Daikin REYQ72-456XATJU User manual

Service
Manual
Heat Recovery 60 Hz
REYQ72- 456XATJU (A)
REYQ72-456XAYDU(A)
REYQ72-432XAYCU(A)
SiUS371901EB

SiUS371901EB
iTable of Contents
Introduction ....................................................................................... 1
1. Safety Cautions...........................................................................................2
1.1 Warnings and Cautions Regarding Safety of Workers................................. 2
1.2 Warnings and Cautions Regarding Safety of Users..................................... 4
2. Icons Used ..................................................................................................7
3. Revision History ..........................................................................................8
Part 1 General Information ............................................................... 9
1. Model Names ............................................................................................10
1.1 Indoor Unit.................................................................................................. 10
1.2 Outdoor Unit ............................................................................................... 11
1.3 Air Treatment Equipment ........................................................................... 12
1.4 Branch Selector Unit .................................................................................. 12
2. External Appearance.................................................................................13
2.1 Indoor Unit.................................................................................................. 13
2.2 Outdoor Unit ............................................................................................... 14
2.3 Air Treatment Equipment ........................................................................... 15
2.4 Branch Selector Unit .................................................................................. 15
3. Combination of Outdoor Units...................................................................16
3.1 REYQ-XATJU(A), REYQ-XAYDU(A), REYQ-XAYCU(A)........................... 16
4. Capacity Range.........................................................................................17
4.1 Combination Ratio...................................................................................... 17
4.2 Outdoor Unit Combinations ........................................................................ 18
4.3 Limitation of Capacity Index for Heat Recovery ......................................... 19
5. Specifications ............................................................................................20
5.1 REYQ-XATJU(A)........................................................................................ 20
5.2 REYQ-XAYDU(A)....................................................................................... 37
5.3 REYQ-XAYCU(A)....................................................................................... 54
Part 2 Refrigerant Circuit................................................................ 70
1. Refrigerant Circuit (Piping Diagrams) .......................................................71
1.1 Outdoor Unit ............................................................................................... 71
1.2 Indoor Unit.................................................................................................. 75
1.3 Outdoor-Air Processing Unit....................................................................... 77
1.4 Branch Selector Unit .................................................................................. 78
2. Functional Parts Layout ............................................................................87
2.1 REYQ72/96/120XATJU(A), REYQ72/96/120XAYDU(A),
REYQ72/96/120XAYCU(A) ........................................................................ 87
2.2 REYQ144/168XATJU(A), REYQ144/168XAYDU(A),
REYQ144/168XAYCU(A) ........................................................................... 89
3. Refrigerant Flow for Each Operation Mode...............................................91
3.1 Cooling Operation ...................................................................................... 91
3.2 Heating Operation ...................................................................................... 92
3.3 Simultaneous Cooling and Heating Operation ........................................... 93
3.4 Cooling Oil Return Operation ..................................................................... 94
3.5 Defrost Heating Oil Return Operation ........................................................ 95

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Table of Contents ii
3.6 Oil Return Operation at Simultaneous Cooling and Heating Operation ..... 96
Part 3 Remote Controller ................................................................ 97
1. Applicable Models .....................................................................................98
2. Names and Functions ...............................................................................99
2.1 BRC1E73 ................................................................................................... 99
2.2 BRC1H71W.............................................................................................. 102
2.3 Wireless Remote Controller ..................................................................... 110
3. Main/Sub Setting.....................................................................................111
3.1 BRC1E73 ................................................................................................. 111
3.2 BRC1H71W.............................................................................................. 113
3.3 When Wireless Remote Controller is Used Together............................... 115
4. Address Setting for Wireless Remote Controller.....................................116
5. Centralized Control Group No. Setting....................................................118
5.1 BRC1E73 ................................................................................................. 118
5.2 BRC1H71W.............................................................................................. 120
5.3 Wireless Remote Controller ..................................................................... 120
5.4 Group No. Setting Example...................................................................... 121
6. Service Settings Menu, Maintenance Menu............................................122
6.1 BRC1E73 ................................................................................................. 122
7. Administrator Menu, Installer Menu ........................................................126
7.1 BRC1H71W.............................................................................................. 126
Part 4 Functions and Control ........................................................ 127
1. Operation Flowchart................................................................................129
1.1 Outdoor Unit ............................................................................................. 129
1.2 Branch Selector Unit & Indoor Unit Operation Mode Detail ..................... 130
2. Stop Control ............................................................................................131
2.1 Stop due to Error ...................................................................................... 131
2.2 When System is in Stop Mode ................................................................. 131
2.3 Slave Unit Stops during Master Unit Operation........................................ 131
3. Standby Control ......................................................................................132
3.1 Restart Standby........................................................................................ 132
3.2 Crankcase Heater Control........................................................................ 132
4. Startup Control ........................................................................................133
4.1 Startup Control in Cooling ........................................................................ 133
4.2 Startup Control in Heating ........................................................................ 134
5. Basic Control...........................................................................................135
5.1 Normal Control ......................................................................................... 135
5.2 Compressor PI Control............................................................................. 136
5.3 Compressor Step Control......................................................................... 137
5.4 Electronic Expansion Valve PI Control..................................................... 139
5.5 Step Control of Outdoor Fans .................................................................. 140
5.6 Heat Exchanger Control ........................................................................... 141
6. Protection Control ...................................................................................142
6.1 High Pressure Protection Control............................................................. 142

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6.2 Low Pressure Protection Control.............................................................. 144
6.3 Discharge Pipe Protection Control ........................................................... 145
6.4 Compressor Body Protection Control....................................................... 146
6.5 Inverter Protection Control ....................................................................... 146
7. Special Control........................................................................................148
7.1 Pump Down Residual Operation .............................................................. 148
7.2 Oil Return Operation ................................................................................ 149
7.3 Defrost Operation ..................................................................................... 152
7.4 Outdoor Unit Rotation............................................................................... 153
7.5 Cooling/Heating Mode Switching ............................................................. 154
8. Other Control...........................................................................................157
8.1 Backup Operation..................................................................................... 157
8.2 Demand Operation ................................................................................... 157
8.3 Heating Operation Prohibition .................................................................. 157
9. Outline of Control (Indoor Unit) ...............................................................159
9.1 Operation Flowchart ................................................................................. 159
9.2 Set Temperature and Control Target Temperature.................................. 163
9.3 Remote Controller Thermistor .................................................................. 165
9.4 Thermostat Control................................................................................... 167
9.5 Drain Pump Control.................................................................................. 170
9.6 Control of Electronic Expansion Valve ..................................................... 172
9.7 Freeze-Up Prevention Control.................................................................. 173
9.8 List of Swing Flap Operations .................................................................. 175
9.9 Hot Start Control (In Heating Operation Only).......................................... 176
9.10 Louver Control for Preventing Ceiling Dirt................................................ 177
9.11 Heater Control (Except FXTQ-TA Models)............................................... 178
9.12 Heater Control (FXTQ-TA Models)........................................................... 179
9.13 Gas Furnace Control (CXTQ-TA Models) ................................................ 182
9.14 3-Step Thermostat Processing (FXTQ-TA Models) ................................. 183
9.15 Fan Control (Heater Residual) (FXTQ-TA Models) .................................. 184
9.16 Interlocked with External Equipment (FXTQ-TA and CXTQ-TA Models). 184
Part 5 Field Settings and Test Operation ..................................... 186
1. Field Settings for Indoor Unit...................................................................187
1.1 Field Settings with Remote Controller ...................................................... 187
1.2 List of Field Settings for Indoor Unit ......................................................... 194
1.3 Applicable Field Settings .......................................................................... 196
1.4 Details of Field Settings for Indoor Unit.................................................... 200
1.5 Gas Furnace Set Up................................................................................. 217
1.6 List of Field Settings for Outdoor-Air Processing Unit .............................. 219
1.7 Setting of Operation Control Mode........................................................... 219
2. Field Setting from Outdoor Unit...............................................................221
2.1 DIP Switch Setting when Mounting a Spare PCB .................................... 222
2.2 Accessing the BS Buttons on the PCB..................................................... 224
2.3 Operating the BS Buttons and DIP Switches on the PCB........................ 225
2.4 Connecting the PC Configurator to the Outdoor Unit............................... 228
2.5 Monitoring Function and Field Settings .................................................... 229
2.6 Cool/Heat Mode Changeover................................................................... 252

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2.7 Night-Time Low Noise Operation and Demand Operation....................... 253
3. Field Settings for Branch Selector Unit ...................................................258
3.1 Field Settings for Single Branch Selector Unit ......................................... 258
3.2 Field Settings for Multi Branch Selector Unit (Standard Series)............... 259
3.3 Field Settings for Multi Branch Selector Unit (Flex Series) ...................... 260
3.4 How to Check Miswiring for Multi Branch Selector Unit ........................... 262
4. Test Operation ........................................................................................263
4.1 Checks before Test Operation ................................................................. 263
4.2 Checkpoints.............................................................................................. 263
4.3 Gas Furnace Test Operation.................................................................... 264
Part 6 Service Diagnosis ............................................................... 265
1. Symptom-based Troubleshooting ...........................................................268
1.1 Indoor Unit Overall ................................................................................... 268
1.2 With Gas Furnace .................................................................................... 271
1.3 Gas Furnace Lockout Reset..................................................................... 271
1.4 With Optional Infrared Presence/Floor Sensor......................................... 272
2. Troubleshooting with Remote Controller.................................................273
2.1 BRC1E73 ................................................................................................. 273
2.2 BRC1H71W.............................................................................................. 274
2.3 Wireless Remote Controller ..................................................................... 274
3. Troubleshooting by Error Code ...............................................................277
3.1 Error Codes and Descriptions .................................................................. 277
3.2 Error Codes (Sub Codes)......................................................................... 280
3.3 External Protection Device Abnormality ................................................... 290
3.4 Indoor Unit Control PCB Abnormality....................................................... 292
3.5 Drain Level Control System Abnormality.................................................. 293
3.6 Indoor Fan Motor Lock, Overload............................................................. 295
3.7 Indoor Fan Motor Abnormality.................................................................. 297
3.8 Overload/Overcurrent/Lock of Indoor Fan Motor...................................... 301
3.9 Blower Motor Not Running ....................................................................... 302
3.10 Indoor Fan Motor Status Abnormality....................................................... 303
3.11 Low Indoor Airflow.................................................................................... 304
3.12 Swing Flap Motor Abnormality ................................................................. 305
3.13 Power Supply Voltage Abnormality.......................................................... 307
3.14 Blower Motor Stops for Over/Under Voltage ............................................ 308
3.15 Electronic Expansion Valve Coil Abnormality, Dust Clogging .................. 309
3.16 Gas Furnace Abnormality......................................................................... 310
3.17 Drain Level above Limit............................................................................ 311
3.18 Capacity Determination Device Abnormality ............................................ 312
3.19 Transmission Abnormality between Indoor Unit Control PCB and Fan
PCB .......................................................................................................... 313
3.20 Blower Motor Communication Error ......................................................... 315
3.21 Climate Talk Communication Error .......................................................... 316
3.22 Thermistor Abnormality ............................................................................ 317
3.23 Combination Error between Indoor Unit Control PCB and Fan PCB ....... 318
3.24 Blower Motor HP Mismatch...................................................................... 319
3.25 Indoor Blower Does Not Have Required Parameters to Function............ 320