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[ VI Refrigerant Circuit ]
- 84 -
HWE08040 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 238
))
LEV2a
LEV2b
(Refrigerant
flow adjust-
ment)
Adjusts refrigerant flow during
heating
DC12V
Opening of a valve driven by a
stepping motor 1400 pulses
Same as in-
door LEV
Heater CH11 Heats the refrigerant in the com-
pressor
Cord heater AC230V
P72 and P96 models
1037 ohm 51W
P120 model
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
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
model
only
Part
name
Symbols
(functions)
Notes Usage Specifications Check method