Gree GUHN48NM3A1O - Main Logic; Cooling; Dry Mode

31
U-MATCH Air
Conditioners
Service Manual
DPOUSPM
2 MAIN LOGIC
2.1 Cooling
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
Compressor
1S
5S
15S
Outdoor fan
Indoor fan
4-way valve
Starting up
Cooling mode
Manual shutdown
H grade
Operation at
a set speed
Time
When T
amb.
7
preset t
+1
o
C, the unit begins cooling operation and the compressor and the outdoor fan are
running; and the indoor fan is running at a set speed.
When T
amb.
W7
preset
-1
o
C, the unit is in the cooling shutdown state, and the compressor and the outdoor fan
stop running; and the indoor fan is running at a set speed.
When T
preset
-1
o
C< T
amb.
< T
preset
+1
o
C, the unit keeps in the operation state.
2.2 Dry Mode
1S
5S
15S
Compressor
Outdoor fan
Indoor fan
4-way valve
Starting up
Dry mode
Manual shutdown
H grade
Operation at
a set speed
Time
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
When T
amb.
7
preset
+2
o
C, the unit begins cooling operation and the compressor and the outdoor fan are
running; and the indoor fan is running at a low speed.
When T
amb.
7
preset
-2
o
C, the unit is in the cooling shutdown state and the compressor and the outdoor fan
stop running.
When T
prese
-2
o
C< T
amb.
< T
preset
+2
o
C, the unit is in the six-minute stop and four-minute operation state, that
is, the compressor runs for 6 minutes and then stops for 4 minutes, in such cycle repeatedly; and the indoor fan
operates at a low speed.