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[
VI
Refrigerant Circuit ]
2. Indoor unit
Part
name
Symbols
(functions)
Notes
Usage
Specifications
Check method
Linear ex-
pansion
valve
(LEV)
LEV
1.Adjusts superheat at the heat
exchanger outlet of the indoor
unit during cooling
2.Adjusts subcool at the heat
exchanger outlet of the indoor
unit during cooling
DC12V
Opening of a valve driven by
a stepping motor
0-(1400) pulses
Refer to the sec-
tion "
Ⅸ
[4] -6-
LEV".
Continuity be-
tween white, red,
and orange.
Continuity be-
tween yellow,
brown, and blue.
Ther-
mistor
TH1
(Suction
air tem-
perature)
Indoor unit control (Thermo)
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
Resistance check
TH2
(Pipe tem-
perature)
1.Indoor unit control (Freeze
prevention, Pre-heating
stand-by)
2.LEV control during heating
operation (Subcool detection)
TH3
(Gas pipe
tempera-
ture)
LEV control during cooling oper-
ation (Superheat detection)
TH4
(Outdoor
tempera-
ture)
Indoor unit control (Thermo)
Tempera-
ture
sensor
(Indoor
tempera-
ture)
Indoor unit control (Thermo)
Yellow
M
Blue
Brown
White
Red
Orange
R = 15k
0
R = 3460
R = 15
0/80
t
3460 273 t
1
273
1
exp
Содержание PUHY-P168
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Страница 99: ... 90 III Outdoor Unit BC Controller Components 2 RELAY BOARD RELAY 4 board 3 RELAY BOARD RELAY 10 board ...
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Страница 126: ... 117 VI Refrigerant Circuit 1 Refrigerant Circuit Figure 119 2 Principal Parts and Functions 126 ...
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Страница 134: ... 125 VI Refrigerant Circuit 3 CMB P104 and P108NU GB sub TH25 TH22 LEV3a CP Solenoid valves Block Check valves Block ...
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Страница 366: ... 357 IX Troubleshooting ...
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Страница 368: ... 359 X LED monitor display on the outdoor unit board 1 How to read the LED on the service monitor 361 ...
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