Daikin GYEQ20AN Service Manual Download

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Heat Recovery R-410A 50 Hz

GYEQ20/30AN

SiAUY361411EA

Service
Manual

Gas Heat Pump

Air Conditioner

Summary of Contents for GYEQ20AN

Page 1: ...Heat Recovery R 410A 50 Hz GYEQ20 30AN SiAUY361411EA Service Manual Gas Heat Pump Air Conditioner...

Page 2: ...atment Equipment 5 3 Capacity Range 6 3 1 Combination Ratio 6 3 2 Indoor Unit Connection Capacity 6 3 3 Heat Recovery Operation 6 Part 2 Device Overview 7 1 Model Naming 8 2 Unit Specifications 9 3 Ex...

Page 3: ...ontrol 108 Part 4 Troubleshooting 109 1 Troubleshooting the Outdoor Unit 110 1 1 Error Codes 110 1 2 How to Use the Checker on PCB 113 1 3 RUN Mode 115 1 4 STOP Mode 121 1 5 Main Operations in Servici...

Page 4: ...il 197 1 33 Inspecting the Refrigerant System Sensors 198 1 34 Inspecting the Outdoor Unit s Circuit Boards and Power Supply System 200 1 35 Inspecting the Communication Cables 200 1 36 Inspecting the...

Page 5: ...r you have completed the tasks Warning Indicates that there is a possibility that a fatal accident or serious injury may result from failure to take sufficient safety precautions Caution Provides inst...

Page 6: ...h temperatures associated with a fan heater stove burner or the like When working in high places be sure to use a helmet and or lifeline in case you topple or fall otherwise you could face a greater r...

Page 7: ...all it on a surface that can bear its weight Never install the unit either on a surface that cannot bear the product s weight and vibration during operation or in an unstable way otherwise the unit ma...

Page 8: ...k Replace the installation base and mounting frames if they are found deteriorated due to corrosion or some other reason Otherwise the unit may fall possibly resulting in an injury Never fill any refr...

Page 9: ...ng label High voltage Warning label High temperature Don t touch the high temperature part Caution label Stepping on parts Warning label Rotating parts Don t touch the rotor Caution plate Outdoor unit...

Page 10: ...labels is the same Although the actual appearance is slightly different to the figure above the location of the safety labels is the same 1 2 3 4 1 2 3 3 4 Outside of outdoor unit Indicated location...

Page 11: ...or unit GYEQ20AN GYEQ30AN 040165 00EN00 G F H Detail G K L Detail F Detail H Detail K Detail L 3 5 3 1 5 3 1 2 locations Front view Rear view Front view Rear view F G H K L Detail F Detail G Detail K...

Page 12: ...nits 2 1 2 Outdoor Units 3 1 3 BS Units 3 1 4 Air Treatment Equipment 3 2 External Appearance 4 2 1 Indoor Units 4 2 2 Outdoor Units 5 2 3 BS Units 5 2 4 Air Treatment Equipment 5 3 Capacity Range 6 3...

Page 13: ...ssette Compact Multi Flow Type FXZQ 20M 25M 32M 40M 50M Ceiling Mounted Cassette Double Flow Type FXCQ 20M 25M 32M 40M 50M 63M 80M 125M VE Ceiling Mounted Cassette Corner Type FXKQ 25MA 32MA 40MA 63MA...

Page 14: ...ex Heat Recovery GYEQ20AN 56 0 500 GYEQ30AN 85 0 750 Capacity Index Refrigerant branch kit to refrigerant branch kit Refrigerant branch kit to refrigerant branch kit Less than 7 0 kW less than 62 7 0...

Page 15: ...e FXFQ P Ceiling mounted duct type FXMQ P Ceiling mounted cassette Compact multi flow type FXZQ M Ceiling mounted duct type FXMQ MA Ceiling mounted cassette Double flow type FXCQ M Ceiling suspended t...

Page 16: ...External Appearance SiAUY361411EA 5 General Information 2 2 Outdoor Units 2 3 BS Units 2 4 Air Treatment Equipment GYEQ20AN GYEQ30AN BSGQ P Heat Reclaim Ventilator VAM series VAM GJ...

Page 17: ...1 Total capacity index of connectable indoor units 20 to 100 More than 100 but 160 or less More than 160 but 250 or less No of connectable indoor units Max 5 Max 8 Max 8 BS unit By adding suction gas...

Page 18: ...s 12 5 System Diagrams 14 5 1 Refrigerant System Diagrams 14 5 2 Cooling Water Intake Air Fuel and Engine Oil System Diagram 23 6 Sensor Mounting Positions 25 6 1 Sensors Installed on the Engine 25 6...

Page 19: ...EA Model Naming Device Overview 8 1 Model Naming 30 GYEQ AN Indicates Major Design Category Capacity indication Conversion to kW 20 56 0 kW 30 85 0 kW Series Type GYEQ Gas Heat Pump Air Conditioner He...

Page 20: ...Number of Units 2 3 Motor Output W 370 2 370 3 Airflow Rate m3 min 380 570 Drive Direct drive Direct drive Piping Refrigerant Liquid mm 15 9 19 1 Suction mm 28 6 31 8 Discharge mm 22 2 28 6 Fuel Gas...

Page 21: ...SiAUY361411EA External Diagrams Device Overview 10 3 External Diagrams GYEQ20AN 3PA003981A Unit mm...

Page 22: ...External Diagrams SiAUY361411EA 11 Device Overview GYEQ30AN 3PA003980A Unit mm...

Page 23: ...r Fuel gas connector Gas solenoid valves Regulator Deodorizing catalyst Exhaust gas cooler Solenoid valve SV31 Solenoid valve SV37 Solenoid valve SV3F Solenoid valve SV3E Solenoid valve SV7 Heat excha...

Page 24: ...op valve discharge gas side Stop valve intake gas side Stop valve liquid side Solenoid valve SV37 Solenoid valve SV31 Solenoid valve SV3E Solenoid valve SV3F Solenoid valve SV7 Heat exchanger B Heat e...

Page 25: ...or air of evaporation heat by changing the refrigerant from liquid to gas The indoor air is cooled through this evaporation heat deprivation process Finally gasified refrigerant enters into the outdoo...

Page 26: ...changer F Outdoor heat exchanger B Outdoor fan Indoor unit Oil separator Compressor 1 Compressor 2 Indoor unit BS unit BS unit Intake gas Discharge gas Liquid PL Solenoid valves Electronicexpansionval...

Page 27: ...nt from liquid to gas The indoor air is cooled through this evaporation heat deprivation process The refrigerant that has passed through the indoor heat exchanger on the cooling side is fed to the out...

Page 28: ...F Outdoor heat exchanger B Outdoor fan Heating indoor unit Cooling indoor unit Oil separator Compressor 1 Compressor 2 BS unit BS unit Intake gas Discharge gas Liquid PL Solenoid valves Electronicexpa...

Page 29: ...n heat deprivation process Also the refrigerant that has passed through the waste heat recovery device completely evaporates and deprives the gas engine cooling water hot water of heat The refrigerant...

Page 30: ...changer F Outdoor heat exchanger B Outdoor fan Indoor unit Indoor unit Oil separator Compressor 1 Compressor 2 BS unit BS unit Intake gas Discharge gas Liquid PL Solenoid valves Electronicexpansionval...

Page 31: ...ssed through outdoor heat exchanger F B is fed to the waste heat recovery device which in turn completely evaporates the refrigerant by mixing it with high temperature high pressure refrigerant and th...

Page 32: ...recovery device where it completely evaporates and deprives the gas engine cooling water hot water of heat before returning to the compressor The engine s waste heat is used as the heat source for he...

Page 33: ...Outdoor fan Indoor unit Indoor unit Oil separator Compressor 1 Compressor 2 BS unit BS unit Intake gas Discharge gas Liquid PL Solenoid valves Electronicexpansionvalve Discharge temperature Intake tem...

Page 34: ...r operated valve Waste heat recovery device Filament cap Thermostat 60 C Filter Reservoir tank Cooling water pump Filter Engine Exhaust gas cooler G 6203J A821 0 E All in one unit Intake duct Hose Int...

Page 35: ...w 24 Fuel system diagram Engine oil supply system diagram Mixer Fuel hose Regulator Enhanced fuel hose Valve Double gas solenoid valve Outdoor unit Engine G 62034 A831 0 E Filter port Subtank Hose LO...

Page 36: ...ng positions 3GPH88 GYEQ20AN Engine sensor mounting positions 4GPH88 GYEQ30AN Pulsar for crank shaft rotation Lubricating oil pressure switch Water temperature sensor Pulsar for cam shaft rotation 040...

Page 37: ...eiver temperature 31 sensor High pressure sensor 1 Intake temperature 1 sensor High pressure sensor 4 Waste heat recovery device Accumulator Intake gas Discharge gas Liquid Receiver Oil cooler Outdoor...

Page 38: ...Electrical Wiring Diagrams SiAUY361411EA 27 Device Overview 7 Electrical Wiring Diagrams GYEQ20AN GYEQ30AN 046640 00EN00...

Page 39: ...rigerant piping 23 z Piping work for outdoor unit exhaust drain and condensed water drain pipes 25 z Fuel gas pipe 26 z Recharging refrigerant 26 z Checklist for the completion of work 28 Table of Con...

Page 40: ...erference Install indoor and outdoor units and lay wiring at a safe distance f r o m T V s r a d i o s a u d i o equipment and PCs Refer to the figure on the right Maintain a distance of 3 m or more f...

Page 41: ...1 pc 1 pc 12 pc 16 pc 1 pc 3 pc GYEQ30AN 3 pc 1 pc 1 pc 1 pc 12 pc 16 pc 1 pc 3 pc Model External filter for gas pipe External filter for fluid pipe External filter flange for gas pipe External filte...

Page 42: ...to corrode or cause foreign substances to adhere to the air to heat exchanger and or noticeably soil the unit exterior z Do not install the outdoor unit in a location where there are street lights or...

Page 43: ...ard tower or soundproofing wall around the outdoor unit z Install the outdoor unit in a location where piping work can be performed using a refrigerant piping length and height difference that conform...

Page 44: ...se consult us 5 At the time of actual installation decide on the installation space in consideration of short circuit 6 Maintain the isolated distance regulated by a fireproof evaluation label from th...

Page 45: ...lter may need to be replaced refer to the figure below and make sure that there is sufficient servicing space for the replacement External filter for gas pipe Top face 50 or more 50 or more 200 or mor...

Page 46: ...residential areas where noise and vibration can be a problem use a vibration proof stand Select the vibration proof grade and specification depending on the purpose and environment of the direct room...

Page 47: ...rain ditch When providing the foundation on the ground When providing the foundation on the concrete floor 100 50 50 50 Floor C C Drain ditch Sectional view 022596 00E00 Example of the elevated pad in...

Page 48: ...ing between the outdoor unit and refrigerant branch kit The size of the pipes used should match the outdoor unit s pipe size When you use long pipes with an equivalent length of 90 m or greater you ca...

Page 49: ...door unit s pipe size Suction gas pipe Discharge gas pipe Fluid pipe Refrigerant branch kit to refrigerant branch kit Refrigerant branch kit to refrigerant branch kit Total capacity of indoor units co...

Page 50: ...NET Joint part number GYEQ20AN KHRP25A72T GYEQ30AN KHRP25A73T Between the second branch and BS unit downstream of BS unit Total capacity of indoor units connected downstream Total capacity Between the...

Page 51: ...QJWK 3 after the first branch 2 Actual length Equivalent length Height difference between outdoor and indoor units Height difference between indoor units H2 170 m or less 200 m or less 50 m or less 15...

Page 52: ...bag Rainwater gets inside the piping 022615 00E No good Good z Fit flare nuts on pipe ends before expanding the pipes To connect each flare nut follow these steps 1 Lubricate the outer circumference o...

Page 53: ...During installation or repair do not use fire if the air contains refrigerant gas z After the braze welding wipe off flux with a damp cloth or similar z Avoid the use of a reverse right angled expans...

Page 54: ...tighten them diagonally Tightening torque 49 5 0 N m z Tightening torque for fluid pipe flare is 61 8 75 4 N m z Be careful of the direction of the external filter for the gas pipe indoor unit side o...

Page 55: ...ET Headers Gas side branching pipe Fluid side branching pipe 022622 00E Local pipe Local pipe Local pipe Local pipe To outdoor unit To outdoor unit To indoor unit To indoor unit Gas side branching pip...

Page 56: ...e to prevent gas leaks Apply refrigerating machine oil to both end faces of the packing Discharge gas side 026746 03EN00 Flare nut tightening torque M6 hexagon socket head cap screw 11 1 Unit N m GYEQ...

Page 57: ...ant handling methods z Terms and definitions RCL Refrigerant concentration limit in an enclosed space The acceptable concentration of refrigerant which is the maximum concentration of refrigerant in t...

Page 58: ...Installation Work Manual SiAUY361411EA 47 Device Overview 0FGHP EN0801 DGJ002...

Page 59: ...ow to For locations where people cannot evacuate by themselves e g hospitals and where ventilation by opening the doors is not possible the alarm device cannot be used as the only means of warning NO...

Page 60: ...Installation Work Manual SiAUY361411EA 49 Device Overview 0FGHP EN0801 DGJ002...

Page 61: ...ind the heat insulators too tightly or they will be compressed resulting in poor heat insulation z When binding the indoor unit crossover cables together with a refrigerant pipe lay the cables along t...

Page 62: ...roblems are found in the air tightness test close valve D of the nitrogen gas cylinder close valves A B and C of the manifold gauge and then remove the nitrogen gas side hose joint E z Open valves A B...

Page 63: ...ting the piping to 0 101 MPa or less leave it for one hour If the gauge reading is retained for one hour then the vacuum retention test is successful If the gauge reading has risen chances are that th...

Page 64: ...g end z When it is unavoidable to collectively install the drain pipes of two or more units make sure that they are not exposed to exhaust pressure If collectively installed pipes are exposed to exhau...

Page 65: ...switch has to be mounted in the safety loop z Installation must comply to local and national standards or legislation Recharging refrigerant Amount of recharged refrigerant z The amount of recharged...

Page 66: ...o wait for six hours after turning on the power for the outdoor unit Additional Refrigerant Charging Mode When the Additional Refrigerant Charging Mode is used both the indoor and outdoor units should...

Page 67: ...r unit White pipes chrome plated steel pipes are used for the fuel gas piping The outdoor unit when installed on a vibration proof stand shakes a lot at start up The reinforced gas hose is laid out ca...

Page 68: ...refer to the attached Installation and Piping Work and Test Run Manuals for important additional information Also refer to the Work Manuals for indoor units Two types of precautions are provided in t...

Page 69: ...provided inside the unit so that the wiring does not touch the following parts 1 Moving parts and parts that generate high temperatures e g engine motor 2 Refrigerant circuit e g refrigerant piping s...

Page 70: ...or units Unless a central control system is used the addresses of the respective units are automatically configured and thus you do not have to manually configure them z The link communication and rem...

Page 71: ...ounded z Power must be supplied via a dedicated branch circuit z For indoor unit power supply wiring you cannot connect two different diameter cables to the power supply terminal block Should such two...

Page 72: ...ation however that regulation takes precedence z As far as practicable avoid laying a link communication remote control cable parallel to another link communication remote control cable If that is una...

Page 73: ...roller or centralized cooling heating remote controller optional F 1 F 2 Indoor unit F 1 F 2 Indoor unit F 1 F 2 Indoor unit F 1 F 2 Indoor unit F 1 F 2 Indoor unit Remote controller on hand Remote co...

Page 74: ...due to electricity remaining in the circuit Configuring the DIP switches on the main circuit board z Use the following tables to check configure the DIP switches Name SW No Parameter Description Fact...

Page 75: ...to 0 off off on Sets the centralized cooling heating terminal address to 1 off on off Sets the centralized cooling heating terminal address to 2 off on on Sets the centralized cooling heating termina...

Page 76: ...ly depending on the model 022670 00E Configuring the switches on the BS unit z You have to configure these switches when you use a heating cooling switching remote controller or centralized cooling he...

Page 77: ...isolating switch with fuse or wiring circuit breaker with the appropriate capacity is used Use specified cables wire type thickness for electrical work The cables should be perfectly connected to the...

Page 78: ...Please be sure to refer to the attached Installation and Piping Work and Electrical Work Manuals for important additional information Also refer to the Work Manuals for indoor units The test run must...

Page 79: ...ialists may result in malfunctions or electric shocks z This machine is designed and manufactured especially for the R410A refrigerant If a different type of refrigerant other than the R410A refrigera...

Page 80: ...g the outdoor and indoor units z Check that the combination of the outdoor units and indoor units is correct Possible combinations The following table shows the possible combinations with indoor units...

Page 81: ...ly with a LED lit may fail due to electricity remaining in the circuit Configuring the DIP switches on the main circuit board z Use the following tables to check configure the DIP switches Name SW No...

Page 82: ...off off on Sets the centralized cooling heating terminal address to 1 off on off Sets the centralized cooling heating terminal address to 2 off on on Sets the centralized cooling heating terminal add...

Page 83: ...ly depending on the model 022670 00E Configuring the switches on the BS unit z You have to configure these switches when you use a heating cooling switching remote controller or centralized cooling he...

Page 84: ...he Refrigerant Misfilling Emergency Mode Refer to the next page 11 The test run should start with the cooling operation then change to the heating operation 12 The test run should be implemented durin...

Page 85: ...ormal completion the engine stops and LED5 green on the PCB flashes three times In the case of abnormal completion the engine stops and LED5 green on the PCB is continuously lit In the case of abnorma...

Page 86: ...one second intervals DPSOH RI KRXU PHWHU GLVSOD 1 When operating for 8238 hours 2 When malfunction code E1 occurs 022711 00E z When the total operated hours are displayed Holding down the UP button f...

Page 87: ...ator operation status 1 Actuator operation status 1 display 03 Actuator operation status 2 Actuator operation status 2 display 04 Unused 05 Unused 2 Special operation Special operation mode Special op...

Page 88: ...V6 Pulse 49 SHD2 C 13 Water Motor Valve Pulse 50 SHO1 C 14 Fan 1 min 1 51 SHO2 C 15 Fan 2 min 1 52 Vacant 16 Fan 3 min 1 53 High pressure converted temperature 1 C 17 Cooling water pump min 1 54 Vacan...

Page 89: ...atus is displayed 7DEOH LVW RI DFWXDWRU RSHUDWLRQ VWDWXV 6HOHFW DW HYHO CH No Content CH No Content 01 1 High pressure SW1 SW2 04 1 Vacant 2 Vacant 2 Vacant 3 Vacant 3 Vacant 4 Vacant 4 Vacant 5 Vacan...

Page 90: ...5 Vacant 5 Vacant 6 Vacant 6 Vacant 7 SV7 7 Vacant 8 Vacant 8 Vacant 03 1 SV13 08 1 Vacant 2 Vacant 2 Vacant 3 Vacant 3 Vacant 4 SV12 4 Vacant 5 SV9 5 Vacant 6 Vacant 6 Vacant 7 Vacant 7 Vacant 8 Vaca...

Page 91: ...e 1 ON OFF 12 13 Vacant 14 Refrigerant Additional Filling Mode Note 1 ON OFF 15 16 Vacant Note 1 Power reset is required after the operation is terminated OFF 3 Indoor unit 3 1 Indoor Unit Information...

Page 92: ...ove figure When an indoor unit is in the thermostat ON state the corresponding segment lights 3 3 Indoor Unit Remote Controller ON Display 1 Enter RUN mode select CH 3 at level 1 and press NEXT 2 Sele...

Page 93: ...OFF disabled factory default OFF 6 Energy saving heating mode ON enabled OFF disabled factory default OFF 09 0 Defrosting OFF Normal defrosting factory default ON Strong defrosting stop defrosting OFF...

Page 94: ...t one actuator at a time to ON 7DEOH LVW RI FWXDWRU KHFNV CH Item Content CH Item Content CH Item Content 01 Starter ON OFF ON for 10 seconds 28 Water Motor Valve ON OFF 56 Gas valve 1 2 simultaneous...

Page 95: ...03 3 High static pressure support ON enabled OFF disabled factory default OFF 04 4 Energy saving cooling mode Note 1 ON enabled OFF disabled factory default OFF 6 Energy saving heating mode Note 1 ON...

Page 96: ...reen of the STOP mode on the PCB checker ODUP GLVSOD FRQWHQW GYEQ Models Error Outdoor unit display Run Lamp Inspection display Unit No Remote control display Blinking Blinking Blinking A0 Indoor Unit...

Page 97: ...Unit Electronic Expansion Valve Failure J1 Blinking Blinking Blinking J1 Air Fuel Ratio Controller Failure J2 Blinking Blinking Blinking J2 Intake Air Temperature Sensor Disconnected Shorted J3 Blinki...

Page 98: ...nits Slave Remote Control Unit Failure Blinking Blinking Blinking U9 Failure of Another Unit in the Same System UA Blinking Blinking Blinking UA Indoor Unit and Remote Control Mismatch On Off On UC Ce...

Page 99: ...eds to be replaced Replacing the external filter 1 Close the fluid side closing valve 2 Perform pump down operation special operation mode CH10 from onboard checker 3 After pump down is complete close...

Page 100: ...p Sequences 93 1 3 Actuators 95 1 4 Setting Up and Rewiring the Outdoor Unit 96 2 Outdoor Unit Control 98 3 Actuator Control 103 3 1 Electric Motor Operated Valve Control 103 3 2 Pump Control 107 3 3...

Page 101: ...ion valve initialization Start 023269 02EN05 Blowing Cooling Heating Cooling operation Heating operation Outdoor error indicator OFF Press the reset run stop switch Outdoor error indicator ON Blowing...

Page 102: ...ry device to heat the intake side refrigerant gas partially liquefied refrigerant This control function is triggered when the engine speed is at the lowest level and yet the low side pressure is lower...

Page 103: ...he target high side pressure The function optimizes the bypassed amount by controlling the opening degree of EV3 so that the target high side pressure remains at a constant level Heating Avoid High Si...

Page 104: ...Control Overview SiAUY361411EA 93 Control and Functionality 1 2 Startup Sequences Fig 3 4 Outdoor unit startup sequence A Go to A NO NO Go to A...

Page 105: ...stops at the time of t3 In checker mode the unit outputs an alarm and stops when the engine fails to start up at the first attempt Sequence applied when no engine speed pulse is detected When the star...

Page 106: ...ic expansion valve Clutches 1 2 Compressor heaters 1 2 Oil separator heater Accumulator heater Oil return heater SV1 solenoid valve SV2 solenoid valve SV3 solenoid valve SV4 solenoid valve SV6 solenoi...

Page 107: ...off the power and make sure that none of the LEDs on the circuit board are lit before turning back on the power An attempt to reset the power supply with any LED lit may fail due to electricity remain...

Page 108: ...position Binary system OFF at time of H LINK2 connection Refrigerant system address Lower position units position Binary system DSW2 Refrigerant piping system address is set at 23 DSW6 tens position R...

Page 109: ...ating control function If a severe backflow of fluid occurs while the outdoor unit is running this function is activated to perform bypass operation by closing electronic expansion valves EV1 and EV2...

Page 110: ...ned ON from the onboard checker this function is activated to automatically perform pump down operation Before using this function you have to close the stop valve on the liquid side The function comp...

Page 111: ...g Enhance Performance at Low Outdoor Air Temperatures control function When the number of engine speed steps is the maximum standard value high side pressure 1 is equal to or lower than the high side...

Page 112: ...t mode or super quiet mode is set possibly resulting in Cannot Get Cool Warm complaints from end users Configuring the quiet super quiet mode Normal operation mode The unit runs as normal without ente...

Page 113: ...t memory switch CH2 No 7 to the ON position How to connect the external contact input Connect the optional external contact harness to CN23 of the main circuit board to form a contact input circuit Me...

Page 114: ...during transition When the engine is running at the minimum speed and yet the high side pressure is higher than the predetermined level hot gas is bypassed to lower the high side pressure Cooling mai...

Page 115: ...eps the low side pressure at a constant level Heating heating main B These valves are normally controlled to the target of SHS3 20 C so that refrigerant flows into the waste heat recovery heat exchang...

Page 116: ...the optimal level Synchronized with EV1 Heating This valve is closed turned OFF SV7 SV9 All modes Adjusts the compressor oil return amount SV10 Cooling Reduces the intake pipe resistance Heating This...

Page 117: ...ve turns from the standby opening degree 30 pulses to the start up opening degree 120 pulses After startup The throttle valve opening degree is controlled to maintain the engine at the target speed Wh...

Page 118: ...rosting is performed The fan speed is reduced when the unit enters the quiet mode 3 4 Heater Control Compressor heater oil return heater All modes These heaters are always running turned ON while the...

Page 119: ...perform ignition Ignition timing control Ignition timing control works by advancing the ignition timing as the engine speed increases so that the engine can run efficiently Ignition timings advanced...

Page 120: ...hooting the Outdoor Unit 110 1 1 Error Codes 110 1 2 How to Use the Checker on PCB 113 1 3 RUN Mode 115 1 4 STOP Mode 121 1 5 Main Operations in Servicing 125 2 Flow Charts for Troubleshooting 128 2 1...

Page 121: ...ity Setting Incorrect Blinking Blinking Blinking C1 Indoor Unit Fan P Board Adaptor P Board Control P Board Transmission Failure Blinking Blinking Blinking C4 Indoor Unit Liquid Pipe Thermistor Fault...

Page 122: ...ure Sensor Disconnected Shorted JF Blinking Blinking Blinking JF Receiver Temperature Sensor System Failure L1 Blinking Blinking Blinking L1 Abnormal Exhaust Temperature L8 On Off On Off Off Periodic...

Page 123: ...gured Blinking Blinking Blinking UH System Failure Blinking Blinking Blinking UJ Optional Equipment Electrical Component Failure Caution Depending on the error content a service indication may not app...

Page 124: ...revious operation If operation is not possible due to sleep mode press SW2 checker wiring change once to release the sleep mode and enable operation Note if SW2 is held down the wiring change operatio...

Page 125: ...ion status display available when indoor units are connected The dot in the 6th digit leftmost indicates the status of communication with indoor units and flashes once when the connection is establish...

Page 126: ...tomatically released from the checker five hours after the termination of the operation and it returns to showing the total operated hours Level 1 Level 2 Level 3 Level 4 CH items 1 Outdoor unit 01 Ou...

Page 127: ...lse 47 SHS4 C 11 EV5 pulse 48 SHD1 C 12 EV6 pulse 49 SHD2 C 13 Water motor valve pulse 50 SHO1 C 14 Fan 1 min 1 51 SHO2 C 15 Fan 2 min 1 52 Reserved for future use 16 Fan 3 min 1 53 High pressure conv...

Page 128: ...eserved for future use 4 Reserved for future use 5 Reserved for future use 5 Reserved for future use 6 Reserved for future use 6 Reserved for future use 7 Reserved for future use 7 Reserved for future...

Page 129: ...d for future use 3 SV3 3 Reserved for future use 4 SV4 4 Reserved for future use 5 Reserved for future use 5 Reserved for future use 6 SV6 6 Reserved for future use 7 SV7 7 Reserved for future use 8 S...

Page 130: ...tem that is not supported by the unit model the LCD displays nothing or Note 1 Power reset is required after the operation is terminated OFF CH Item Content 01 Forced thermostat instruction ON OFF 02...

Page 131: ...fault ON Quiet mode operation ON Super quiet mode operation 7 OFF OFF ON 02 7 Quiet mode external signal ON quiet mode turned ON OFF via an external signal option OFF normal factory default OFF 03 3 H...

Page 132: ...of STOP mode menu items During STOP mode the display is automatically returned to STOP twenty seconds after the termination of operation 1 4 1 Alarm Display Enter STOP mode make sure that the display...

Page 133: ...as valve 2 ON OFF 30 Fuel control valve ON H OFF 57 59 Reserved for future use 05 Clutch 1 ON OFF 31 Reserved for future use 60 Reserved for future use 06 Clutch 2 ON OFF 32 Reserved for future use 61...

Page 134: ...ocessing indoor unit OFF normal factory default OFF 4 Quiet cooling mode Note 1 OFF Normal operation mode factory default ON Quiet mode operation ON Super quiet mode operation 5 OFF OFF ON 6 Quiet hea...

Page 135: ...he CH of the desired alarm warning Table 4 13 in Level 2 and press The code and operation time at occurrence are displayed alternately Table 4 13 Alarm warning display list CH Item CH Item 01 1st most...

Page 136: ...the alarm display from the onboard checker 1 Using the onboard checker Checker on PCB press and hold down for 3 seconds or longer when the unit is running or alternately showing the total operated ho...

Page 137: ...ed time since the last maintenance exceeds 10 000 hours the system enters the energy saving mode 3 When the elapsed time since the last maintenance exceeds 10 300 hours the system continues operating...

Page 138: ...to the new main circuit board The main CPU software is not prewritten onto the spare circuit board 1 Connect a PC to the main circuit board In the same way as for the PC checker 2 Write the main CPU s...

Page 139: ...ference T Between Intake Temperature And Temperature Set Point NO YES YES Change Remote Controller Temperature Set Point Is RUN Lamp on Remote Controller Lit NO YES Check Remote Controller Connections...

Page 140: ...or unit BS unit operating normally Is the piping between the outdoor unit indoor unit BS unit operating normally NO YES NO YES NO YES NO YES NO YES NO YES NO YES NO YES NO Change Temperature Set Point...

Page 141: ...Sure Failure Bypass Control Is Not Activated Is Compressor Intake Discharge Pressure Normal Is the four way valve operating normally Are the SV3A 3F and SV31 operating normally Are Outdoor Unit EVs an...

Page 142: ...ng Correct YES NO Configure Main Circuit Board NO Are Gas Valves Operating Normally YES NO Check Gas Valve System Is Cranking Speed Normal YES NO Is Mixer Operating Normally YES NO Check Mixer Check F...

Page 143: ...t Check Crank Pulse Sensor Check Gas Pressure whether Gas Pressure is stable 2 Engine Overspeed Error code E1 Description of the failure Sub code 0 While the unit is running the engine speed exceeds t...

Page 144: ...rcuit Board Is Oil Level Normal NO YES Check Oil Level Is Ignition System Operating Normally NO YES Check Ignition System Are Air Intake And Exhaust Ports And Air Cleaner Free From Clogging NO YES Che...

Page 145: ...ilure Oil pressure switch contact failure pressure regulator valve failure oil filter clogged oil level too low engine oil abnormally consumed oil leak Flow chart Is Unit Free From Oil Leaks YES Is Oi...

Page 146: ...emperature sensor failure main circuit board failure cooling water leak Flow chart Is Radiator Free From Clogging YES Is Unit Free From Cooling Water Leaks YES NO Check Cooling W NO Check Clogging NO...

Page 147: ...ure BS unit failure outdoor heat exchanger clogged indoor heat exchanger clogged short circuit external filter clogged Flow chart BS unit inspection Check Clogging Check Clogging Check Short circuit I...

Page 148: ...hanger clogged short circuit stop valve failure external filter clogged Flow chart YES YES YES YES YES YES YES YES YES YES YES YES YES Are Stop Valves Opened NO Check Stop Valves NO Check Fans Is SV1...

Page 149: ...g YES YES Are Fans Operating Normally Are Stop Valves Opened YES YES Are EVs Operating Normally NO Check EVs NO Check Stop Valves NO Check Fans NO Check Clogging YES NO Check Refrigerant Amount Check...

Page 150: ...Description of the failure Sub code 0 Incorrectly updated to a software version for a different model Sub code 2 Incorrectly updated to a software version for a different series Sub code 2 PCB is not...

Page 151: ...r failure Flow chart Is Unit Free From Obstacles Near Flywheel YES Check Crank Pulse Sensor Engine Does Not Crank YES Is Crank Pulse Sensor Operating Normally Do Ring Gear And Cell Motor Pinion Engage...

Page 152: ...main circuit board failure Flow chart Is Outdoor Unit Supply Voltage Normal YES Use Correct Combination of DCBL Circuit Board Connectors Fan 1 Fan 2 Fan 3 1 1 1 1 1 1 Is Connector Combination On Harne...

Page 153: ...Switch Connected Properly To Main Circuit Board s Harness 14 Cooling Water Temperature Sensor Disconnected Shorted Error code F4 Description of the failure Sub code 0 While the unit is running the coo...

Page 154: ...ature sensor 1 is shorted Sub code 3 While the unit is running the outdoor air temperature is 10 C or higher but discharge temperature 2 fails to rise above 0 C which means that discharge temperature...

Page 155: ...f Engine Room Having Reached Abnormally High Temperature Due to Combustion or Other Reason YES Are Intake Air And Oil Temperature Sensors Operating Normally YES Check whether the sensor is connected p...

Page 156: ...valve failure refrigerant overcharged indoor unit fan failure heater failure indoor unit filter heat exchanger fouled power supply failure refrigerant recharging incorrect energization time too short...

Page 157: ...urn ON the power for the outdoor unit first Are Filter and Heat Exchanger in Indoor Unit Not Contaminated YES YES YES Is Indoor Unit Fan Operating Normally NO Check Indoor Unit Fan NO Clean Wash Is EV...

Page 158: ...or higher than 2 6 MPa and the previously reported high side pressure is equal to or lower than 1 8 MPa Possible causes of the failure Oil se external filter clogged parator clogged high side pressure...

Page 159: ...second Sub code 4 The voltage equivalent to the primary coil current of cylinder 4 remains 0 for 1 second Possible causes of the failure Ignition system failure fuel supply failure intake exhaust sys...

Page 160: ...lure Pressure sensor failure compressor failure rib belt failure compressor clutch failure SV failure four way valve failure short of refrigerant Flow chart YES NO YES NO YES NO YES NO NO YES Check Ri...

Page 161: ...e indoor unit filter heat exchanger fouled refrigerant overcharged Flow chart Is Indoor Unit Electronic Expansion Valve Operating Normally YES NO Check Electronic Expansion Valve Are Indoor Unit Filte...

Page 162: ...code 3 While the unit is running intake air temperature 2 is reported as 201 C which means that intake air temperature sensor 2 is shorted Sub code 4 While the unit is running intake air temperature 3...

Page 163: ...perature sensor is disconnected Sub code 1 While the unit is running the outdoor air temperature is reported as 201 C which means that the outdoor air temperature sensor is shorted Possible causes of...

Page 164: ...equal to or lower than 2 C 2 SHS3 is equal to or lower than 2 C 3 SHS1 is higher than 3 5 C 4 the high side pressure minus low side pressure is equal to or higher than 1000 kPa 5 EV5 is equal to or l...

Page 165: ...While the unit is running the oil return filter is clogged or the SV9 error flag is ON Possible causes of the failure SV failure sensor failure oil return refrigerant piping clogged oil separator filt...

Page 166: ...s running high side pressure 2 is reported as 5000 kPa which means that high side pressure sensor 2 is shorted Sub code 7 While the unit is running high side pressure 2 is reported as 5100 kPa which m...

Page 167: ...orrect YES NO Configure Main Circuit Board If Exhaust Temperature Sensor Is Not Used Is Memory Switch 13 0 Setting Correct YES NO Configure Memory Switches 025897 00E Check whether sensor connected pr...

Page 168: ...lure to compressor automatic emergency run Sub code 7 Changes from J6 oil return solenoid valve failure to compressor automatic emergency run Sub code 8 Changes from J7 high side pressure sensor syste...

Page 169: ...ressure 1 is equal to or lower than 3300 kPa 4 the low side pressure is equal to or lower than 3300 kPa Sub code 2 While the unit is stopped the following conditions continue for 20 seconds 1 High sid...

Page 170: ...C which means that oil temperature sensor 2 is shorted Sub code 4 After 20 minutes have elapsed since the start of operation oil temperature 3 remains equal to or lower than 0 0 C for 1 minute Sub cod...

Page 171: ...mperature sensor 31 is disconnected Sub code 1 While the unit is running receiver temperature 31 is reported as 201 C which means that receiver temperature sensor 31 is shorted Possible causes of the...

Page 172: ...perating Normally YES YES Is Fuel Gas Type Setting Correct Is Ignition System Operating Normally YES Is Engine Cooling Water System Operating Normally YES Is Mixer Operating Normally YES NO Check Igni...

Page 173: ...e elapsed time since the last maintenance exceeds 10300 hours Is Arrival Of Maintenance Timing Indicated As Error Code YES NO YES NO Perform Periodic Inspection Is Elapsed Time Since Last Maintenance...

Page 174: ...rature and gas pipe temperature high pressure side saturation temperature Possible causes of the failure BS unit expansion valve failure BS unit circuit board failure piping clogged SV failure indoor...

Page 175: ...Capacity Too Large Error code P3 Description of the failure Sub code 0 The total capacity of connected indoor units is beyond the upper limit specific to the outdoor unit model Possible causes of the...

Page 176: ...circuit board failure main circuit board failure T phase missing Flow chart If checker display is If sub code 0 If sub code 2 If sub code 3 or 5 Software rewritten Is the power supply circuit board LE...

Page 177: ...CBL main circuit board s CN210 including high power CN211 operating normally YES Is DCBL Circuit Board Powered ON Is LED10 Flashing NO Check Input Output Voltage Of Outdoor Indoor Unit Breaker NO Is S...

Page 178: ...e incorrectly installed Flow chart YES NO YES NO YES NO YES NO Are Outdoor Units Powered ON Check And Turn ON Power Supply Does Earth Leakage Breaker ELB In Outdoor Unit Remain Inactive Check And Repa...

Page 179: ...PU mismatch indoor outdoor unit connection failure communication line connection failure remote controller connection failure software version mismatch outdoor unit mismatch Flow chart Sub Code 2 Are...

Page 180: ...184 1 16 Inspecting the Cooling Water Level 185 1 17 Inspecting the Water Motor operated Valve 185 1 18 Inspecting the Thermostat 186 1 19 Inspecting the Cooling Water Concentration 187 1 20 Inspectin...

Page 181: ...it with the power ON take extreme care to keep away from any energized parts or rotating parts Caution Since some parts such as engine parts contained in the outdoor unit remain hot for some time afte...

Page 182: ...t 20 C reference value Inspecting the reactor Inspect the reactor by measuring the resistance between its terminals At 20 C reference value Parts to inspect Measuring points During system stop After s...

Page 183: ...round Check if the ring gear and self starter motor pinion engage smoothly while operating them with the actuator check function If they do not smoothly engage or the ring gear end face is damaged ins...

Page 184: ...s by measuring the resistance between their terminals Parts to inspect Measuring points During system stop While system running with actuator check ON Gas solenoid valve 1 Between main circuit board s...

Page 185: ...N Throttle valve Between main circuit board s CN8 1 and CN1 3 12 V DC Between main circuit board s CN8 3 and CN1 3 12 V DC Fuel control valve Between main circuit board s CN8 2 and CN1 3 12 V DC Betwe...

Page 186: ...tches on the outdoor unit s main circuit board have been correctly configured in accordance with the fuel gas type Any adjustments made should be based on the O2 concentration Fuel gas type 3GPH88 4GP...

Page 187: ...g of cylinder No 1 based on the position where the flywheel tick mark comes to rest Check the ignition timing of other cylinders by repeating this procedure If the ignition timing significantly differ...

Page 188: ...and flywheel for any gap Inspecting the cam pulse sensor Inspect the cam pulse sensor by measuring the resistance between its terminals Note No gap adjustment is required for the cam pulse sensor Meas...

Page 189: ...ition plug for any damage stains and wear If the electrode is stained clean the electrode and check and adjust the spark gap If the electrode is damaged or worn replace it with new one Measuring point...

Page 190: ...on whether air bubbles are seen 1 7 Inspecting the Valve Clearance 1 With the bonnet cover removed set the cylinder being tested to the top of the compression stroke 2 Measure the valve clearance usin...

Page 191: ...gree using the checker Forgetting to set the throttle to the fully closed opening degree could be very dangerous because the engine will rev up to a high speed the next time the system is started Warn...

Page 192: ...Check the cleaner interior and the element for any dirt or dust 1 11 Inspecting the Breather Hose Remove the breather hose from the engine bonnet and check if there is any sludge remaining in the hose...

Page 193: ...h as a stem seal or a faulty piston ring After repair refill lubricating oil to the standard level GYEQ20AN GYEQ30AN Factory oil level A in the figure below l 44 58 Factory oil level B in the figure b...

Page 194: ...the pressure at the high side pressure servicing port not at the stop valve rises rapidly after the system starts up in heating mode chances are that the oil separator is clogged Replace the oil sepa...

Page 195: ...Leaks Inspecting the radiator cap While pressurizing the radiator cap with a cap tester read the graduation of the gauge Checking for water leaks While pressurizing the cooling water passage with a ca...

Page 196: ...e stop the system using the onboard checker and wait for 5 minutes then with the power OFF check the harness for continuity and the junction connectors for contact failure using a tester 3 If the harn...

Page 197: ...the thermostat components before they are assembled do not reuse the components after disassembly Use new thermostat components Measuring points Measured value Between terminals 2 red and 4 pink 70 B...

Page 198: ...ter Temperature Sensor Test the resistance between A and B terminals with a tester For the temperature resistance characteristics see page 225 Table7 3 List of resistance temperature characteristics o...

Page 199: ...f no continuity is detected but your inspection finds no problems with the exhaust temperature sensor itself chances are that there is a contact failure When a contact failure is suspected check the e...

Page 200: ...mpressor itself but also may be caused by a fault in the freezing cycle system 2 After replacing the compressor inspect the freezing cycle system by performing measurements at the following measuring...

Page 201: ...to inspect Measuring points Actuator check CH ON OFF Compressor clutch 1 Between main circuit board s CN9 6 and ground 8 05 12 V DC 0 V Compressor clutch 2 Between main circuit board s CN9 7 and grou...

Page 202: ...Actuator CH14 200 V Solenoid valve 37 Actuator CH41 200 V Solenoid valve 3 Between power supply circuit board s CN115 1 and 3 Actuator CH15 200 V Solenoid valve 12 Between power supply circuit board...

Page 203: ...ing a tester 3 If the harness and connectors are OK then check each component Inspecting the fan motor Inspect the fan motor by measuring the resistance between its terminals At 20 C reference value P...

Page 204: ...chine oil is collected in the compressor oil reservoir Check the stop valve and servicing port operating portion for any problems Check the fusible plug of the receiver tank for any problems Check the...

Page 205: ...alve 1 While the unit is running check if a temperature difference exists between points A and B in the pipe when the pipe internal pressure is lower at point A than at point B If there is no temperat...

Page 206: ...ng the resistance of its coil Measuring points Measured value Between terminals 1 red and 4 white 46 Between terminals 1 red and 6 amber 46 Between terminals 1 red and 5 yellow 46 Between terminals 1...

Page 207: ...the flange of the valve to prevent gas leaks Apply refrigerating machine oil to both end faces of the packing Discharge gas side 026746 03EN00 Flare nut tightening torque M6 hexagon socket head cap sc...

Page 208: ...number of pulses from EV4 is 5 Use the onboard checker s channel 10 2 Calculate SH using the formula SHS4 intake air temperature 4 CH28 temperature equivalent temperature CH55 3 If SHS4 is approximate...

Page 209: ...The input voltage is 5 V constant when measured between the main circuit board s CN4 5 black and 6 red Inspecting the discharge temperature sensor Measure the resistance between terminals If the actu...

Page 210: ...he resistance between terminals If the actually measured value is approximately equal to the checker value it means that the sensor is normal For the resistance temperature characteristics of various...

Page 211: ...15 A F4 Ignition power supply 250 V 15 A F5 200 V based load 250 V5 A F101 Main circuit board power supply 250 V 4 A Main circuit board F1 Communications with indoor units 250 V 0 5 A F2 Clutch 125 V...

Page 212: ...stance between terminals Inspecting the accumulator heater Measure the resistance between terminals Inspecting the oil return heater Measure the resistance between terminals Measuring points Measured...

Page 213: ...Safety Precautions 203 1 2 Safety Precautions for Replacement 203 2 Replacement of Primary Parts 204 2 1 Replacing the Engine 204 2 2 Replacing the Compressor 206 2 3 Replacing the Compressor Heater 2...

Page 214: ...to have the refrigerant recovered by a recycle company registered with the local government not only when replacing refrigerant system parts but also when just servicing the refrigerant system Also h...

Page 215: ...xhaust manifold Engine nameplate Cooling water outlet Water temperature sensor Cooling water pipe Cylinder inlet Gear case lid Exhaust gas cooler Exhaust gas outlet Auxiliary tank joint 040434 00EN01...

Page 216: ...water temperature is high cool down the cooling water using the cooling water cool down mode of the actuator check function 3 Remove the strut located at the center of the front side 4 Place wooden b...

Page 217: ...in filters 11 Remove the front comp bracket and remove the bolts that anchor the back comp bracket to the engine 12 Remove the engine mount on the front right side 13 Pull out the engine Take care to...

Page 218: ...ith 5 to 10 mm shims Fit the engine with the wooden bases from beneath the front comp bracket to the back comp bracket and fill the gap toward the engine oil pan with thin shims 5 Set another wooden b...

Page 219: ...ing the oil return first could result in the oil spouting The oil return cabinet pipe must be restored exactly to its original clamped conditions number of clamp turns and position If the original cla...

Page 220: ...Remove the compressor heater Reverse the steps above to install the replacement Make sure that the types and sizes length in particular of the bolts and nuts are correct 2 4 Charging the Refrigeratin...

Page 221: ...fore proceeding with the following steps 1 Remove the strut on the front left side 2 Remove the starter transformer rectifier and reactor 3 Remove all harnesses connected to the connectors inside the...

Page 222: ...1 2 Periodic Inspection Procedure for the Outdoor Unit 213 2 Servicing Data 225 2 1 Resistance Temperature Characteristics of Various Sensors 225 2 2 Pressure Voltage Characteristics of Pressure Senso...

Page 223: ...parts Engine oil V 1 z Engine oil filter z z Air cleaner element z z Spark plug z z Valve clearance V V Cooling water including antifreeze fluid Exhaust drain filter 2 Exhaust drain filter packing z...

Page 224: ...engine is stopped Do not attempt to open the radiator cap until the cooling water temperature is low enough Otherwise the cooling water may spout out possibly resulting in a burn Caution The outdoor u...

Page 225: ...SiAUY361411EA Maintenance Maintenance Service Data 214...

Page 226: ...the oil filter Use an oil filter wrench Do not use a filter wrench when tightening the filter this does not apply to a torque wrench Cover the filter with waste cloth to absorb dripping oil 3 Install...

Page 227: ...e wing nuts or other parts 3 Inspect the element mounting portion Clean the air cleaner interior and element mounting portion if stained 4 Install the element and element cover 1 Fit the new element w...

Page 228: ...ove the spark plug Use a plug wrench to remove the plug Take care not to drop and damage the plug 4 Replace the spark plug Install a new spark plug 1 Check the gap using a thickness gauge 0 Standard g...

Page 229: ...ed based on the fact that the intake exhaust valve adjusters have a play when the piston is at the top dead center 5 Check the current clearance 1 Move the valve up down by hand 2 Use a thickness gaug...

Page 230: ...check if water is leaking or if the exhaust drain water is stained with antifreeze fluid Refill water if below the FULL level 3 Refill the cooling water Remove the radiator cap and reservoir tank cap...

Page 231: ...n remove the remaining neutralizer from the drain filter This is in order to check how much the neutralizer at the bottom of the drain filter is contaminated 3 Refill neutralizer and wash the filter 1...

Page 232: ...d 5 Replace the hose Install a new hose 1 Set the hose bands onto the hose in advance 2 Install the hose onto the mixer by completely inserting it 3 Lay the hose and fasten it with clamps or the like...

Page 233: ...he belt and pulley must be free from oil or foreign matter The compressor is heavy Take care not to pinch your fingers 5 Adjust the tension 1 Tighten the tension bolt 4 to adjust the belt tension For...

Page 234: ...ith pinch tools How to fix water leaks from a hose clip portion When inspecting a system that uses hose clips you may find and need to fix water leaks from a hose where it is fastened with a hose clip...

Page 235: ...areas and fusible plugs Use a soap solution or leak detector 3 Check for refrigerating machine oil leaks 1 Check the refrigerant circuit for any refrigerating machine oil sticking to flange connecting...

Page 236: ...re C R K Temperature C R K Temperature C R K Temperature C R K 200 30 3 30 28 6 0 162 2 30 363 8 250 12 4 20 16 2 10 98 3 25 266 8 300 5 9 10 9 6 20 61 5 20 197 8 350 3 1 0 5 9 30 39 5 15 148 2 400 1...

Page 237: ...ure MPa Voltage value DCV Disconnected 5 Disconnected 5 0 0 50 0 0 50 1 41 1 52 0 84 1 35 2 08 2 00 1 50 2 03 2 82 2 54 2 04 2 59 4 15 3 50 3 33 3 90 Shorted to the 5 V side 5 Shorted to the 5 V side...

Page 238: ...08 3 23 53 7 3 83 61 3 0 24 24 2 0 84 5 3 1 44 22 4 2 04 35 04 2 64 45 24 3 24 53 9 3 84 61 4 0 25 23 4 0 85 5 6 1 45 22 6 2 05 35 23 2 65 45 39 3 25 54 0 3 85 61 5 0 26 22 7 0 86 6 0 1 46 22 9 2 06...

Page 239: ...6 NO 24 to 34 Exhaust gas cooler drain plug 3GPH88 3GPJ88 4GPH88 M8 1 25 12 NO 22 to 28 Exhaust temperature sensor All models M12 1 25 14 NO 34 to 44 Water temperature sensor All models M12 1 5 19 NO...

Page 240: ...MHI type to upper comp bracket FC250 AL M10 40 4 Gas solenoid valves to regulator AL AL M4 2 8 0 3 Gas solenoid valves to inlet pipe Iron AL M4 2 8 0 3 Propeller fan to fan motor PPG Iron M10 21 6 2 2...

Page 241: ...r side temperature C 45 45 3 3 Q EV1 receiver side temperature C 44 44 23 24 R EV2 receiver side temperature C 44 44 23 24 S Receiver inlet temperature C 44 44 29 30 T Receiver outlet temperature C Re...

Page 242: ...reference circuit Operating conditions Under 100 load with refrigerant piping length of 7 5 m Cooling operation reference values Heating operation reference values Symbols used in drawings Part PC che...

Page 243: ...oor heat exchanger F Outdoor heat exchanger B Outdoor fan Indoor unit Oil separator Compressor 1 Compressor 2 Indoor unit BS unit BS unit e Intake gas Discharge gas Liquid c d PL Solenoid valves Elect...

Page 244: ...Revision History Month Year Version Revised contents 07 2014 SiAUY361411E First edition 11 2015 SiAUY361411EA Changes due to addition of accumulator and revision of troubleshooting flowchart...

Page 245: ...s supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and accesso...

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Daikin GYEQ20AN, Service Manual

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