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[ VI Refrigerant Circuit ]
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HWE09080 GB
Heater CH11 Heats the refrigerant in the com-
pressor
Cord heater
1035 ohm 51W
Resistance
check
4-way
valve
21S4a Changeover between heating and
cooling
AC208-230V
Dead: cooling cycle
Live: heating cycle
Continuity
check with a
tester
Elec-
tronic
expan-
sion
valve
LEV1
(for SC control)
PQHY
only
Regulates the amount of bypass
flow from the heat source unit liq-
uid pipe during cooling
12 VDC
Stepping motor driven valve
opening
0-480 pulses (direct driven)
Same as with
the indoor
LEV.
The resistance
values differs
from that of the
LEVs on in-
door unit.
(Refer to the
section on
Troubleshoot-
ing the
LEV(page 310
))
LEV2a
LEV2b
(Refrigerant
flow control
PQHY
only
Controls the refrigerant flow dur-
ing heating
12 VDC
Stepping motor driven valve
opening
1400 pulses
Same as with
the indoor
LEV.
Part
name
Symbols
(functions)
Notes Usage Specifications Check method