SiENBE37-701 R-410A Heat Recovery 50Hz 1. Introduction .................... vi 1.1 Safety Cautions ..................vi 1.2 PREFACE ....................x Part 1 General Information ............1 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 2.2 Outdoor Units ...................4 3.
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SiENBE37-701 2.3 Electronic Expansion Valve PI Control..........114 2.4 Step Control of Outdoor Unit Fans ............114 2.5 Outdoor Unit Fan Control in Cooling Operation ........115 2.6 Heat Exchanger Control ...............116 3. Special Control..................117 3.1 Startup Control ..................117 3.2 Large Capacity Start Up Control (Heating)...........119 3.3 Oil Return Operation ................120 3.4 Defrost Operation .................124 3.5 Pump-down Residual Operation ............126...
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SiENBE37-701 2.5 Remote Control Service Mode .............241 2.6 Test Run Mode..................243 2.7 Remote Control Self-Diagnosis Function ..........243 3. Troubleshooting by Indication on the Remote Control ......250 3.1 “A0” Indoor Unit: Error of External Protection Device ......250 3.2 “A1” Indoor Unit: PC Board Defect............251 3.3 “A3”...
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SiENBE37-701 3.38 “L5” Outdoor Unit: Momentary Overcurrent of Inverter Compressor..308 3.39 “L8” Outdoor Unit: Momentary Overcurrent of Inverter Compressor..310 3.40 “L9” Outdoor Unit: Inverter Compressor Starting Failure ......312 3.41 “LC” Outdoor Unit: Malfunction of Transmission between Inverter and Con- trol PC Board315 3.42 “P1”...
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SiENBE37-701 3. List of Electrical and Functional Parts ..........418 3.1 Outdoor Unit ..................418 3.2 Indoor Side ...................422 4. Option List ...................428 4.1 Option List of Controllers..............428 4.2 Option Lists (Outdoor Unit)..............430 5. Piping Installation Point...............431 5.1 Piping Installation Point ................431 5.2 The Example of a Wrong Pattern ............432 6.
SiENBE37-701 Introduction 1. Introduction Safety Cautions Cautions and ! Be sure to read the following safety cautions before conducting repair work. Warnings ! The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.
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Introduction SiENBE37-701 Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.
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SiENBE37-701 Introduction Warning Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire.
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Introduction SiENBE37-701 Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock. If the installation platform or frame has corroded, replace it.
This is the new service manual for Daikin's Year 2007 VRVIII series Heat Recovery System. Daikin offers a wide range of models to respond to building and office air conditioning needs. We are confident that customers will be able to find the models that best suit their needs.
SiENBE37-701 Part 1 General Information 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance................3 2.1 Indoor Units ....................3 2.2 Outdoor Units ...................4 3. Combination of Outdoor Units..............5 4. Model Selection..................6 General Information...
Model Names of Indoor/Outdoor Units SiENBE37-701 1. Model Names of Indoor/Outdoor Units Indoor Units Power Type Model Name Supply Roundflow Ceiling FXFQ 100P 125P — — Mounted Cassette 600×600 4-Way Blow FXZQ — — — — — — Ceiling Mounted Cassette 2-Way Blow Ceiling FXCQ...
Heat Recovery: BHFP26P90 26HP 28HP 30HP 32HP 34HP 36HP 38HP 40HP Heat Recovery: BHFP26P136 42HP 44HP 46HP 48HP Note: For multiple connection of 18HP system or more, an optional Daikin Outdoor Unit Multi Connection Piping Kit is required. General Information...
Model Selection SiENBE37-701 4. Model Selection VRV III Heat Recovery Series Connectable indoor units number and capacity Normal Series 10HP 12HP 14HP 16HP 18HP 20HP System name REYQ8P REYQ10P REYQ12P REYQ14P REYQ16P REYQ18P REYQ20P Outdoor unit 1 REYQ8P REYQ10P REYQ12P REYQ14P REYQ16P REMQ8P...
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SiENBE37-701 Model Selection Connectable Indoor Unit Power Type Model Name Supply Roundflow Ceiling FXFQ 100P 125P — — Mounted Cassette 600×600 4-Way Blow FXZQ — — — — — — Ceiling Mounted Cassette 2-Way Blow Ceiling FXCQ — 125M — —...
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Model Selection SiENBE37-701 Differences from Conventional Models Differences Item Object New model (P Model) Conventional model (M Model) " NONE Compressor Connection of equalizer oil pipe (No particular changes in " YES terms of service) Equalizer oil pipe for multi- "...
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SiENBE37-701 Part 2 Specifications 1. Specifications ..................10 1.1 Outdoor Units ..................10 1.2 Indoor Units ....................21 1.3 BS Units ....................54 Specifications...
Specifications SiENBE37-701 1. Specifications Outdoor Units Heat Recovery 50Hz <REYQ-P> Model Name REYQ8PY1B REYQ10PY1B kcal / h 19,400 24,300 H1 Cooling Capacity (19.5°CWB) Btu / h 76,800 96,200 22.5 28.2 H2 Cooling Capacity (19.0°CWB) 22.4 28.0 kcal / h 21,500 27,100 H3 Heating Capacity Btu / h...
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SiENBE37-701 Specifications Model Name REYQ12PY1B REYQ14PY1B kcal / h 29,000 35,500 H1 Cooling Capacity (19.5°CWB) Btu / h 115,000 141,000 33.7 41.3 H2 Cooling Capacity (19.0°CWB) 33.5 40.0 kcal / h 32,300 38,700 H3 Heating Capacity Btu / h 128,000 154,000 37.5 45.0...
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Specifications SiENBE37-701 Model Name REYQ16PY1B kcal / h 40,000 H1 Cooling Capacity (19.5°CWB) Btu / h 159,000 46.5 H2 Cooling Capacity (19.0°CWB) 45.0 kcal / h 43,000 H3 Heating Capacity Btu / h 171,000 50.0 Y1 Type Ivory White 5Y7.5/1 Casing Color Y1E Type Light Camel 2.5Y6.5/1.5...
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SiENBE37-701 Specifications Model Name (Combination Unit) REYQ18P7Y1B REYQ20P7Y1B Model Name (Independent Unit) REMQ8P7Y1B+REMQ10P7Y1B REMQ8P7Y1B+REMQ12P7Y1B kcal / h 43,600 48,300 H1 Cooling Capacity (19.5°CWB) Btu / h 173,000 192,000 50.7 56.2 H2 Cooling Capacity (19.0°CWB) 50.4 55.9 kcal / h 48,600 53,800 H3 Heating Capacity Btu / h...
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Specifications SiENBE37-701 Model Name (Combination Unit) REYQ22P7Y1B REYQ24P7Y1B Model Name (Independent Unit) REMQ10P7Y1B+REMQ12P7Y1B REMQ12P7Y1B+REMQ12P7Y1B kcal / h 53,200 58,000 H1 Cooling Capacity (19.5°CWB) Btu / h 211,000 230,000 61.9 67.4 H2 Cooling Capacity (19.0°CWB) 61.5 67.0 kcal / h 59,300 64,500 H3 Heating Capacity Btu / h...
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SiENBE37-701 Specifications Model Name (Combination Unit) REYQ26P7Y1B REYQ28P7Y1B Model Name (Independent Unit) REMQ10P7Y1B+REMQ16P7Y1B REMQ12P7Y1B+REMQ16P7Y1B kcal / h 63,100 67,900 H1 Cooling Capacity (19.5°CWB) Btu / h 250,000 270,000 73.4 79.0 H2 Cooling Capacity (19.0°CWB) 73.0 78.5 kcal / h 70,100 75,300 H3 Heating Capacity Btu / h...
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Specifications SiENBE37-701 Model Name (Combination Unit) REYQ30P7Y1B REYQ32P7Y1B Model Name (Independent Unit) REMQ14P7Y1B+REMQ16P7Y1B REMQ16P7Y1B+REMQ16P7Y1B kcal / h 73,500 77,800 H1 Cooling Capacity (19.5°CWB) Btu / h 292,000 309,000 85.5 90.5 H2 Cooling Capacity (19.0°CWB) 85.0 90.0 kcal / h 81,700 86,000 H3 Heating Capacity Btu / h...
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SiENBE37-701 Specifications Model Name (Combination Unit) REYQ34P7Y1B REYQ36P7Y1B Model Name (Independent Unit) REMQ8P7Y1B+REMQ10P7Y1B+REMQ16P7Y1B REMQ8P7Y1B+REMQ12P7Y1B+REMQ16P7Y1B kcal / h 82,600 87,700 H1 Cooling Capacity (19.5°CWB) Btu / h 328,000 348,000 96.0 H2 Cooling Capacity (19.0°CWB) 95.4 kcal / h 92,000 97,200 H3 Heating Capacity Btu / h 365,000 386,000...
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Specifications SiENBE37-701 Model Name (Combination Unit) REYQ38P7Y1B REYQ40P7Y1B Model Name (Independent Unit) REMQ10P7Y1B+REMQ12P7Y1B+REMQ16P7Y1B REMQ12P7Y1B+REMQ12P7Y1B+REMQ16P7Y1B kcal / h 92,900 97,200 H1 Cooling Capacity (19.5°CWB) Btu / h 368,000 386,000 H2 Cooling Capacity (19.0°CWB) kcal / h 102,000 108,000 H3 Heating Capacity Btu / h 406,000 427,000...
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SiENBE37-701 Specifications Model Name (Combination Unit) REYQ42P7Y1B REYQ44P7Y1B Model Name (Independent Unit) REMQ10P7Y1B+REMQ16P7Y1B+REMQ16P7Y1B REMQ12P7Y1B+REMQ16P7Y1B+REMQ16P7Y1B kcal / h 102,000 108,000 H1 Cooling Capacity (19.5°CWB) Btu / h 406,000 427,000 H2 Cooling Capacity (19.0°CWB) kcal / h 114,000 119,000 H3 Heating Capacity Btu / h 450,000 471,000...
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Specifications SiENBE37-701 Model Name (Combination Unit) REYQ46P7Y1B REYQ48P7Y1B Model Name (Independent Unit) REMQ14P7Y1B+REMQ16P7Y1B+REMQ16P7Y1B REMQ16P7Y1B+REMQ16P7Y1B+REMQ16P7Y1B kcal / h 113,000 117,000 H1 Cooling Capacity (19.5°CWB) Btu / h 447,000 464,000 H2 Cooling Capacity (19.0°CWB) kcal / h 124,000 129,000 H3 Heating Capacity Btu / h 495,000 512,000...
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Specifications SiENBE37-701 Roundflow Ceiling Mounted Cassette 1-1 TECHNICAL SPECIFICATIONS FXFQ20PVEB FXFQ25PVEB FXFQ32PVEB FXFQ40PVEB FXFQ50PVEB Standard Standard Accessories Installation and operation manual Accessories Drain hose Washer for hanging bracket Screws Sealing Pads Insulation for fitting Clamp for drain hose Installation guide Drain sealing pad Notes The sound pressure values are mentioned for a unit installed with rear suction...
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Specifications SiENBE37-701 1-2 ELECTRICAL SPECIFICATIONS FXFQ20PVEB FXFQ25PVEB FXFQ32PVEB FXFQ40PVEB FXFQ50PVEB Power Name Supply Frequency 50/60 Voltage 220-240/220 Current Minimum circuit amps (MCA) Maximum fuse amps (MFA) Full load amps (FLA) Voltage Minimum -10% range Maximum +10% Notes Voltage range : units are suitable for use on electrical systems where voltage supplied to unit terminals is not below or above listed range limits.
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Specifications SiENBE37-701 1-1 TECHNICAL SPECIFICATIONS FXZQ20MV1B FXZQ25MV1B FXZQ32MV1B FXZQ40MV1B FXZQ50MV1B Notes Nominal cooling capacities are based on : indoor temperature : 27°CDB, 19°CWB, outdoor temperature : 35°CDB, equivalent refrigerant piping : 7.5m (horizontal) Nominal heating capacities are based on : indoor temperature : 20°CDB, outdoor temperature : 7°CDB, 6°CWB, equivalent refrigerant piping : 7.5m (horizontal) Capacities are net, including a deduction for cooling (an addition for heating) for indoor fan motor heat.
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Specifications SiENBE37-701 2-Way Blow Ceiling Mounted Cassette 1-1 TECHNICAL SPECIFICATIONS FXCQ20MV3B FXCQ25MV3B FXCQ32MV3B FXCQ40MV3B FXCQ50MV3B Air Filter Resin net with mold resistance Air direction control Up and downwards Refrigerant control Electronic expansion valve Temperature control Microprocessor thermostat for cooling and heating Safety devices PC board fuse Fan motor thermal fuse...
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Specifications SiENBE37-701 1-1 TECHNICAL SPECIFICATIONS FXCQ63MV3B FXCQ80MV3B FXCQ125MV3B Air Filter Resin net with mold resistance Air direction control Up and downwards Refrigerant control Electronic expansion valve Temperature control Microprocessor thermostat for cooling and heating Safety devices PC board fuse Fan motor thermal fuse Fan motor thermal protector Fan motor thermal protector Drain pump fuse...
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SiENBE37-701 Specifications 1-2 ELECTRICAL SPECIFICATIONS FXCQ20MV3B FXCQ25MV3B FXCQ32MV3B FXCQ40MV3B FXCQ50MV3B Power Name Supply Phase Frequency Voltage Current Minimum circuit amps 0.50 0.50 0.50 0.80 0.80 (MCA) Maximum fuse amps 16.00 16.00 16.00 16.00 16.00 (MFA) Full load amps (FLA) 0.40 0.40 0.40 0.60...
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SiENBE37-701 Specifications 1-1 TECHNICAL SPECIFICATIONS FXKQ25MAVE FXKQ32MAVE FXKQ40MAVE FXKQ63MAVE Notes Nominal cooling capacities are based on : indoor temperature : 27°CDB, 19°CWB, outdoor temperature : 35°CDB, equivalent refrigerant piping : 7.5m (horizontal) Nominal heating capacities are based on: indoor temperature : 20°CDB, outdoor temperature : 7°CDB, 6°CWB, equivalent refrigerant piping : 7.5m (horizontal) Capacities are net, including a deduction for cooling (an addition for heating) for indoor fan motor heat.
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SiENBE37-701 Specifications Concealed Ceiling Unit 1-1 TECHNICAL SPECIFICATIONS FXSQ20MV3B FXSQ25MV3B FXSQ32MV3B FXSQ40MV3B FXSQ50MV3B Decoration Model BYBS32DJW1 BYBS32DJW1 BYBS32DJW1 BYBS45DJW1 BYBS45DJW1 Panel Colour White (10Y9/0,5) Dimensions Height Width Depth Weight Drain-up Height Air Filter Resin net with mold resistance Air direction control Up and downwards Refrigerant control Electronic expansion valve...
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SiENBE37-701 Specifications 1-1 TECHNICAL SPECIFICATIONS FXSQ63MV3B FXSQ80MV3B FXSQ100MV3B FXSQ125MV3B Decoration Model BYBS71DJW1 BYBS125DJW1 BYBS125DJW1 BYBS125DJW1 Panel Colour White (10Y9/0,5) Dimensions Height Width 1,100 1,500 1,500 1,500 Depth Weight Drain-up Height Air Filter Resin net with mold resistance Air direction control Up and downwards Refrigerant control Electronic expansion valve...
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Specifications SiENBE37-701 1-2 ELECTRICAL SPECIFICATIONS FXSQ20MV3B FXSQ25MV3B FXSQ32MV3B FXSQ40MV3B FXSQ50MV3B Power Name Supply Phase Frequency Voltage Current Minimum circuit amps 0.50 0.50 0.50 0.60 0.90 (MCA) Maximum fuse amps 16.00 16.00 16.00 16.00 16.00 (MFA) Full load amps (FLA) 0.40 0.40 0.40 0.50...
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SiENBE37-701 Specifications 1-2 ELECTRICAL SPECIFICATIONS FXHQ32MAVE FXHQ63MAVE FXHQ100MAVE Power Name Supply Phase Frequency Voltage 220-240 Current Minimum circuit amps 0.80 0.80 0.90 (MCA) Maximum fuse amps 15.00 15.00 15.00 (MFA) Full load amps (FLA) 0.60 0.60 0.70 Voltage Minimum -10% range Maximum +10%...
Specifications SiENBE37-701 BS Units Model BSVQ100PV1 BSVQ160PV1 BSVQ250PV1 Power Supply 1 Phase 50Hz 200-240V 1 Phase 50Hz 200-240V 1 Phase 50Hz 200-240V Total Capacity Index of Indoor Unit 20 to 100 More than 100 but 160 or less More than 160 but 250 or less No.
Refrigerant Circuit SiENBE37-701 1. Refrigerant Circuit REYQ8P, 10P, 12P No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV) Inverter compressor is operated on frequencies between 52Hz and 210Hz by using the inverter, while Standard compressor is operated with commercial power supply only.
Refrigerant Circuit SiENBE37-701 REYQ14P, 16P No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV1) Inverter compressor is operated on frequencies between 52Hz and 266Hz by using the inverter. The number of operating steps is as follows. REYQ14P or 16P : 26 step Standard compressor 1 (INV2) Since the system is of air heat exchanging type, the fan is operated at 9-step rotation Inverter fan...
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SiENBE37-701 Refrigerant Circuit REYQ14P, 16P (14HP, 16HP Single Type) (INV Unit × 2) Liquid Subcool Heat Exchanger 2 Pipe Left Stop Valve Heat Exchanger 2 Dual Pressure Gas Pipe Stop Valve S2PH INV2 Suction Pipe Stop Valve Subcool Heat Exchanger 1 Right Liquid Pipe Heat Exchanger 1...
Refrigerant Circuit SiENBE37-701 REMQ8PY1 (Multi 8HP) No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 52Hz and 210Hz by using Inverter compressor (INV) the inverter. Compressor operation steps : Refer to page 110~113. Since the system is of air heat exchanging type, the fan is operated at 9-step rotation Inverter fan speed by using the inverter.
Refrigerant Circuit SiENBE37-701 REMQ10PY1, 12PY1 (Multi 10, 12HP) No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV) Inverter compressor is operated on frequencies between 52Hz and 210Hz by using the inverter, while Standard compressor is operated with commercial power supply only.
Refrigerant Circuit SiENBE37-701 REMQ14PY1, 16PY1 (Multi 14, 16HP) No. in refrigerant Symbol Name Major Function system diagram Inverter compressor (INV) Inverter compressor is operated on frequencies between 52Hz and 210Hz by using the inverter, while Standard compressor is operated with commercial power supply only. The number of Standard compressor 1 (STD1) operating steps is as follows when Inverter compressor is operated in combination with Standard compressor.
Refrigerant Circuit SiENBE37-701 BS Unit Functional Parts BSVQ100,160,250PV1 Name Symbol Function Electronic expansion valve (EVH) Opens while in heating operation or all indoor units are in cooling operation. (Max : 760pls) Electronic expansion valve (EVL) Opens while in cooling operation. (Max : 760pls) Electronic expansion valve (EVHS) Opens while in heating operation or all indoor units are in cooling operation.
SiENBE37-701 Refrigerant Circuit Indoor Units FXCQ, FXFQ, FXZQ, FXKQ, FXDQ, FXDYQ, FXSQ, FXMQ, FXHQ, FXAQ, FXLQ, FXNQ Gas-side Piping Liquid-side Piping Electronic Filter Expansion Valve Filter Name Symbol Function Used to control superheated degree of gas when Electronic cooling and subcooled degree when heating. (Max. expansion valve 2000 pls) Suction air...
Refrigerant Flow for Each Operation Mode SiENBE37-701 Cooling Oil Return Operation Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Heating Oil Return Operation Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Oil Return Operation at Simultaneous Cooling / Heating Operation Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Partial Defrosting 1 (Defrosting in the Right Unit) Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Partial Defrosting 2 (Defrosting in the Left Unit) Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode REYQ14P, 16P Cooling Operation Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Heating Operation Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Simultaneous Cooling / Heating Operation Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Cooling Oil Return Operation Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Heating Oil Return Operation Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Oil Return Operation at Simultaneous Cooling / Heating Operation Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Partial Defrosting 1 (Defrosting in the Right Unit) Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Partial Defrosting 2 (Defrosting in the Left Unit) Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode REYQ18P, 20P Cooling Operation Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Heating Operation Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Simultaneous Cooling / Heating Operation Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Cooling Oil Return Operation Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Heating Oil Return Operation Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Oil Return Operation at Simultaneous Cooling / Heating Operation Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Partial Defrosting 1 (Defrosting in the Right Unit) Refrigerant Circuit...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Partial Defrosting 2 (Defrosting in the Left Unit) Refrigerant Circuit...
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SiENBE37-701 Refrigerant Flow for Each Operation Mode Operation of refrigerant regulator 1. Recovery of refrigerant Surplus refrigerant is recovered to refrigerant regulator by opening of SVL and SVG when the indoor unit load is small. Liquid Pipe Right Pressure regulating valve 20SA S1NPH Equalizing...
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Pressure equalizing when switching operation cooling/ heating 1. When switching operation from to cooling to heating First, the electric expansion valves for EVHS, EVH, EVL and EVLS of the indoor unit will be closed.
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SiENBE37-701 Refrigerant Flow for Each Operation Mode 2. When switching operation from heating to cooling First, the electric expansion valve and the solenoid valve for EVHS, EVH, EVL and EVLS of the indoor unit will be closed. Next, open the EVLS, and it makes to balance the system pressure. Finally, EVL and EVLS are opened and the electric expansion valve of the indoor unit is opened to start the operation as a cooling circuit.
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Refrigerant Flow for Each Operation Mode SiENBE37-701 Refrigerant Circuit...
SiENBE37-701 Part 4 Function 1. Function General.................102 1.1 Symbol ....................102 1.2 Operation Mode..................104 2. Basic Control..................105 2.1 Normal Operation .................105 2.2 Compressor PI Control.................106 2.3 Electronic Expansion Valve PI Control..........114 2.4 Step Control of Outdoor Unit Fans ............114 2.5 Outdoor Unit Fan Control in Cooling Operation ........115 2.6 Heat Exchanger Control ...............116 3.
Function General SiENBE37-701 1. Function General Symbol Electric symbol Symbol Description or function REYQ8~16P REMQ8~16P (Heat exchanger1) 20SA Four way valve (Heat exchanger switch) (Heat exchanger2) 20SB Four way valve (High/low pressure gas pipe switch) – – Discharge pipe superheated degree DSHi –...
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SiENBE37-701 Function General Electric symbol Symbol Description or function REYQ8~16P REMQ8~16P R1T (A1P) R1T (A1P) Outdoor air temperature R8T (Suction pipe1) Suction pipe temperature R10T (Suction pipe2) (Deicer1) Heat exchanger outlet temperature at cooling R12T (Deicer2) (Gas pipe1) Heat exchanger gas pipe temperature R11T (Gas pipe2) (Liquid pipe1)
Function General SiENBE37-701 Operation Mode Thermostat ON Operation in stop mode Indoor unit stop or thermostat Operation Pressure egualization mode prior to startup changeover Restart standby Thermostat ON Malfunction/ Rotation Standby Malfunction/ Stanby Indoor unit stop or thermostat OFF Pump-down Heating Cooling Thermostat ON...
SiENBE37-701 Basic Control 2. Basic Control Normal Operation 2.1.1 List of Functions in Normal Operation (Electric Function of Functional Part Symbol) Part Name Symbol Normal Simultaneous Normal Cooling Normal Heating REYQ REMQ Cooling / Heating M1C M1C PI control, High PI control, High PI control, High Compressor 1...
Basic Control SiENBE37-701 Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] Controls compressor capacity to adjust Te to Te : Low pressure equivalent saturation achieve target value (TeS).
SiENBE37-701 Basic Control ! Operating Priority and Rotation of Compressors Each compressor operates in the following order of priority.In the case of multi-outdoor-unit system, each compressor operates in any of Pattern 1through Pattern 3 INV:Inverter compressor according to the rotation of outdoor units. STD1:Standard compressor 1 STD2:Standard compressor 2 Pattern 1...
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