air-conditioned.
1 A gas escaping sound is heard
Sound
sometimes.
comes out
from the air
conditioner. 2 A cracking sound is heard
sometimes.
3 A buzzing sound is heard
sometimes.
OCH708
How to Respond
1 Check if power is supplied to air conditioner.
Nothing appears on the display unless power is
supplied.
2 Wait around 3 minutes to restart unit.
The air conditioner is in a state of being protected
by the microcomputer's directive. Once the
compressor is stopped, the unit cannot be
restarted for 3 minutes. This control is also applied
when the unit is turned on and off by remote
controller.
3 Check code will be displayed if any protection
devices of the air conditioner are actuated.
What is check code?
1 Wait around 2 minutes.
An automatic startup test will be conducted for
2 minutes when power is supplied to the air
conditioner. "PLEASE WAIT" will be kept being
displayed while that time.
2 This indicates that it is time to clean the air filters.
Clean the air filters. Press the FILTER button on
the remote controller twice to clear "FILTER" from
the display.
See the operation manual that came with the
product for how to clean the filters.
1 Check the set temperature of remote controller.
The outdoor unit cannot be operated if the set
temperature is not appropriate.
The outdoor unit operates in the following condition:
When the set temperature is lower than the room
temperature.
2 Check if filters are not dirty and clogged. If filters
are clogged, the airflow amount will be reduced
and the unit capacity will be lowered. See the
instruction manual that came with the product for
how to clean the filters.
3 Check there is enough space around the air
conditioner.
If there are any obstacles in the air intake or air
outlet of indoor/outdoor units, they block the
airflow direction so that the unit capacity will be
lowered.
1 This is not a malfunction.
This is the sound which is heard when the flow of
refrigerant in the air conditioner is switched.
2 This is not a malfunction.
This is the sound which is heard when internal
parts of units expand or contract when the
temperature changes.
3 This is not a malfunction.
This is the sound which is heard when the outdoor
unit starts operating.
57
Note
Refer to "SELF-DIAGNOSIS
ACTION TABLE".
Check if servicing is
required for the error.
Display time of "FILTER"
depends on the model.
Long life filter: 2500 hrs.
Standard filter: 100 hrs.
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