Mitsubishi Electric City Multi PUHY-P500YSHM-A Service Handbook page 71

[ VII Refrigerant Circuit ]
Part Symbols
name (functions)
Linear LEV1
expan- (SC control)
sion
valve
LEV2a
LEV2b
(Refrigerant
flow adjust-
ment)
Heater CH11
4-way 21S4a
valve
21S4b
HWE07150
Notes Usage
Adjusts the amount of bypass flow
from the liquid pipe on the outdoor
unit during cooling
Adjusts refrigerant flow during
heating
Heats the refrigerant in the com-
pressor
Changeover between heating and
cooling
1) Changeover between heating
and cooling
2) Controls outdoor unit heat ex-
changer capacity
- 62 -
Specifications
DC12V
Opening of a valve driven by a
stepping motor 0-480 pulses
(direct driven type)
DC12V
Opening of a valve driven by a
stepping motor 1400 pulses
Cord heater AC230V
1511 ohm 35W
AC208-230V
Dead: cooling cycle
Live: heating cycle
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
Check method
Same as in-
door LEV
The resistance
value differs
from that of the
indoor LEV.
(Refer to the
section "LEV
Troubleshooti
ng."(page 166
))
Same as in-
door LEV
Resistance
check
Continuity
check with a
tester
GB