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ESIE09-08A
Troubleshooting by Indication on the Remote Controller
Troubleshooting
187
3.36
“JC”
Indoor Unit: Malfunction of Low Pressure Sensor
Remote Control
Display
JC
Subcode 16
Applicable Models
All indoor units
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 indoor unit PC board (A4P)
Troubleshooting
1: Voltage measurement point
2: Refer to “Pressure Sensor”, pressure/voltage characteristics table on P254.
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
The
relationship
between the *1VL
and low pressure is
normal (see *2) when voltage is
measured between X18A pins
(2) and (3) indoor unit
PC board (A4P)
(see *1).
Replace the low pressure sensor.
Connect low pressure sensor
property and restart system.
Bad wire connection
value < 0.1 bar
instantly
Faulty sensor
value < 18 bar
over 12 minutes
NO
NO
Replace indoor unit PC board
(A4P).
YES
YES
The low
pressure sensor is
connected to X18A (blue) of
indoor unit PC board
(A4P).
4
3
2
1
(V2809)
Red
Black
White
GND
*2 Measure voltage here.
Lo
w p
ressu
re
sensor
Indoor unit PC boa
rd A4P
+5V
X18A
Microcomputer
A/D input
Summary of Contents for ALTHERMA HT ERSQ 011 AA
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...