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REYQ72TATJU
Daikin REYQ72TATJU User Manual
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Service
Manual
SiUS371614E
REYQ72-4
56TAYDU
REYQ72-456
TATJU
Heat Recovery
60 Hz
2
Table of Contents
Default Chapter
3
Table of Contents
3
Safety Cautions
8
Warnings and Cautions Regarding Safety of Workers
8
Warnings and Cautions Regarding Safety of Users
10
Icons Used
13
Part 1 General Information
14
Model Names of Indoor/Outdoor Units
15
Indoor Unit
15
DOAS Unit
15
Outdoor Unit
15
Air Treatment Equipment
17
Branch Selector Unit
17
External Appearance
18
Indoor Unit
18
DOAS Unit
19
Outdoor Unit
19
Air Treatment Equipment
20
Branch Selector Unit
20
Combination of Outdoor Units
21
Capacity Range
22
Combination Ratio
22
Outdoor Unit Combinations
22
Limitation of Capacity Index for Heat Recovery
23
Part 2 Refrigerant Circuit
24
Outdoor Unit
25
Refrigerant Circuit Part
25
Indoor Unit
29
Outdoor-Air Processing Unit
31
Branch Selector Unit
32
Functional Parts Layout
38
Reyq72Taydu
38
Reyq96/120Taydu
39
Reyq144/168Taydu
40
Reyq72Tatju
41
Reyq96/120Tatju
42
Reyq144/168Tatju
43
Refrigerant Flow for each Operation Mode
44
Reyq72Taydu, Reyq72Tatju
44
Reyq96-168Taydu, Reyq96-168Tatju
50
Part 3 Remote Controller
56
Applicable Models
57
Names and Functions
58
Brc1E73
58
Wireless Remote Controller
60
MAIN/SUB Setting
61
Brc1E73
61
Wireless Remote Controller
62
Centralized Control Group No. Setting
63
Brc1E73
63
Wireless Remote Controller
65
Group No. Setting Example
66
Service Mode
67
Brc1E73
67
Part 4 Functions and Control
69
Operation Flowchart (Outdoor Unit)
71
Stop Control
72
Stop Due to Error
72
When System Is in Stop Mode
72
Slave Unit Stops During Master Unit Operation
72
Standby Control
73
Restart Standby
73
Crankcase Heater Control
73
Startup Control
74
Startup Control in Cooling
74
Startup Control in Heating
75
Basic Control
76
Normal Operation
76
Compressor PI Control
77
Operation Priority and Rotation of Compressors
77
Compressor Step Control
79
Electronic Expansion Valve PI Control
82
Step Control of Outdoor Fans
83
Heat Exchanger Control
85
Protection Control
86
High Pressure Protection Control
86
Low Pressure Protection Control
88
Discharge Pipe Protection Control
89
Compressor Body Protection Control
90
Inverter Protection Control
91
Special Control
93
Pump down Residual Operation
93
Oil Return Operation
94
Defrost Operation
96
Cooling/Heating Mode Switching
97
Other Control
101
Backup Operation
101
Demand Operation
101
Heating Operation Prohibition
101
Outline of Control (Indoor Unit)
102
Operation Flowchart
102
Set Temperature and Control Temperature
104
Remote Controller Thermistor
106
Thermostat Control
108
Drain Pump Control
111
Control of Electronic Expansion Valve
113
Freeze-Up Prevention
114
List of Swing Flap Operations
116
Hot Start Control (in Heating Only)
117
Louver Control for Preventing Ceiling Dirt
118
Heater Control (Except FXTQ-TA Models)
119
Heater Control (FXTQ-TA Models)
120
Step Thermostat Processing (FXTQ-TA Models)
123
Fan Control (Heater Residual) (FXTQ-TA Models)
124
Interlocked with External Equipment (FXTQ-TA Models)
124
Part 5 Field Settings
126
Field Setting from Remote Controller
127
Wired Remote Controller
127
Wireless Remote Controller
129
Simplified Remote Controller
130
Setting Contents and Code No. for Indoor Units
131
Field Setting from Outdoor Unit
149
Accessing the BS Buttons on the Logic Board
149
Operating the BS Buttons and DIP Switches on the Logic Board
150
Connecting of the Optional PC Configurator Cable to the Outdoor Unit
152
Monitoring Function and Field Settings
153
Cool / Heat Mode Changeover
162
Setting of Night-Time Low Noise Operation and Demand Operation
163
Test Operation
168
Checks before Test Operation
168
Checkpoints
168
Part 6 Service Diagnosis
169
Symptom-Based Troubleshooting
172
Indoor Unit Overall
172
With Optional Infrared Presence/Floor Sensor
175
Service Check Function
176
Wired Remote Controller
176
Wireless Remote Controller
178
Error Codes and Descriptions
180
Error Codes - Sub Codes
182
Troubleshooting by Error Code
183
External Protection Device Abnormality
183
Indoor Unit PCB Abnormality
185
Drain Level Control System Abnormality
186
Fan Motor Lock, Overload
188
Indoor Fan Motor Abnormality
191
Overload/Overcurrent/Lock of Indoor Fan Motor
195
Blower Motor Not Running
196
Indoor Fan Motor Status Abnormality
197
Low Indoor Airflow
198
Swing Flap Motor Abnormality
199
Power Supply Voltage Abnormality
201
Blower Motor Stops for Over/Under Voltage
202
Electronic Expansion Valve Coil Abnormality, Dust Clogging
203
Drain Level above Limit
204
Capacity Determination Device Abnormality
205
Transmission Abnormality between Indoor Unit PCB and Fan PCB
206
Blower Motor Communication Error
208
Thermistor Abnormality
209
Combination Error between Indoor Unit PCB and Fan PCB
210
Blower Motor HP Mismatch
211
Indoor Blower Does Not Have Required Parameters to Function
212
Remote Sensor Abnormality
213
Humidity Sensor System Abnormality
214
Infrared Presence/Floor Sensor Error
215
Remote Controller Thermistor Abnormality
220
Outdoor Unit Main PCB Abnormality
221
Actuation of High Pressure Switch
222
Actuation of Low Pressure Sensor
224
Inverter Compressor Motor Lock
225
Compressor Damage Alarm
227
Outdoor Fan Motor Abnormality
229
Electronic Expansion Valve Coil Abnormality
231
Discharge Pipe Temperature Abnormality
232
Wet Alarm
234
Refrigerant Overcharged
235
Harness Abnormality (between Outdoor Unit Main PCB and Inverter PCB)
236
Outdoor Fan Motor Signal Abnormality
237
Thermistor Abnormality
238
High Pressure Sensor Abnormality
240
Low Pressure Sensor Abnormality
241
Inverter PCB Abnormality
242
Reactor Temperature Rise Abnormality
244
Inverter Radiation Fin Temperature Rise Abnormality
245
Inverter Compressor Instantaneous Overcurrent
246
Inverter Compressor Overcurrent
248
Inverter Compressor Startup Abnormality
250
Transmission Error between Inverter PCB and Outdoor Unit Main PCB
253
Power Supply Voltage Imbalance
255
Reactor Temperature Abnormality
257
Inverter Radiation Fin Temperature Abnormality
258
Field Setting after Replacing Outdoor Unit Main PCB Abnormality or Combination of PCB Abnormality
259
Refrigerant Shortage
260
Reverse Phase, Open Phase
261
Power Supply Insufficient or Instantaneous Abnormality
262
Check Operation Not Executed
264
Transmission Error between Indoor Units and Outdoor Units
265
Transmission Error between Remote Controller and Indoor Unit
268
Transmission Error between Outdoor Units
269
Transmission Error between Main and Sub Remote Controllers
275
Transmission Error between Indoor Unit and Outdoor Unit in the same System
276
Improper Combination of Indoor Unit and Outdoor Unit, Indoor Unit and Remote Controller
277
Incorrect Electric Heater Capacity Setting
281
Address Duplication of Centralized Controller
282
Transmission Error between Centralized Controller and Indoor Unit
283
System Not Set yet
285
System Abnormality, Refrigerant System Address Undefined
286
Check
288
High Pressure Check
288
Low Pressure Check
289
Superheat Operation Check
290
Power Transistor Check
291
Refrigerant Overcharge Check
292
Refrigerant Shortage Check
293
Vacuuming and Dehydration Procedure
294
Thermistor Check
295
Pressure Sensor Check
298
Broken Wire Check of the Relay Wires
299
Fan Motor Connector Check (Power Supply Cable)
300
Fan Motor Connector Check (Signal Cable)
300
Electronic Expansion Valve Coil Check
301
Part 7 Appendix
302
Wiring Diagrams
303
Outdoor Unit
303
Indoor Unit
309
Air Treatment Equipment
316
Branch Selector Unit
319
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Daikin REYQ72TATJU Specifications
General
Model
REYQ72TATJU
Category
Heat Pump
Refrigerant
R-410A
HSPF Rating
9.0
Cooling Capacity
72000 BTU/h
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