Daikin D-Series - Outdoor Unit; Removal of Outer Panels

Daikin D-Series

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Outdoor Unit Si18-525B

402 Removal Procedure

1. Outdoor Unit

1.1 Removal of Outer Panels

Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies

before disassembling work.

Step

Procedure Points

1. Appearance.

Top panel

Front panel

Pipe outlet port

(Q0446)

Outdoor air

thermistor

Rear protective net

(Q0447)

Table of Contents

Table of Contents4
Introduction9
- Safety Cautions9
- Used Icons13
Part 1 List of Functions14
List of Functions15
- Cooling Only15
- Heat Pump26
Part 2 Specifications34
Specifications35
- Cooling Only35
- Heat Pump55
Part 3 Printed Circuit Board Connector Wiring Diagram72
Printed Circuit Board Connector Wiring Diagram73
- Outdoor Unit73
- Branch Provider Unit79
- Wall Mounted Type80
- Duct Connected Type89
- Floor / Ceiling Suspended Dual Type91
- Floor Standing Type94
- Ceiling Mounted Cassette Type (600×600)97
- Ceiling Mounted Cassette Type (950×950)100
- Ceiling Mounted Built-In Type103
- Ceiling Suspended Type105
Part 4 Refrigerant Circuit108
Refrigerant Circuit109
- Outdoor Units109
- Refrigerant Circuit Part109
- BP Units111
Functional Parts Layout112
- Outdoor Units112
Refrigerant Flow for each Operation Mode113
- Cooling Operation113
- Heating Operation114
- Cooling Oil Return Operation115
- Heating Oil Return Operation & Defrost Operation116
Part 5 Function118
Operation Mode120
Basic Control121
- Normal Operation121
- Compressor PI Control122
- Electronic Expansion Valve PI Control125
- Cooling Operation Fan Control126
Special Control127
- Startup Control127
- Oil Return Operation128
- Defrosting Operation130
- Pump-Down Residual Operation131
- Restart Standby131
- Stopping Operation132
- Pressure Equalization Prior to Startup132
Protection Control133
- High Pressure Protection Control133
- Low Pressure Protection Control135
- Discharge Pipe Protection Control136
- Inverter Protection Control137
- Freeze-Up Protection Control138
- Dew Condensation Prevention Control139
Other Control140
- Demand Operation140
- Heating Operation Prohibition140
BP Unit Control141
- BP Unit Command Conversion141
- BP Unit Electronic Expansion Valve Control142
- SH Control in Cooling Operation144
- SC Control in Heating Operation145
- Heat Exchanger Isothermal Control in Heating Operation145
Indoor Unit (RA Models)146
- Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing146
- Fan Speed Control for Indoor Units147
- Programme Dry Function148
- Automatic Operation149
- Thermostat Control150
- Night Set Mode151
- ECONO Mode152
- MOLD PROOF Operation152
- Intelligent Eye153
- HOME LEAVE Operation155
- Inverter POWERFUL Operation156
- 7.12 Other Functions157
Indoor Unit (Skyair Models)159
- Function Outline159
- Electric Function Parts160
- Function Details161
Part 6 Test Operation172
Test Operation173
- Procedure and Outline173
Outdoor Unit PCB Layout178
Field Setting179
- Field Setting from Outdoor Unit179
- Detail of Setting Mode185
Field Setting for Skyair Indoor Unit195
- Explanation195
- Field Setting196
- Initial Setting Contents197
- Local Setting Mode Number198
- Detailed Explanation of Setting Modes199
- Centralized Group No. Setting203
- Maintenance Mode Setting204
Test Operation and Field Setting for RA Indoor Unit205
- Test Operation from the Remote Controller205
- Jumper Settings206
Part 7 System Configuration208
System Configuration209
- Operation Instructions209
Instruction210
- Outdoor Units210
- Wall Mounted, Duct, Floor/Ceiling, Floor Standing, Wall Built-In Type211
- Wall Mounted, Duct, Floor/Ceiling, Floor Standing211
- Wall Built-In Type211
- Ceiling Mounted Cassette Type291
- Ceiling Mounted Built-In Type302
- Ceiling Suspended Type312
Part 8 Troubleshooting324
Caution for Diagnosis326
- Troubleshooting with Operation Lamp326
- Troubleshooting with the LED on the Skyair Indoor Unit327
- Troubleshooting with the LED on the Outdoor Unit328
- Troubleshooting with the LED on the BP Unit329
Service Check Function330
- RA Indoor Unit Wireless Remote Controller330
- Skyair Indoor Unit INSPECTION/TEST Button333
- Skyair Indoor Unit Wired Remote Controller334
- Skyair Indoor Unit Wireless Remote Controller335
- Sky Air Indoor Unit Error Codes and LED Indication337
- Malfunction Code Indication by Outdoor Unit PCB338
List of Malfunction Code340
Troubleshooting for RA Indoor Unit342
- Indoor Unit PCB Abnormality342
- Freeze-Up Protection Control or High Pressure Control343
- Fan Motor or Related Abnormality345
- Thermistor or Related Abnormality (Indoor Unit)348
- Shutter Drive Motor / Shutter Limit Switch Abnormality349
- Check350
Troubleshooting for Skyair Indoor Unit353
- Indoor Unit PCB Abnormality353
- Malfunction of Drain Water Level System (Float Type)354
- Malfunction of Drain System356
- Indoor Unit Fan Motor Lock357
- Malfunction of Indoor Unit Fan Motor358
- Swing Flap Motor Malfunction / Lock360
- Malfunction of Capacity Setting362
- Malfunction of Heat Exchanger Thermistor (R2T)363
- Malfunction of Heat Exchanger Thermistor (R3T)364
- Malfunction of Suction Air Thermistor365
- Malfunction of Remote Controller Thermistor366
- Transmission Error (between Indoor Unit and Remote Controller)367
- Transmission Error (between Main and Sub Remote Controller)368
- Malfunction of Field Setting Switch369
- 5.15 Check370
Troubleshooting for BP Unit372
- Malfunction of Electronic Expansion Valve372
- Faulty BP Unit PCB373
- Faulty BP Liquid or Gas Pipe Thermistor374
- Transmission Error between Indoor Unit and BP Unit375
- Transmission Error between Outdoor Unit and BP Unit377
- Check378
Troubleshooting for Outdoor Unit379
- Faulty Outdoor Unit PCB379
- Actuation of High Pressure Switch380
- Actuation of Low Pressure Switch381
- Compressor Motor Lock382
- Malfunction of Outdoor Unit Fan Motor383
- Malfunction of Moving Part of Electronic Expansion Valve384
- Abnormal Discharge Pipe Temperature385
- Malfunction of Thermistor for Outdoor Air (R1T)386
- Malfunction of Discharge Pipe Thermistor (R3T)387
- Malfunction of Thermistor (R2T) for Suction Pipe388
- Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger389
- Malfunction of Receiver Gas Pipe Thermistor (R5T)390
- Outdoor Unit: Malfunction of High Pressure Sensor391
- Malfunction of Low Pressure Sensor392
- Malfunction of Inverter Radiating Fin Temperature Rise393
- Inverter Compressor Abnormal394
- Inverter Current Abnormal395
- Inverter Start up Error396
- Malfunction of Transmission between Inverter and Control PCB397
- Malfunction of Inverter Radiating Fin Temperature Rise Sensor399
- Faulty Combination of Inverter and Fan Driver400
- Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure401
- Power Supply Insufficient or Instantaneous Failure402
- 7.24 Check Operation Not Executed404
- Malfunction in Other Indoor Unit or Other BP Unit405
- Mismatching of Indoor Unit, BP Unit and Outdoor Unit406
- Refrigerant System Not Set, Incompatible Wiring/Piping407
- Malfunction of System, Refrigerant System Address Undefined408
Check409
Thermistor Resistance / Temperature Characteristics411
10.Pressure Sensor413
Part 9 Removal Procedure414
Outdoor Unit415
- Removal of Outer Panels415
- Removal of PCB422
- Removal of Solenoid Valve, Four Way Valve and Motorized Valve433
- Removal of Thermistor Assembly434
- Removal of Fan Motor435
BP Unit438
- Removal of PCB438
- Removal of Solenoid Valve Coil441
Part 10 Appendix444
Piping Diagrams445
- Outdoor Units445
- BP Units446
- Indoor Units447
Wiring Diagrams455
- Outdoor Units455
- BP Units458
- Indoor Units460
Index470
Drawings & Flow Charts476

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