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[ VI Refrigerant Circuit ]
- 127 -
HWE09080 GB
Thermis-
tor
TH2 PQHY
only
LEV1 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)
PQHY
only
Controls defrosting during heating
operation
1) Frequency control
2) LEV1 is controlled according
to the amount of subcool at
the heat exchanger outlet,
which is calculated based on
the HPS data and TH3 value.
TH7
(Water inlet
temperature)
1) Detects water inlet tempera-
ture
2) Protects water heat exchang-
er from high and low temper-
atures
3) Controls water heat exchang-
er
TH8
(Water outlet
temperature)
1) Detects water inlet tempera-
ture
2) Protects water heat exchang-
er from freezing up
TH5 Water heat exchanger is con-
trolled based on the 63LS and
TH5 values.
TH6 PQHY
only
LEV1 is controlled based on the
TH2, TH3, and TH6 values
THINV Determines the LEV that controls
refrigerant flow on the component
cooler
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
SV4a - SV4d
Heat
exchanger
capacity control
Controls heat source unit heat ex-
changer capacity
SV7a,7b
Heat
exchanger
capacity control
Controls heat source unit heat ex-
changer capacity
AC208 - 230V
Closed while being powered/
open while not being powered
SV9 High-pressure-rise prevention AC208 - 230V
Open while being powered/
closed while not being pow-
ered
Part
name
Symbols
(functions)
Notes Usage Specifications Check method
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