[
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
Содержание PQHY-P120THMU-A
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Страница 102: ... III Heat source Unit Components 93 HWE09080 GB 2 RELAY BOARD RELAY 4 board 3 RELAY BOARD RELAY 10 board ...
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Страница 113: ... 104 IV Remote Controller GB HWE09080 ...
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Страница 130: ... 121 HWE09080 GB VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 123 2 Principal Parts and Functions 126 ...
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Страница 366: ... 357 HWE09080 GB X LED Monitor Display on the Heat source Unit Board 1 How to Read the LED on the Service Monitor 359 ...
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