Daikin Altherma HT Service Manual

ESIE09-08B
Troubleshooting 117
Part 7 - Troubleshooting
1. Symptom-based Troubleshooting .......................................................119
2. Troubleshooting by Remote Control ...................................................121
2.1 The INSPECTION / TEST Button.........................................................121
2.2 Self-diagnosis by Wired Remote Control .............................................122
2.3 Operation of the Remote Controller’s Inspection / Test Opera
tion 
Button ...................................................................................................123
2.4 Remote Control Service Mode ..................
...........................................124
2.5 Remote Controller Self-Diagnosis Function ...................
......................126
3. Troubleshooting by Indication on the Remote Controller ....................132
3.1 “A1” Indoor Unit: PC Board Defect ........................................................132
3.2 “A6” Indoor Unit: Pump Error (M1P) or Other Water System Error ......133
3.3 “A9” Indoor Unit: Malfunction of Moving Part of Electronic Expansion 
Va
lve (K1E) R-410A circuit...................................................................134
3.4 “AE” Indoor Unit: Water Circuit Error.....................................................136
3.5 “AJ” Indoor Unit: Malfunction of Capacity Determination Device..........137
3.6 “C1” Indoor Unit: Failure of Transmission (Between Indo
or unit 
PC Board and Control PC Board) ........................................................138
3.7 “C4” Indoor Unit: Malfunction of Thermistor (R3T) Liquid Thermistor 
R-410A .................................................................................................140
3.8 “C5” Indoor Unit: Malfunction of Tank Thermistor (R2T).......................141
3.9 “C9” Indoor Unit: Return Water Thermistor (R4T).................................142
3.10 “CA” Indoor Unit: Leaving Water Thermistor Error (R5T)......................143
3.11 “CJ” Indoor Unit: Malfunction of Thermostat Sensor in Remote 
Controller..............................................................................................144
3.12 “E1” Outdoor Unit: PC Board Defect......................................................145
3.13 “E1” Indoor Unit: PC Board Defect.........................................................146
3.14 “E3” Outdoor Unit: Actuation of High Pressure Switch..........................147
3.15 “E3” Indoor Unit: Actuation of High Pressure Switch ............................149
3.16 “E4” Outdoor Unit: Actuation of Low Pressure Sensor .........................152
3.17 “E4” Indoor Unit: Actuation of Low Pressure Sensor ............................154
3.18 “E5” Outdoor Unit: Inverter Compressor Motor Lock ............................156
3.19 “E5” Indoor Unit: Inverter Compressor Motor Lock ...............................157
3.20 “E7” Malfunction of Outdoor Unit Fan Motor .........................................158
3.21 “E9” Outdoor Unit: Malfunction of Moving Part of Electronic 
Expansion Valve...................................................................................160
3.22 “E9” Indoor Unit: Malfunction of Moving Part of Electronic Expansion

Valve (K2E) R-134a circuit ...................................................................162
3.23 “F3” Outdoor Unit: Abnormal Discharge Pipe Temperature..................164
3.24 “F3” Indoor Unit: Abnormal Discharge Pipe Temperature ....................165
3.25 “H9” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air ....166
3.26 “J3” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R2T)....167
3.27 “J3” Indoor Unit: Malfunction of Discharge Pipe Thermistor (R6T) ......168
3.28 “J5” Outdoor Unit: Malfunction of Thermistor (R3T, R5T) for Suction
Pipe
1, 2...............................................................................................169
3.29 “J5” Indoor
Unit: Malfunction of Thermistor (R7T) for Liquid R-134a ...170
3.30 “J6” Outdoor Unit: Malfunction of Thermistor (R6T) for Outdoor Unit 
Heat Exchanger....................................................................................171

Daikin Altherma HT Specifications

General

Type	Air-to-water heat pump
Refrigerant	R-410A
Water Outlet Temperature	Up to 80°C
Operating Temperature Range	-20°C to 35°C
Power Supply	3-phase, 400V
Energy Efficiency Class (Heating)	A++