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[ VI Refrigerant Circuit ]
- 83 -
HWE08040 GB
Ther-
mistor
TH4
(Discharge)
1) Detects discharge air temper-
ature
2) Provides high-pressure pro-
tection
Degrees Celsius Resistance
check
0°C[32°F] :698kohm
10°C[50°F] :413kohm
20°C[68°F] :250kohm
30°C[86°F] :160kohm
40°C[104°F] :104kohm
50°C[122°F] : 70kohm
60°C[140°F] : 48kohm
70°C[158°F] : 34kohm
80°C[176°F] : 24kohm
90°C[194°F] :17.5kohm
100°C[212°F] :13.0kohm
110°C[230°F] : 9.8kohm
TH2 LEV 1 is controlled based on the
TH2, TH3, and TH6 values.
Degrees Celsius
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
TH3
(Pipe
temperature)
1) Controls frequency
2) Controls defrosting during
heating operation
3) Detects subcool at the heat
exchanger outlet and controls
LEV1 based on HPS data
and TH3 data
TH7
(Outdoor tem-
perature)
1) Detects outdoor air tempera-
ture
2) Controls fan operation
TH5 LEV2a and LEV2b are controlled
based on the 63LS and TH5 val-
ues.
TH6 Controls LEV1 based on TH2,
TH3, and TH6 data.
THHS
Inverter
heat sink tem-
perature
Controls inverter cooling fan
based on THHS temperature
Degrees Celsius
0°C[32°F] :161kohm
10°C[50°F] :97kohm
20°C[68°F] :60kohm
25°C[77°F] :48kohm
30°C[86°F] :39kohm
40°C[104°F] :25kohm
THBOX
Control box in-
ternal tempera-
ture detection
Sole-
noid
valve
SV1a
Discharge-suc-
tion
bypass
1) High/low pressure bypass at
start-up and stopping, and
capacity control during low-
load operation
2) High-pressure-rise preven-
tion
AC208-230V
Open while being powered/
closed while not being pow-
ered
Continuity
check with a
tester
SV5b
Heat
exchanger
capacity control
Controls outdoor unit heat ex-
changer capacity
SV5c P120
model
only
SV9 High-pressure-rise prevention Open while being powered/
closed while not being pow-
ered
Part
name
Symbols
(functions)
Notes Usage Specifications Check method
R = 7.465k
120
R = 4057
R =
7.465
25/120
t
4057
273 t
1
393
1
exp
R = 15k
0
R = 3460
R = 15
0/80
t
3460
273 t
1
273
1
exp
R = 17k
50
R = 4016
R = 17
25/120
t
4016
273 t
1
323
1
exp