Midea MAD020T1N1S1 Technical Manual page 60

MCAC-PDSM-2013-04
 Compressor checking: Press the Set key, the setting temperature to be room temperature
minus 5°C, the relative humidity to be the same as the room temperature, and press enter
to observe the compressor whether operates or reverses. (The compressor reverse then it
will has abnormal voice.)
Note:
The compressor cannot be reversed over 30 seconds, and it should be judged immediately and
cut off the power.
Back to M0 page, and press Status to check the rising pressure of the compressor is
normal or not, and at the same time, the outdoor fan should be high speed operating, and
the stable pressure of the compressor should about 30bar.
 Cooling state detection: Press the Menu and press the Down button to check the current
mode is cooling or not.
 Dehumidification function detection: Press the Set to change the temperature as the
same as the room temperature, and relative humidity set to the room temperature minus
5%RH. Press enter and the compressor will be normally operated, and then press the
Menu, press Down key to check the current mode is dehumidification or not.
Humidification function detection: Operate the humidifier switch, press the Set to change

the temperature as the same as the room temperature, and the relative humidity set to be
the room temperature plus 5%RH, then press enter to check the compressor stops or not
and the humidifier starts to inlet water or not. Press the Status, find the li page, and check
the current flow of the humidifier whether increased gradually, and wait the action of the
humidification tank change from Water inletting to be Evaporating. Press Manual
drainage switch to drain off the water.
 The first grade heater detection: Operate two electrical heater switchs, press Set to set
the temperature to be room temperature plus 2°C, and the humidity stays the same as the
indoor humidity. Press enter to check whether stop humidifying and whether operate the
first grade electrical heating pipe, and then press Menu, Down key to check whether
display heating mode.
 The second grade heater detection: Press Set to set the temperature to be room
temperature plus 4°C, and the humidity stays the same as the indoor humidity. Press enter
to check whether operate the second grade electrical heating pipe, and then press Menu,
Down key to check whether display heating mode.
 Dehumidification heating mode: Press the Set button to change the relative humidity to
be indoor humidity minus 5%, press enter to check the compressor whether operates, and
then press Menu, Down to check whether display dehumidification heating mode.
Humidification heating status detection: Press Set to change the relative humidity to be

indoor humidity minus 5%, press OK to check the compressor whether stops and the
humidifier starts to inlet water and starts humidifying or not, at that time the humidification
tank will be getting hot, and then press Menu, Down to check whether display
humidification heating mode. Press Manual drainage switch to drain off the water.
Cooling humidification status detection: Press Set key to change the temperature to be

indoor temperature minus 5%, press enter, and operate the unit after the unit stops one
minute, to check whether continue humidifying or not; and press Menu, Down to check
whether display cooling humidification mode.
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Midea Precision AC Technical Manual-Down Delivery Series
59