Daikin BRC7E61W Service Manual Page 205
- Page / 266
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
Rated. / 5. Based on customer reviews
Troubleshooting by Indication on the Unified ON/OFF Control SiENBE34-703
194 Troubleshooting
[CHECK 2] Check for causes of drop in low pressure
Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points.
Abnormally low
low-pressure
(Low evaporating
temperature)
[In cooling]
(See *1.)
Faulty low
pressure
control
Faulty
compressor
capacity
control
Faulty low pressure sensor
Are the electrical characteristics normal?
Faulty control PCB
Is the pressure value checked with the Service Checker
corresponding to the measurement of the pressure sensor?
Faulty low
pressure
protection
control
Faulty low pressure sensor
Are the electrical characteristics normal?
Faulty hot gas solenoid valve
Are the coil resistance and insulation normal?
Faulty control PCB
Is the pressure value checked with the Service Checker
corresponding to the measurement of the pressure sensor?
[In both cooling
and heating]
(See *2.)
[In cooling]
If the indoor unit
electronic
expansion valve is
throttled too much:
(See *3.)
Faulty indoor
unit electronic
expansion valve
Faulty valve coil
Faulty valve body
Are the coil resistance and insulation normal?
Faulty
control
Faulty gas pipe
thermistor of indoor unit
Faulty liquid pipe thermistor
of indoor unit
Faulty control PCB
Check for the thermistor resistance and connection.
Check for the thermistor resistance and connection.
Is the pressure value checked with the Service Checker
corresponding to the measurement of the pressure sensor?
Faulty outdoor
unit electronic
expansion valve
Faulty valve coil
Faulty valve body
Are the coil resistance and insulation
normal?
[In heating]
If the outdoor unit
electronic
expansion valve
excessively
throttled:
(See *4.)
Faulty
control
Faulty low pressure sensor
Faulty suction pipe thermistor
Faulty control PCB
Are the electrical characteristics normal?
Check for the thermistor resistance and
connection.
[In cooling]
Low suction air
temperature of
the evaporator
[In heating]
Low suction air
temperature of
indoor unit
Short circuit
Is the suction air temperature not less than 14°C
Is the indoor temperature not less than 14°C
Low ambient temperature
Faulty suction air thermistor of indoor unit
Is the connector properly connected?
Are the thermistor resistance characteristics normal?
Low suction air temperature of outdoor unit
Is the outdoor temperature not less than -15°C
Faulty outdoor temperature thermistor of outdoor unit
Is the connector properly connected?
Are the thermistor resistance characteristics normal?
High pipe
resistance
Abnormal piping length
Bent or crashed pipe
Clogging of foreign particles
Stop valve closed
Does the piping length fall in the permissible range?
Conduct visual checks for pipe conditions.
Is there any temperature difference caused before
and after the filter or branch pipe?
Check to be sure the stop valve is open.
Less
circulation
quantity of
refrigerant
Degradation
in condensing
capacity
Inadequate refrigerant quantity
Refer to page 164.
Moisture choke
Eliminate moisture by vacuum operation.
Dirty evaporator
Decreased
fan airflow
rate
Decreased
fan output
Faulty fan motor
Can the fan motor be rotated with hands?
Are the motor coil resistance and insulation normal?
Is the heat exchanger clogged?
Faulty control PCB
(Including capacity setting)
If a spare PCB is mounted, is the capacity
setting properly made?
High air
passage
resistance
Dirty filter
Is there any obstacle in the air passage?
Is the air filter clogged?
Obstacle
*1: For details of the compressor capacity control while in cooling, refer to “Compressor PI Control” on page 42.
*2: The “low pressure protection control” includes low pressure protection control and hot gas bypass control. For details, refer to page 53.
*3: In cooling, the indoor unit electronic expansion valve is used for “superheated degree control”.
*4: In heating, the outdoor unit electronic expansion valve (EV1) is used for “superheated degree control of outdoor unit heat exchanger”.
(For details, refer to page 43.)
Faulty electronic
expansion valve
control
C: SDK04009
- Service 1
- Heat Pump 2
- Table of Contents iii 4
- 1. Introduction 6
- 1.1.3 Inspection after Repair 8
- 1.1.4 Using Icons 9
- 1.1.5 Using Icons List 9
- 1.2 PREFACE 10
- Introduction SiENBE34-703 11
- General Information 12
- *Indoor Units 13
- Outdoor Units 13
- 2. External Appearance 14
- 3. Capacity Range 15
- Specifications 16
- 1. Specifications 17
- SiENBE34-703 Specifications 18
- Specifications 7 18
- 1.2 Indoor Units 19
- Specifications 9 20
- Specifications SiENBE34-703 21
- 10 Specifications 21
- Specifications 11 22
- 12 Specifications 23
- Specifications 13 24
- 14 Specifications 25
- ()()()() 26
- 16 Specifications 27
- Specifications 17 28
- 18 Specifications 29
- Ceiling Mounted Built-in Type 30
- Ceiling Mounted Duct Type 34
- Ceiling Suspended Type 35
- Wall Mounted Type 36
- Floor Standing Type 38
- Concealed Floor Standing Type 40
- Specifications 31 42
- BEV Units 43
- List of Electrical and 44
- Functional Parts 44
- 1.1 Outdoor Unit 45
- Refrigerant Circuit 46
- 1. Refrigerant Circuit 47
- Refrigerant Circuit 37 48
- 2. Functional Parts Layout 49
- Function 50
- 1. Operation Mode 51
- 2. Basic Control 52
- 2.2 Compressor PI Control 53
- Fan Steps 55
- 3. Special Control 56
- 3.2 Oil Return Operation 57
- 3.3 Defrosting Operation 59
- 3.5 Restart Standby 61
- 3.6 Stopping Operation 62
- 4. Protection Control 63
- [In cooling operation] 64
- [INV compressor] 65
- Function 55 66
- 5. Other Control 67
- 6.1 Drain Pump Control 68
- 58 Function 69
- Posición de 70
- 60 Function 71
- Function 61 72
- 6.4 Freeze Prevention 73
- · lapse of 3 minutes 75
- · [TH2]>34°C 75
- · "Tc">52°C 75
- Test Operation 76
- 1. Test Operation 77
- 1.1.3 Check Operation 78
- Test Operation SiENBE34-703 79
- 68 Test Operation 79
- Outdoor unit PC board 81
- 3. Field Setting 82
- First code No 83
- Second code No 83
- Mode No 83
- Test Operation 73 84
- 74 Test Operation 85
- ∗1 Static pressure selection 86
- F2 T1 T2 87
- Air Flow Direction Setting 89
- Setting Table 90
- GROUP NO 91
- MODE NO 91
- FIELD SET 91
- BRC7C Type 92
- BRC7E Type 92
- BRC4C Type 92
- Group No. Setting 92
- (Local Setting) 93
- How to Select 94
- Operation Mode 94
- 3.2.1 Setting by Dip Switches 95
- Test Operation 85 96
- 86 Test Operation 97
- H1P H2P H3P H4P H5P H6P H7P 97
- LED indication 97
- Test Operation 87 98
- SiENBE34-703 Field Setting 100
- Test Operation 89 100
- Field Setting SiENBE34-703 101
- 90 Test Operation 101
- SET (BS2) button 102
- 977 7997 103
- 9 797997 103
- 977 7979 103
- MALFUNC 104
- C/H select 105
- Test Operation 95 106
- Setting of Demand Operation 107
- Test Operation 97 108
- : ON ): OFF 9: Blink 109
- Service port 110
- 100 Test Operation 111
- 8:ON 3:OFF 9:BLINK) 112
- CHECK OPERATION FUNCTION 112
- 102 Test Operation 113
- Troubleshooting 114
- SiENBE34-703 115
- 104 Troubleshooting 115
- Circuit breaker 116
- 108 Troubleshooting 119
- Troubleshooting 109 120
- “Advance” button 121
- “Backward” button 121
- Operation Button 123
- Normal operation 124
- Field set mode 124
- Service mode 124
- Troubleshooting 115 126
- 118 Troubleshooting 129
- Troubleshooting 119 130
- 120 Troubleshooting 131
- Troubleshooting 121 132
- All indoor unit models 133
- ! Improper field set 133
- Troubleshooting 123 134
- System (S1L) 135
- ! Fan motor lock 137
- Troubleshooting 127 138
- ! Defect of connecting cable 140
- Troubleshooting 131 142
- 132 Troubleshooting 143
- Heat Exchanger 144
- 134 Troubleshooting 145
- Suction Air 146
- 136 Troubleshooting 147
- Troubleshooting 137 148
- 138 Troubleshooting 149
- Troubleshooting 139 150
- Troubleshooting 141 152
- Troubleshooting 143 154
- 144 Troubleshooting 155
- Troubleshooting 145 156
- Temperature 158
- 148 Troubleshooting 159
- Outdoor Air 160
- Thermistor (R2T) 161
- Troubleshooting 151 162
- Outdoor Unit Heat Exchanger 163
- Outdoor Unit Liquid Pipe 164
- 154 Troubleshooting 165
- Troubleshooting 155 166
- 156 Troubleshooting 167
- Troubleshooting 157 168
- Temperature Rise 169
- Compressor inspection 170
- 160 Troubleshooting 171
- Troubleshooting 161 172
- Inverter and Control PC Board 173
- Inverter Circuit 174
- 164 Troubleshooting 175
- 166 Troubleshooting 177
- RXYSQ4~6P 179
- Troubleshooting 169 180
- Troubleshooting 171 182
- 172 Troubleshooting 183
- AII indoor unit models 184
- Troubleshooting 175 186
- Troubleshooting 177 188
- Troubleshooting 179 190
- Undefined 191
- Troubleshooting 181 192
- 4.2 “M1” PC Board Defect 193
- Centralized remote control 194
- Centralized Control 195
- OFF Control 198
- Is the transmission wiring 199
- (Repeats Single Blink) 200
- Troubleshooting 191 202
- (Repeats Double Blink) 203
- Troubleshooting 193 204
- 194 Troubleshooting 205
- 196 Troubleshooting 207
- Appendix 208
- 1. Piping Diagrams 209
- 1.2 Indoor Unit 210
- 4D043864H 211
- FXUQ + BEVQ 212
- Indoor Unit 212
- Connection Unit 212
- TO IN/D UNIT 213
- TO OUT/D UNIT 213
- 2.2 Field Wiring 214
- 2.3 Indoor Unit 215
- FXCQ40 / 50 / 80 / 125M8V3 216
- Wiring Diagrams SiENBE34-703 217
- 206 Appendix 217
- SiENBE34-703 Wiring Diagrams 218
- Appendix 207 218
- 208 Appendix 219
- FXDQ20P / 25P / 32P 220
- FXDQ20 / 25M8V3 221
- Appendix 211 222
- POWER SUPPLY 223
- FXHQ32MA / 63MA / 100MAVE 224
- INDOOR UNIT 225
- Appendix 215 226
- FXUQ71MA / 100MA / 125MAV1 227
- BEVQ71MA / 100MA / 125MAVE 228
- 3. Option List 229
- Building management system 230
- C: 3D045727B 231
- SiENBE34-703 Option List 232
- Appendix 221 232
- 4. Example of Connection 233
- Branch with refnet header 234
- 224 Appendix 235
- Characteristics 236
- Outdoor Unit 237
- Thermistors for 237
- Discharge Pipe 237
- 6. Pressure Sensor 238
- Transistors Modules 239
- Appendix 229 240
- 230 Appendix 241
- Precautions for New 242
- Refrigerant (R-410A) 242
- 1.1 Outline 243
- 1.2 Refrigerant Cylinders 245
- 1.3 Service Tools 246
- Flare gauge 247
- For class-1: R-407C 247
- For class-2: R-410A 247
- Dimension A 247
- (Hose with ball valve) 250
- Removal Procedure 252
- 1. RXYSQ4 · 5 · 6 P7Y1B 253
- Front panel (1) 254
- Discharge grill 254
- Reinforce plate 254
- Ambient air 255
- Propeller fan 256
- Nut with a washer 256
- 246 Removal Procedure 257
- Procedure Points 257
- Terminal cover 258
- Removal Procedure 249 260
- 250 Removal Procedure 261
- Drawings & Flow Charts 264
- ÉSiENBE34-703kËÍ 266
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