Mitsubishi Electric PURY-EP200YLM-A, Service Handbook, Page: 100 / 434

[3-7 Functions of the Major Components of BC Controller ]
- 89 -
HWE1314A GB
3
Major
Compo
nent
s,
The
ir
Fu
nct
io
ns
and
Ref
riger
ant
Circ
uit
s
(2) GA1 type
Part name
Symbols
(functions)
Part
code
Usage Specifications Check method
Pressure
sensor
PS1
(High pres-
sure side)
1) Detects high pressure
2) LEV control
PS3
(Intermedi-
ate pres-
sure)
1) Detects intermediate
pressure
2) LEV control
Thermistor TH11
(Liquid inlet
tempera-
ture)
LEV control
(Liquid level control)
0°C[32°F] : 15 kΩ
10°C[50°F] :9.7 kΩ
20°C[68°F] :6.4 kΩ
25°C[77°F] :5.3 kΩ
30°C[86°F] :4.3 kΩ
40°C[104°F] :3.1 kΩ
TH12
(Bypass
outlet tem-
perature)
LEV control (Superheat)
TH15
(Bypass in-
let tempera-
ture)
LEV control (Superheat)
TH16
(Liquid re-
frigerant
tempera-
ture)
LEV control (Subcool)
Solenoid
valve
SVM1 Opens during cooling and de-
frost modes
AC220-240V
Open while being powered/
closed while not being pow-
ered
Continuity
check with a
tester
SVM2 Pressure differential control
SVA Provides refrigerant to indoor
unit in cooling operation
SVB Provides refrigerant to indoor
unit in heating operation
SVC Provides refrigerant to indoor
unit in cooling operation
LEV LEV1 1) Liquid level control
2) Pressure differential con-
trol
3) Subcool control
DC12V
Opening of a valve driven by a
stepping motor
41 - 3000 pulses
Same as
indoor LEV
LEV3 DC12V
Opening of a valve driven by a
stepping motor
0 - 2000 pulses
Pressure
0~4.15 MPa [601psi]
Vout 0.5~3.5V
0.071V/0.098 MPa [14psi]
Pressure [MPa]
=1.38 x Vout [V]-0.69
Pressure [psi]
=(1.38 x Vout [V] - 0.69) x 145
GND (Black)
Vout (White)
Vcc (DC5V) (Red)
Con-
nector
PS1
1
1 2 3
2
3
R = 15k
0
R = 3460
R = 15
0/80
t
3460 273 t
1
273
1
exp