Troubleshooting by Indication on the Remote Controller
ESIE09-08A
186
Troubleshooting
3.35
“JC”
Outdoor Unit: Malfunction of Low Pressure Sensor
Remote Control
Display
JC
Applicable Models
ER*Q 011~016*
Method of
Malfunction
Detection
Malfunction is detected from pressure detected by low pressure sensor.
Malfunction
Decision Conditions
When the low pressure sensor is short circuit or open circuit.
Supposed Causes
Defect of low pressure sensor
Connection of high pressure sensor with wrong connection
Defect of outdoor unit PC board
Troubleshooting
1: Voltage measurement point
2: Refer to “Pressure Sensor”, pressure/voltage characteristics table on P254.
(V2808)
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Replace the low pressure sensor.
Connect low pressure sensor
property and restart system.
NO
NO
Replace outdoor unit PC board
(A1P).
YES
YES
The low
pressure sensor is
connected to X18A (blue) of
outdoor unit PC board
(A1P).
4
3
2
1
(V2809)
Red
Black
White
GND
*2 Measure voltage here.
Lo
w pressure sensor
Outside unit PC board A1P
+5V
X18A
Microcomputer
A/D input
Summary of Contents for ALTHERMA HT EKBUHAA6 V3
Page 2: ......
Page 7: ...ESIE09 08A Table of Contents v 1 3 Service Tools 283 Index i Drawings Flow Charts iii ...
Page 16: ...Model Names of Indoor Outdoor Units Tanks ESIE09 08A 4 General Information ...
Page 28: ...Refrigerant Circuit ESIE09 08A 16 Refrigerant Circuit EKHBRD 011 014 016 AB AC V1 Y1 ...
Page 40: ...Functional Parts Layout ESIE09 08A 28 Refrigerant Circuit ...
Page 63: ...ESIE09 08A PCB Layout for EKHBRD 011 014 016 AA AB AC V1 Y1 Refrigerant Circuit 51 ...
Page 64: ...PCB Layout for EKHBRD 011 014 016 AA AB AC V1 Y1 ESIE09 08A 52 Refrigerant Circuit ...
Page 125: ...ESIE09 08A Field Setting Test Operation 113 ...
Page 232: ...Troubleshooting by Indication on the Remote Controller ESIE09 08A 222 Troubleshooting ...
Page 237: ...ESIE09 08A Piping Diagrams Appendix 227 EKHBRD 011 014 016 AB AC V1 Y1 ...
Page 250: ...Wiring Diagrams ESIE09 08A 240 Appendix EKHBRD 011 014 016 AB AC V1 ...
Page 251: ...ESIE09 08A Wiring Diagrams Appendix 241 ...
Page 256: ...Wiring Diagrams ESIE09 08A 246 Appendix EKHBRD 011 014 016 AB AC Y1 ...
Page 257: ...ESIE09 08A Wiring Diagrams Appendix 247 ...
Page 260: ...Wiring Diagrams ESIE09 08A 250 Appendix ...