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Troubleshooting by Remote Controller SiUS281117
Service Diagnosis 161
2.42 Refrigerant Shortage
Remote
Controller
Display
U0
Applicable
Models
RZR, RZQ
Method of Error
Detection
Refrigerant shortage is detected according to the electronic expansion valve opening degree
and measured temperatures and pressures.
Error Decision
Conditions
(In cooling operation)
When the electronic expansion valve opens fully and low pressure is below 14.5 psi
continuously for 30 minutes.
(In heating operation)
When the electronic expansion valve opens fully and the suction superheat is large (more than
68°F) continuously for 30 minutes.
Error code is displayed but the system operates continuously.
Supposed
Causes
The stop valve is not opened.
Insufficient refrigerant amount
Clogged refrigerant piping system
Troubleshooting
Note: Refrigerant shortage alarm is indicated but the operation continues.
Refer to P.181.
Open the stop valve.
Is the stop valve open?
Check the refrigerant
piping system for
clogging.
Collect refrigerant. After
vacuum drying is complete,
charge an appropriate
amount of refrigerant.
Is the refrigerant
amount appropriate?
NO
NO
YES
CHECK 8
YES
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
CHECK 8
- Service 1
- RZR-P, RZQ-P(9) Series 2
- Cooling Only / Heat Pump 2
- R-410A 60Hz 2
- Table of Contents iii 4
- 1. Safety Considerations 6
- General Information 8
- Refrigerant Circuit 9
- 1.1 Cooling Only 10
- 1.2 Heat Pump 10
- 2. External Appearance 11
- 2.2 Remote Controller 12
- 2.3 Outdoor Units 12
- 1. Refrigerant Circuit 13
- Refrigerant Circuit 7 14
- 1.2 RZR36 / 42PVJU 15
- RZQ36 / 42PVJU(9) 15
- Refrigerant Circuit 9 16
- 2. Functional Parts Layout 17
- Remote Controller 18
- 1. Wired Remote Controller 19
- 1.2 Names and Functions 20
- 3P166742-1 21
- Remote Controller 15 22
- 16 Remote Controller 23
- Situation 24
- 18 Remote Controller 25
- Group No 26
- Mode No 26
- Field setting 26
- 20 Remote Controller 27
- Group Address (Unit) 27
- <Group Address (Group)> 28
- 3P107422-11J 29
- 3P107422-8S 29
- 3P107422-17M 29
- 3P107422-21S 29
- C: 3P107422-11J 30
- Introduction 31
- 3. Service Mode 32
- 3.1.2 Service Setting 33
- 3.2 BRC1E71 35
- 4. Inspection Mode 37
- Function and Control 38
- 1. Function General 39
- 2. Basic Control 40
- 2.2 Compressor PI Control 41
- SiUS281117 Basic Control 43
- 36 Function and Control 43
- 3. Special Control 44
- 3.2 Oil Return Operation 45
- 3.3 Defrosting Operation 47
- 3.5 Restart Standby 49
- 3.6 Stopping Operation 49
- 4. Protection Control 51
- "E4" is output 52
- E4" is output 52
- F3" is output 53
- L8" is output 54
- L9" is output 54
- L4" is output 54
- 5. Other Control 55
- 6.1 Drain Pump Control 56
- AF” is Displayed on the 57
- Function and Control 51 58
- Suction air temperature (TH1) 59
- : Factory setting 61
- 6.5 Freeze-up Prevention 62
- · lapse of 3 minutes 64
- · [TH2] > 93.2˚F 64
- · "Tc" > 125.6˚F 64
- The fan is ON: ON 65
- The fan is OFF: OFF 65
- 6.8 Heater Control (FTQ) 66
- 3: High pressure condition 67
- 6.8.2 Heat Pump Lockout Mode 68
- 62 Function and Control 69
- 6.10.1 Humidifier 70
- 6.10.2 Economizer 71
- 6.10.3 Air Purifier 71
- Field Setting 72
- 1. Test Operation 73
- 1.1.3 Check Operation 74
- SiUS281117 Test Operation 75
- 68 Field Setting 75
- UH” error 76
- UH” or “U4” 76
- 2.1 Wired Remote Controller 77
- 2.1.2 BRC1E71 78
- 72 Field Setting 79
- FIELD SETTING MODE 80
- SECOND CODE NO 80
- FIRST CODE NO 80
- 74 Field Setting 81
- Field Setting 75 82
- Filter Sign Setting 83
- Electrical Heater Setting 83
- (Local Setting) 85
- How to Select Operation Mode 86
- Outdoor Unit PCB 87
- 3.2 Setting by DIP Switches 88
- 3.3 Setting by BS Buttons 88
- Mode changing procedure 89
- 3.4 Setting Mode 1 90
- 3.5 Setting Mode 2 91
- Field Setting 85 92
- 3.6 Monitor Mode 93
- X X X X X X 94
- Operation sound 95
- Demand level 1 instructing 97
- (1) (2) (3) : Factory setting 98
- 92 Field Setting 99
- 3.7.6 Check Operation 100
- Service Diagnosis 101
- SiUS281117 102
- Service Diagnosis 95 102
- Circuit breaker 103
- 88" 105
- 2.1 Mode ChangeOver 106
- UNIT No 107
- Operation lamp 108
- Error code 108
- Applicable 108
- "UP" button 109
- "DOWN" button 109
- 2.4 Error Codes - Sub Codes 111
- 2.4.2 Outdoor Unit 112
- Service Diagnosis 107 114
- 108 Service Diagnosis 115
- Actuation of external 116
- Replace the indoor unit PCB 116
- Change the second code No 116
- 110 Service Diagnosis 117
- Service Diagnosis 111 118
- Troubleshooting 119
- Service Diagnosis 113 120
- Remove the foreign matter 121
- Connect correctly 121
- Replace the fan motor 121
- Service Diagnosis 115 122
- Service Diagnosis 117 124
- 118 Service Diagnosis 125
- 2.13 Drain System Abnormality 127
- Install a capacity setting 128
- 122 Service Diagnosis 129
- 01" 130
- , or parts may be damaged 131
- 126 Service Diagnosis 133
- FBQ18/24/30 PC0609-2 133
- FBQ36/42 PC0609-3 133
- 128 Service Diagnosis 135
- Abnormality 136
- External factor (Noise, etc.) 137
- Replace the outdoor unit 137
- Check the fan motor 137
- Service Diagnosis 131 138
- Service Diagnosis 133 140
- Service Diagnosis 135 142
- Open the stop valve 143
- Remedy the cause 143
- Replace the compressor 143
- Service Diagnosis 137 144
- 138 Service Diagnosis 145
- E9" recur? 146
- 140 Service Diagnosis 147
- Service Diagnosis 141 148
- 144 Service Diagnosis 151
- Service Diagnosis 145 152
- H9, J3, J5, J6 153
- Service Diagnosis 147 154
- Service Diagnosis 149 156
- Service Diagnosis 151 158
- P4" 160
- L4" 160
- P4" troubleshooting 160
- Compressor inspection 161
- Service Diagnosis 155 162
- Output current check 163
- 2.39 Inverter Startup Error 164
- E7" 166
- LC") 166
- Continue the operation 167
- 2.42 Refrigerant Shortage 168
- 162 Service Diagnosis 169
- 164 Service Diagnosis 171
- Service Diagnosis 165 172
- U4" 174
- Indoor Unit) 175
- Controller and Indoor Unit) 177
- 2.49 System is not Set yet 179
- Service Diagnosis 173 180
- 174 Service Diagnosis 181
- Check for Fan Motor Connector 182
- Outdoor Unit 183
- Thermistors 184
- Overview of Thermistors 184
- Checking 184
- Table 1 Table 2 Table 3 185
- Check Pressure Sensor 186
- 180 Service Diagnosis 187
- Clogged Points 188
- Appendix 189
- C: 3D062238C 190
- 3D065366A 191
- 4D024460F 192
- 4D034245F 192
- FTQ18PAVJU 193
- FTQ24PAVJU 193
- 2. Wiring Diagrams 194
- RZR36PVJU / RZR42PVJU 195
- RZQ36PVJU9 / RZQ42PVJU9 195
- 2.2 Indoor Unit 196
- FHQ36MVJU / FHQ42MVJU 197
- FAQ18PVJU / FAQ24PVJU 198
- ( ) 199
- 3D065036F 200
- SiUS281117 Wiring Diagrams 201
- 194 Appendix 201
- Cautions on product corrosion 202
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(24 Seiten)
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