Mitsubishi Electric PUHY-HP200 Service Handbook page 83

[ VI Refrigerant Circuit ]
2. Indoor Unit
Part Symbol
Name (functions)
Linear LEV
expan-
sion valve
Thermis- TH1
tor (Suction air
temperature)
TH2
(Pipe temper-
ature)
TH3
(Gas pipe
temperature)
TH4
Outdoor air
temperature)
Temperature
sensor (In-
door air tem-
perature)
HWE08110
Notes Usage
1) Adjusts superheat at the
indoor heat exchanger
outlet during cooling
2) Adjusts subcool at the
heat exchanger outlet of
the indoor unit during
cooling
Indoor unit control (Thermo)
1) Indoor unit control (Frost
prevention, Hot adjust)
2) LEV control during heat-
ing operation (subcool
detection).
LEV control during cooling op-
eration (superheat detection)
Indoor unit control (Thermo)
Indoor unit control (Thermo)
Specification
DC12V
Opening of stepping motor
driving valve 0-(1800) puls-
es
R =15k
0
R =3460
0/80
Rt =
15exp{3460(
273+t
0°C [32°F]:15kohm
10°C [50°F] :9.7kohm
20°C [68°F]:6.4kohm
25°C [77°F] :5.3kohm
30°C [86°F] :4.3kohm
40°C [104°F] :3.1kohm
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Check method
Refer to the section
"Continuity Test with a
Tester".
Continuity between
white, red, and or-
ange.
Continuity between
yellow, brown, and
blue.
White
Red
Orange
Yellow
Resistance check
1 1
- )}
273
M
Brown Blue
GB