Troubleshooting by Indication on the Remote Controller
ESIE09-08A
152
Troubleshooting
3.9
“C9”
Indoor Unit: Return Water Thermistor (R4T)
Remote Control
Display
C9
Subcode 0
Applicable Models
AII indoor unit models
Method of
Malfunction
Detection
Malfunction detection is carried out by temperature detected by return water temperature thermistor.
Malfunction
Decision Conditions
When the return water temperature thermistor becomes disconnected or shorted while the unit is running.
Supposed Causes
Defect of indoor unit thermistor (R4T) for water return
Defect of indoor unit PC board (A1P)
Troubleshooting
Refer to thermistor resistance / temperature characteristics table on P251.
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Replace the indoor unit PC board (A1P).
Connect the thermistor and turn
on again.
Faulty thermistor
value > 95 C
NO
NO
Replace the thermistor (R4T).
YES
YES
Connector is
connected to X12A of
the indoor unit PC
board.
Resistance
is normal when
measured after
disconnecting the thermistor
(X12A) (R4T) from the
indoor unit PC board.
(7.2k ~112k )
(V2786)
Bad wire connection
value < -43.6 C
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...