Daikin VRV Inverter K Series

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Flow of Refrigerant in Each Operating Mode SiE-05C

268 Functions PLUS Series

5.2.4 Refrigerant Pump Down Operation

Function unit

BC3K

Constant speed outdoor unit 1

RN10K

Constant speed outdoor unit 2

RN10K

Inverter outdoor unit

RX10K

(VE027)

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Main Page

Safety Cautions9
Inspection after Repair11
Using Icons12
Using Icons List12
Preface13
General Information15
Series Introduction16
Nomenclature16
Outdoor Unit17
Indoor/Outdoor Unit Combinations18
Outline of System19
Easily Recognizable Features of the "K" Series19
VRV System Inverter K Series System Outline19
Changes in K Series Functions / Parts20
Changes in the System as a Whole20
Transmission between Outdoor Units21
VRV System Inverter K Series21
Changes in Indoor Units22
Changes in Outdoor Units22
Compatibility of Old and New VRV System Inverter23
Functions Inverter K Series25
Functions26
Outdoor Unit Refrigerant System Diagram26
Function of Thermistors and Pressure Sensors40
List of Safety Devices and Functinal Parts Setting Values41
Safety for Restart42
Restart Safety Timer42
Soft Start42
Pump down Start43
Heating Lay-Up Start43
Equalized Oil Level Operation44
Oil Return Operation45
Compressor Operation Frequency45
Opening of the Electronic Expansion Valve45
Fan and Solenoid Valve45
Defrost46
Heating Pump down Residual Operation47
High Pressure (Hp) Control49
Low Pressure (Lp) Control49
Discharge Pipe Temperature (Td) Control49
Inverter Current Control50
Discharge Super Heating (DSH) Control50
Control According to Outdoor Temperature50
Control During Low Outdoor Air Temperature Cooling51
Low Outdoor Air Cooling in Conditions51
Low Noise Control53
Demand Control54
Compressor Capacity Control55
Te / Tc Setting57
Gas Depletion Alarm58
When Cooling58
When Heating58
Drain Pump Control59
When the Float Switch Is Tripped During Heating Operation60
Oil Temperature Sensor61
Prevention of Wetness During Heating61
Prevention of Oil Dilution During Defrost61
Louver Control for Preventing Ceiling Dirt62
Thermostat Sensor in Remote Controller63
Freeze Prevention65
Test Operation Inverter K Series67
When Power Is Turned on68
When Turning Power on the First Time68
When Turning Power on after the First Time68
Outdoor Unit PC Board Ass’y69
Setting Modes71
Mode Changing Procedure71
Setting Items73
Monitor Mode75
Monitor Mode Data76
Sequential Start77
Power Supply Wiring77
Wiring77
External Control Adaptor for Outdoor Unit78
System Examples79
Switch Settings on the Adaptor PCB79
Outdoor Unit PCB Settings80
Cool / Heat Mode Selection81
Low Noise / Demand Operation86
Demand / Low Noise Input87
Input Signal87
Wiring Check Operation88
Indoor Unit PCB Ass’y89
Remote Controllers (Wired and Wireless)90
Applicable Remote Controller Models (Wired Type)91
Applicable Wireless Remote Controller Models93
Control by Remote Controller95
Indoor Field Setting97
Wired Remote Controller97
Wireless Remote Controller97
Setting Contents and Code No.98
Centralized Control Group No. Setting99
Setting of Master Remote Controller101
Remote Controller Self-Diagnosis Function103
Remote Controller Service Mode107
Model Change of Centralized Control Devices109
When Using Model a Centralized Control Device110
When Using Model B Centralized Control Device111
Central Remote Controller (DCS302A51 / DCS302B61)112
System Configuration112
Central Remote Controller Part Names and Functions114
Control Wiring115
Wiring Outline115
Contents of Control Modes117
Unified ON/OFF Controller119
Wiring for Transmission120
Schedule Timer (DST301A51 / DST301B61)122
System Configuration and Electrical Wiring122
Schedule Timer Part Names and Functions124
Combining Different Types of Centralized Control Devices126
Example of DCS302A51 / DCS301A51/ DST301A51 Systems126
Connection for Optional Controller for Centralized Control127
Electric Wiring128
Operation Flowcharts133
Indoor Unit Operation Flowchart133
Outdoor Unit Operation Flowchart138
Diagnosis by Malfunction Code142
Failure Diagnosis143
Inverter Failure Diagnosis143
Failure Diagnosis for Optional Controllers for Centralized Control143
Troubleshooting144
Indoor Unit: Error of External Protection Device144
Indoor Unit: PC Board Defect145
Indoor Unit: Malfunction of Drain Level Control System (33H)146
Indoor Unit: Fan Motor (M1F) Lock, Overload147
Indoor Unit: Malfunction of Swing Flap Motor (M1S)148
Indoor Unit: Drain Level above Limit150
Indoor Unit: Malfunction of Capacity Determination Device150
Indoor Unit: Malfunction of Thermistor (R2T) for Liquid Pipe151
Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes151
Indoor Unit: Malfunction of Thermistor (R1T) for Air Inlet152
Indoor Unit: Malfunction of Thermostat Sensor in Remote Controller152
Outdoor Unit: Actuation of Safety Device153
Outdoor Unit: PC Board Defect153
Outdoor Unit: Actuation of High Pressure Switch154
Outdoor Unit: Actuation of Low Pressure Switch155
Outdoor Unit: Abnormal Discharge Pipe Temperature157
Outdoor Unit: Malfunction of Thermistor for Outdoor Air (R1T)158
Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T158
Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe159
Outdoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger159
Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor160
Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor161
Outdoor Unit: Malfunction of Oil Temperature Thermistor (R5T)162
Negative Phase, Open Phase164
Malfunction of Transmission between Indoor Units165
Malfunction of Transmission between Remote Controller and Indoor Unit166
Malfunction of Transmission between Outdoor Units167
Excessive Number of Indoor Units170
Address Duplication of Central Remote Controller170
Refrigerant System Not Set, Incompatible Wiring/Piping171
Malfunction of System, Refrigerant System Address Undefined172
Failure Diagnosis for Inverter System173
How to Use the Monitor Switch on the Inverter PC Board174
Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise175
Outdoor Unit: Inverter Instantaneous Over-Current176
Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload177
Outdoor Unit: Inverter Stall Prevention, Compressor Lock178
Power Supply Insufficient or Instantaneous Failure180
Outdoor Unit: Inverter Over-Ripple Protection182
PC Board Defect184
Improper Combination of Optional Controllers for Centralized Control185
Address Duplication, Improper Setting186
Operation Lamp Blinks191
Display “Under Host Computer Integrate Control” Blinks192
Precautions When Replacing K Series PC Boards195
Typical Wiring Mistakes196
General Information PLUS Series203
Features of the VRV PLUS Series204
Improved Piping System204
Dramatic Reduction of Wiring Saves Time and Labor When Installing208
Less Wiring208
System Outline209
Heat Pump and Cooling Only System209
Heat Recovery System210
Indoor / Outdoor Unit Combinations211
Heat Pump System211
Functions PLUS Series213
Outdoor Unit Refrigerant System Diagrams214
List of Safety Devices and Functional Parts Setting Values233
Outline of Control234
Starting Control234
Cooling Start Following Layup235
Heating Pump down Start (for Heat Pump System)236
Heating Power on Start (for Heat Pump System)236
Heating Start Following Layup (for Heat Pump System)237
Pressure Equalizing Control before Starting238
Oil Return Control239
Conditions for Executing Oil Control239
Defrost (for Heat Pump System)241
Conditions for Executing Defrost241
Oil Equalization Control242
Heating Pump down Residual Operation (for Heat Pump System)246
Conditions for Pump down Residual Operation246
Compressor Oil Temperature Protection Control247
Low Pressure Protection Control Step248
Low Pressure Protection Control248
Low Pressure Protection Control (in Case of Cooling Only System)249
High Pressure Control Step250
Discharge Temperature Protection Control251
Both Inverter and Standard Outdoor Units251
Cooling Overload Control252
Inverter Protection Control252
Standby by Outdoor Temperature When Heating252
Low Outdoor Temperature Control When Cooling253
Backup Operation257
Emergency Operation258
Pump down Operation262
In Case of Cooling Only System263
Flow of Refrigerant in each Operating Mode265
Normal Cooling266
Normal Heating267
Oil Return268
Operation When Power Is Turned on288
When Turning on Power for First Time288
When Turning on Power the Second Time and Subsequent288
Switch Settings According to Number of Outdoor Units291
Functions of Pushbutton Switches292
Mode Change292
External Control Adaptor for Outdoor Units301
Demand / Low Noise Control (Except for Cooling Only System)302
Cool/Heat Mode Switching304
Set Cool/Heat Separately for each Outdoor System by C/H SELECTOR305
Troubleshooting for VRV PLUS Series313
Actuation of Fin Thermal337
Defect of Compressor Coil338
Compressor Overload339
Defect of Compressor340
Power Supply Insufficient342
Special Service Mode345
Backup and Emergency Operation346
Wiring Diagrams - Outdoor Unit355
Inverter K Series - Heat Pump357
2-Way Blow Ceiling Mounted Cassette365
Wall Mounted Unit375
Floor Standing Unit376
Concealed Floor Standing Unit377
Characteristics378
Thermistor Resistance / Temperature Characteristics378
Pressure Sensor Voltage Output / Detected Pressure Characteristics380
Method of Replacing the Inverter's Power Transistors and Diode Modules381
Method of Replacing the Inverter's Power Transistors and381
Diode Module382
Wiring Adaptor383
Wiring to Outside (Host Computer Monitor Panel, Etc.)385
Wiring Adaptor for Group Electrical Appendices388
Part Names and Functions388
Wiring to Outside388
Applicable Models and Whether Mounting Box Is Required or Not390
Adaptor for Wiring391
Operation Display Fetch392
Interface Adaptor for Skyair Series (DTA102A52)393
Interface Adaptor for SKY AIR Series394
Wiring Adaptor for Other Air Conditioners (DTA103A51)395
Unification Adaptor for Computerized Control401
Control Input (Unified ON/OFF Control)402
Control Mode Switch (RS) Setting403
Index405
Drawings & Flow Charts409

Daikin VRV Inverter K Series - Page 282

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