Filter
Top Products
[ VI Refrigerant Circuit ]
- 117 -
HWE0803A GB
Thermis-
tor
TH3
(Pipe
temperature)
Controls defrosting during heating
operation
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
TH7
(Outdoor tem-
perature)
1) Detects outdoor air tempera-
ture
2) Controls fan operation
TH5 Fan operated on the 63LS and
TH5 values.
TH6 Controls defrosting during heating
operation
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
SV2
SV4a - SV4d
Heat
exchanger
capacity control
Controls outdoor unit heat ex-
changer capacity
SV5b
Heat
exchanger
capacity control
Prevents high-pressure-rise
Controls defrost cycle
AC208 - 230V
Closed while being powered/
open while not being powered
SV5c Allows the refrigerant to pass
through the bypass pipe to pre-
vent an accumulation of liquid re-
frigerant
AC208 - 230V
Open while being powered/
closed while not being pow-
ered
SV9 High-pressure-rise prevention AC208 - 230V
Open while being powered/
closed while not being pow-
ered
Heater CH11 Heats the refrigerant in the com-
pressor
Cord heater
P72 model
1035 ohm 51W
P96, P120 models
928 ohm 57W
Resistance
check
4-way
valve
21S4a Changeover between heating and
cooling
AC208-230V
Dead: cooling cycle
Live: heating cycle
Continuity
check with a
tester
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