Daikin Altherma HT Service Manual

ESIE09-08B
Index i
Index
A
A1 .........................................................................132
A6 .........................................................................133
A9 .........................................................................134
Abnormal Discharge Pipe Temperature .......164, 165
About Refrigerant R-410A ....................................267
Actuation of High Pressure Switch ...............147, 149
Actuation of Low Pressure Sensor ...............152, 154
AE ........................................................................136
AJ .........................................................................137
Applicable range of Field setting ............................84
C
C1 .........................................................................138
C4 .........................................................................140
C5 .........................................................................141
C9 .........................................................................142
CA ........................................................................143
Check for causes of drop in low pressure ............210
Check for causes of rise in high pressure ............209
Check Operation ....................................................76
CJ .........................................................................144
Compressor PI Control ...........................................48
Converter error .....................................................190
D
Defrosting Operation ..............................................51
Detailed Explanation of Setting Modes ..................84
E
E1 .................................................................145, 146
E3 .................................................................147, 149
E4 .................................................................152, 154
E5 .................................................................156, 157
E7 .........................................................................158
E9 .................................................................160, 162
Electronic Expansion Valve PI Control ...................49
Excessive Number of Indoor Units .......................206
External Backup Heater Control ...........................251
F
F3 .................................................................164, 165
Failure of Transmission (Between Indoor unit PC
Board and Control PC Board) .......................138
Faulty combination of PCB ...................................193
Field Setting ...........................................................79
Field Setting from Outdoor Unit ............................106
Field Setting from Remote Control .........................79
Freeze Prevention ..................................................62
Functional Parts Layout .........................................11
G
General Symptoms ..............................................254
H
H9 ........................................................................ 166
Heating Operation Prohibition ............................... 61
High Pressure Protection Control .......................... 54
High Voltage of Capacitor in Ma
in In
verter 
Circuit ................................................... 191, 192
I
Inverter Compressor Abnormal ................... 182, 183
Inverter Compressor Motor Lock ................. 156, 157
Inverter Current Abnormal ........................... 184, 185
Inverter Protection Control .................................... 59
Inverter Start up Error ................................. 186, 187
J
J3 ................................................................ 167, 168
J5 ................................................................ 169, 170
J6 ........................................................................ 171
J7 ........................................................................ 172
J9 ........................................................................ 173
JA ................................................................ 174, 175
JC ................................................................ 176, 177
L
L1 ................................................................ 178, 179
L4 ................................................................ 180, 181
L5 ................................................................ 182, 183
L8 ................................................................ 184, 185
L9 ................................................................ 186, 187
LC ................................................................ 188, 189
Leaving Water Thermistor Error R5T .................. 143
LH ........................................................................ 190
Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure .............. 194
M
Main Components ............................................... 247
Malfunction .......................................................... 170
Malfunction code indication by outdoor unit 
PC board ...................................................... 128
Malfunction of Capacity Determination Device .... 137
Malfunction of Discharge Pipe Thermistor 
(R2T) .................................................... 167, 168
Malfunction of High Pressure Sensor .......... 174, 175
Malfunction of Inverter Radiating Fin Temperature
Rise ...................................................... 180, 181
Malfunction of Low Pressure Sensor .......... 176, 177
Malfunction of Moving Part of Electronic Expansion
Valve (K1E) .................................................. 134
Malfunction of Moving Part of Electronic Expansion
Valve (Y1E, Y3E) ................................. 160, 162
Malfunction of Outdoor Unit Fan Motor ............... 158
Malfunction of PC Board ............................. 178, 179

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++