Mitsubishi Electric HP120TNU-A Service Handbook page 93

[3-7 Functions of the Major Components of BC Controller ]
(4) KB type
Symbols
Part name
(functions)
Pressure PS3
sensor (Intermedi-
ate pres-
sure)
Thermistor TH12
(Bypass
outlet tem-
perature)
TH15
(Bypass in-
let tempera-
ture)
TH16
(Liquid re-
frigerant
tempera-
ture)
Solenoid SVA
valve
SVB
SVC
LEV LEV3
16
- chapter 3
Part
Usage
code
1) Detects intermediate
pressure
2) LEV control
LEV control (Superheat)
LEV control (Superheat)
LEV control (Subcool)
Provides refrigerant to indoor
unit in cooling operation
Provides refrigerant to indoor
unit in heating operation
Provides refrigerant to indoor
unit in cooling operation
Pressure differential control
Specifications
Pressure
PS1
0~4.15 MPa [601psi]
Vout 0.5~3.5V
1 2 3
0.071V/0.098 MPa [14psi]
Pressure [MPa]
Con-
=1.38 x Vout [V]-0.69
nector
Pressure [psi]
=(1.38 x Vout [V] - 0.69) x 145
GND (Black)
1
2
Vout (White)
3
Vcc (DC5V) (Red)
R = 15k
0
R = 3460
0/80
1 1
R = 15 exp
3460
t
273
0°C[32°F] : 15 k
10°C[50°F] :9.7 k
20°C[68°F] :6.4 k
25°C[77°F] :5.3 k
30°C[86°F] :4.3 k
40°C[104°F] :3.1 k
AC208-230V
Open while being powered/
closed while not being pow-
ered
DC12V
Opening of a valve driven by a
stepping motor
0-2000 pulses
Check method
Continuity
check with a
tester
Same as
indoor LEV
HWE18220_GB