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Mitsubishi Electric PFAV-P250VM-E Service Manual page 89

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Table of Contents
[ VII Refrigerant Circuit ]
Part
Symbols
name
(functions)
Linear
LEV1
expan-
(SC control)
sion
valve
LEV2
(Refrigerant
flow adjust-
ment)
Heater
CH11
4-way
21S4a
valve
21S4b
21S4c
FAN
FAN motor
motor
HWE10190
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
P250 -
1) Changeover between heating
P400
and cooling
models
2) Controls outdoor unit heat ex-
changer capacity
P350
and
P400
models
Regulates the heat exchanger ca-
pacity by adjusting the operating
frequency and operating the pro-
peller fan, based on the operating
pressure
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
2100 pulses
(Max. 3000 pulses)
Cord heater AC240V
P250 model
1511 Ω 35W
P350, 400 models
1176 Ω 45W
AC220-240V
Dead: cooling cycle
Live: heating cycle
AC220-240V
Dead: cooling cycle
Outdoor unit heat exchanger
capacity at 100%
Live: heating cycle
Outdoor unit heat exchanger
capacity at 50%
or heating cycle
AC342V, 50.5Hz, 920W
- 80 -
Specifications
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 196
))
Same as in-
door LEV
Resistance
check
Continuity
check with a
tester
GB
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