Midea MCD-18HRFN1-QRC4 Service Manual page 104

Electrical Control Function
1.3 Operation Modes and Functions
1.3.1 Fan mode
(1) Outdoor fan and compressor stop.
(2) Temperature setting function is disabled, and no setting temperature is displayed.
(3) For Console& Compact cassette(12K): Indoor fan can be set to high/med/low/ breeze, for other models:
Indoor fan can be set to high/(med)/low/auto;
(4) The louver operates same as in cooling mode.
(5) Auto fan:
For Console:
T 1 - 2 4
For Compact cassette(12K)、A5(12K)
For other models:
1.3.2 Cooling Mode
1.3.2.1 Outdoor PMW open angle control
The unit is working in cooling mode with the EXV open 300P(For 12K, it is 220P) for 3 minutes, then
adjusting PMW open angle according to the temperature of compressor discharge every 2 minutes.
110
6 . 0
a
5 . 0
b
4 . 0
c
2 . 5
d
1 . 0
e
3.5
3.0
1.5
1.0
5.0
4.0
3.0
2.0
H
( H - L ) * 0 . 7 5 + L
( H - L ) * 0 . 5 + L
( H - L ) * 0 . 2 5 + L
L
High
Medium
Low
Ts=24
High
Medium
Low
Ts=24
Electrical Control System