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Troubleshooting for Outdoor Unit SiBE18-821_C

386 Troubleshooting

7.3 Actuation of Low Pressure Sensor

Remote

Controller

Display

Method of

Malfunction

Detection

Detection by the pressure value with the low pressure sensor

Malfunction

Decision

Conditions

When the low pressure is dropped under specific pressure

Operating pressure: 0.07 MPa

Supposed

Causes



Abnormal drop of low pressure (Lower than 0.07 MPa)



Defective low pressure sensor



Defective outdoor unit PCB



Stop valve is not opened.

Table of Contents3
Part 1 List of Functions3
Part 2 Specifications3
Part 3 Printed Circuit Board Connector Wiring Diagram3
Part 4 Refrigerant Circuit3
Part 5 Function3
Introduction8
- Safety Cautions8
- Used Icons12
Part 1 List of Functions13
Functions14
Part 2 Specifications22
Part 2 Specifications23
Specifications23
- Outdoor Unit23
- BP Unit24
- Indoor Unit25
Part 3 Printed Circuit Board Connector Wiring Diagram38
Outdoor Unit39
- Rmxs112/140/160E8V1B39
BP Unit42
- Bpmks967B2B/B3B42
Indoor Unit43
- Wall Mounted Type43
- Floor Standing Type56
- Floor / Ceiling Suspended Dual Type58
- Duct Connected Type60
- Ceiling Mounted Cassette Type62
- Ceiling Mounted Built-In Type66
- Ceiling Suspended Type71
Remote Controller73
- Wired Remote Controller73
- Wireless Remote Controller75
Part 4 Refrigerant Circuit77
Refrigerant Circuit78
- Outdoor Unit78
- Refrigerant Circuit Part78
- BP Unit80
Functional Parts Layout81
- Outdoor Unit81
Refrigerant Flow for each Operation Mode83
- Cooling Operation83
- Heating Operation84
- Cooling Oil Return Operation85
- Heating Oil Return Operation & Defrost Operation86
Part 5 Function87
Operation Mode89
Basic Control90
- Normal Operation90
- Compressor PI Control91
- Electronic Expansion Valve PI Control92
- Cooling Operation Fan Control93
Special Control94
- Startup Control94
- Oil Return Operation95
- Defrosting Operation97
- Pump-Down Residual Operation98
- Restart Standby99
- Stopping Operation99
Protection Control100
- High Pressure Protection Control100
- Low Pressure Protection Control101
- Discharge Pipe Temperature Protection Control102
- Inverter Protection Control103
- Freeze-Up Protection Control104
- Dew Condensation Prevention Control105
Other Control106
- Demand Control106
- Heating Operation Prohibition Control106
BP Unit Control107
- BP Unit Command Conversion107
- BP Unit Electronic Expansion Valve Control108
- SH Control in Cooling Operation110
- SC Control in Heating Operation111
- Heat Exchanger Isothermal Control in Heating Operation111
Indoor Unit Control (RA Models)112
- Temperature Control112
- Operation Starting Control113
- Airflow Direction Control114
- Fan Speed Control for Indoor Units116
- Program Dry Operation117
- Automatic Operation118
- Thermostat Control119
- NIGHT SET Mode121
- ECONO Operation122
- HOME LEAVE Operation123
- 2-Area INTELLIGENT EYE Operation124
- INTELLIGENT EYE Operation126
- Inverter POWERFUL Operation127
- Other Functions129
- Weekly Timer Operation130
Indoor Unit Control (SA Models)131
- Drain Pump Control131
- Thermostat Sensor in Remote Controller133
- Freeze Prevention Control135
- Hot Start Control (in Heating Operation Only)136
Part 6 Test Operation and Field Settings137
Test Operation138
- Procedure and Outline138
- Check Operation139
- Operation When Power Is Turned on140
- Outdoor Unit PCB Layout141
- BP Unit142
- RA Indoor Unit - F(C)TXG, FTXS, FVXS, FLXS, FDXS Series144
- SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series146
- Check Points146
Field Settings148
- Outdoor Unit148
- RA Indoor Unit - F(C)TXG, FTXS, FVXS, FLXS, FDXS Series166
- SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series170
Part 7 Operation Manual178
System Configuration179
Outdoor Unit180
- RMXS Series180
- FTXG-J, CTXG-J Series - ARC466A1181
- Name of Parts181
- Signal Transmitter183
- Temperature Adjustment Buttons183
- Mode Selector Button184
- Off Timer Button184
  - Fan Operation185
  - Operating Conditions186
- Operation Manual186
  - Adjusting the Airflow Direction and Rate187
  - Comfort Airflow Operation189
- Powerful Operation192
- FTXS-G, FVXS Series - ARC452A1, A3204
- Arc433B41, B67, B69, B70239
- FTXG-E, CTXG-E, FTXS-F, FLXS, FDXS Series239
RA Indoor Unit181
SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series263
- Brc1D528263
- Brc1E51A7278
- Brc7E530W, Brc7F532F, Brc7Ea63W323
  - Operation Range326
  - Operation Procedure327
Part 8 Troubleshooting335
Troubleshooting with LED337
- Outdoor Unit337
- BP Unit342
- Indoor Unit343
- Operation Lamp343
Service Check Function346
- RA Indoor Unit - F(C)TXG, FTXS, FVXS, FLXS, FDXS Series346
- SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series355
Error Codes and Description362
Troubleshooting for RA Indoor Unit364
- Indoor Unit PCB Abnormality364
- Freeze-Up Protection Control or Heating Peak-Cut Control365
- Fan Motor or Related Abnormality367
- Thermistor or Related Abnormality (Indoor Unit)370
- Front Panel Open / Close Fault371
- Fan Motor Connector Output Check372
- Check for RA Indoor Unit372
  - Thermistor Resistance Check373
  - Hall IC Check374
Troubleshooting for SA Indoor Unit375
- Indoor Unit PCB Abnormality375
- Drain Water Level System Abnormality376
- Fan Motor or Related Abnormality (FHQ Series)378
- Swing Motor Lock (FHQ Series)379
- Drain System Abnormality380
- Indoor Liquid Pipe Thermistor (R2T) Abnormality381
- Indoor Heat Exchanger Thermistor (R3T) Abnormality382
- Suction Air Thermistor (R1T) Abnormality383
- Remote Controller Thermistor Abnormality384
- Transmission Error between Remote Controller and Indoor Unit385
- Transmission Error between Main and Sub Remote Controllers386
- Field Setting Switch Abnormality387
Troubleshooting for BP Unit388
- Electronic Expansion Valve Abnormality388
- BP Unit PCB Abnormality389
- BP Liquid or Gas Pipe Thermistor Abnormality390
- Transmission Error between Indoor Unit and BP Unit391
- Transmission Error between Outdoor Unit and BP Unit393
- Power Supply Waveforms Check394
- Check for BP Unit394
Troubleshooting for Outdoor Unit395
- Outdoor Unit PCB Abnormality395
- Actuation of High Pressure Switch396
- Actuation of Low Pressure Sensor398
- Compressor Motor Lock400
- Outdoor Fan Motor Abnormality401
- Moving Part of Electronic Expansion Valve (Y1E, Y3E) Abnormality402
- Discharge Pipe Temperature Abnormality404
- Refrigerant Overcharged405
- Outdoor Temperature Thermistor (R1T) Abnormality406
- Discharge Pipe Thermistor (R2T) Abnormality407
- Suction Pipe Thermistor (R3T, R5T) Abnormality408
- Outdoor Heat Exchanger Thermistor (R4T) Abnormality409
- Outdoor Liquid Pipe Thermistor (R7T) Abnormality410
- Subcooling Heat Exchanger Gas Pipe Thermistor (R6T) Abnormality411
- High Pressure Sensor Abnormality412
- Low Pressure Sensor Abnormality413
- Outdoor Unit PCB Abnormality414
- Radiation Fin Temperature Rise415
- Inverter Compressor Abnormality416
- Inverter Current Abnormality417
- Compressor Start-Up Error418
- High Voltage of Capacitor in Main Inverter Circuit419
- Radiation Fin Thermistor Abnormality420
- Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Abnormality421
- Power Supply Insufficient or Instantaneous Failure423
- Check Operation Is Not Conducted424
- Transmission Error between Remote Controller and Indoor Unit425
- Transmission Error between Main and Sub Remote Controllers426
- Transmission Error between Indoor Unit and Outdoor Unit in the same System427
- Excessive Number of Indoor Units429
- Address Duplication of Central Remote Controller430
- Transmission Error between Centralized Remote Controller and Indoor Unit431
- System Is Not Set yet433
- System Abnormality, Refrigerant System Address Undefined434
- Check for Outdoor Unit435
- Troubleshooting436
- Fan Motor Connector Check437
Thermistor Resistance / Temperature Characteristics439
Pressure Sensor441
Method of Replacing Inverter's Power Transistors Modules442
Part 9 Removal Procedure444
- Outdoor Unit445
- Removal of Outer Panels445
- Removal of Pcbs / Electrical Components448
- Removal of Outdoor Fans / Fan Motors455
- Removal of Thermistors457
- Removal of Electronic Expansion Valves / Peripheral Equipments458
- Removal of Four Way Valve462
- Removal of Compressor463
- BP Unit466
- Removal of PCB Assembly466
- Removal of Electronic Expansion Valve Coils469
Part 10 Appendix472
Piping Diagrams473
- Indoor Unit475
Wiring Diagrams481
- Indoor Unit483

Brand	Daikin
Model	Super Multi Plus E-Series FFQ50B8V1B
Category	Air Conditioner
Language	English

Daikin Super Multi Plus E-Series FFQ50B8V1B User Manual

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