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Mitsubishi Electric PURY-P72 Service Handbook page 128

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[VI
Refrigerant Circuit]
2. Indoor Unit
Part
Symbol
Notes
Usage
Specification
Check method
Name
(functions)
Linear
LEV
1) Adjusts superheat at the
DC12V
Refer to the section
expan-
indoor heat exchanger
Opening of stepping motor
"Continuity Test with a
sion valve
outlet during cooling
driving valve 0-(1400) puls-
Tester".
2) Adjusts subcool at the
es
Continuity between
heat exchanger outlet of
white, red, and or-
the indoor unit during
ange.
Continuity between
cooling
yellow, brown, and
blue.
~3
@
Red
I n
Orang
Yellow
Brown
Blue
Thermis-
TH1
Indoor unit control (Thermo)
Resistance check
tor
(Suction air
Ro=15krl
temperature)
ROI8o=3460
R\=
1
1
TH2
1) Indoor unit control (Frost
15exp{3460( 273+(
m)}
(Pipe temper-
prevention, Hot adjust)
ature)
2) LEV control during heat-
ODC [32°F]:15kohm
ing operation (subcool
10°C [50°F] :9.7kohm
20°C [68°F]:6.4kohm
detection).
25°C (77°F] :5.3kohm
TH3
LEV control during cooling op-
30°C [86°F] :4.3kohm
(Gas pipe
eration (superheat detection)
40°C [104°F] :3.1kohm
temperature)
TH4
Indoor unit control (Thermo)
Outdoor air
temperature)
Temperature
Indoor unit control (Thermo)
sensor (In-
door air tem-
perature)
HWEOB03A
- 118 -
GB
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