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[ VI Refrigerant Circuit ]
- 90 -
HWE09120 GB
Linear
expan-
sion
valve
LEV1
(SC control)
Adjusts the amount of bypass flow
from the liquid pipe on the outdoor
unit during cooling
DC12V
Opening of a valve driven by a
stepping motor 0-480 pulses
(direct driven type)
Same as in-
door LEV
The resistance
value differs
from that of the
indoor LEV.
(Refer to the
section "LEV
Troubleshooti
ng.")(page 24
5)
LEV2
(Refrigerant
flow adjust-
ment)
Adjusts refrigerant flow during
heating
DC12V
Opening of a valve driven by a
stepping motor 2100 pulses
(Max. 3000 pulses)
Same as in-
door LEV
Heater CH11 Heats the refrigerant in the com-
pressor
Belt heater
P72 model
1511 ohm 35W (AC230V)
P96, P120, and P144 models
1280 ohm 45W (AC240V)
Resistance
check
4-way
valve
21S4a Changeover between heating and
cooling
AC208-230V
Dead: cooling cycle
Live: heating cycle
Continuity
check with a
tester
21S4b 1) Changeover between heating
and cooling
2) Controls outdoor unit heat ex-
changer capacity
AC208-230V
Dead: cooling cycle
Outdoor unit heat exchanger
capacity at 100%
Live: heating cycle
Outdoor unit heat exchanger
capacity at 50%
or heating cycle
21S4c P120,
P144
moels
only
Fan mo-
tor
FAN motor 1,2 FAN
motor 2
is only
on the
P120
and
P144
mod-
els.
Regulates the heat exchanger ca-
pacity by adjusting the operating
frequency and operating the pro-
peller fan based on the operating
pressure.
(TJMU)
AC180V, 50.5Hz, 920W
(YJMU)
AC414V, 50.5Hz, 920W
Part
name
Symbols
(functions)
Notes Usage Specifications Check method