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Check
SiUS281811EA
304
Part 6 Service Diagnosis
5.11 Pressure Sensor Check
CHECK 12
Voltage Measurement Point of the High Pressure Sensor
Voltage Measurement Point of the Low Pressure Sensor
High Pressure (P
H
)
Low Pressure (P
L
)
Output Voltage V
H
, V
L
Detected Pressure
40.8
35.7
30.6
25.5
20.4
15.3
10.2
5.1
–5.1
–72.5
0
45.9
51.0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–0.5
–0.5
0
0.5
1
1.5
2
2.5
3
3.5
4
(VDC)
(kg/cm
2
)
(psi)
(MPa)
P
H
, P
L
P
H
(MPa) = × V
H
– × 0.5
P
L
(MPa) = × V
L
– × 0.5
P
H
: High pressure (MPa)
P
L
: Low pressure (MPa)
V
H
: Output Voltage (High Side) (VDC)
V
L
: Output Voltage (Low Side) (VDC)
4.15
3.0
4.15
3.0
1.7
3.0
1.7
3.0
1 MPa = 145 psi
725
653
580
508
435
363
290
218
145
72.5
0
+5 V
(4)
(3)
(2)
(1)
Red
Black
White
X17A
(red)
High
pressure
sensor
Microcomputer
A/D input
Measure DC voltage between these wires.
Main PCB (A1P)
+5 V
(4)
(3)
(2)
(1)
Microcomputer
A/D input
Measure DC voltage between these wires.
X18A
(blue)
Red
Black
White
Low
pressure
sensor
Main PCB (A1P)
Summary of Contents for SkyAir RZR-TA Series
Page 1: ...Service Manual Cooling Only 60 Hz Heat Pump 60 Hz RZR TA RZQ TA Series SiUS281811EA...
Page 202: ...SiUS281811EA 196 Part 6 Service Diagnosis 5 15 Fan Motor Connector Check for FTQ TA 311...
Page 323: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 317 RZR18 24TAVJUA RZQ18 24TAVJUA 3D124495...
Page 327: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 321 FHQ18 24 30PVJU FHQ36 42MVJU 3D048116C...
Page 328: ...Wiring Diagrams SiUS281811EA 322 Part 7 Appendix FAQ18 24TAVJU 3D114844B...
Page 329: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 323 FBQ18 24 30 36 42 48PVJU 3D065984J...