Johnson Controls DHR18CSB21S Installation And Maintenance Manual Download

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E4 Discharge Protection

E6 Communication Malfunction

Communication

malfunction

Check if the

communication wire between

indoor unit and outdoor unit is

connected well

Check if there is

open circuit in the communication

wire between indoor unit and

outdoor unit

Reconnect the

communication

wire

Replace the

communication

wire

Check if the

outdoor unit is energized

Energize the

outdoor unit

Replace the mainboard

Yes

Summary of Contents for DHR18CSB21S

Page 1: ...E OUTDOOR UNITS DHR18CSB21S DHR24CSB21S DHR30CSB21S DHR36CSB21S DHR42CSB21S DHR48CSB21S INDOOR UNITS DUCT DHR18NDB21S DHR24NDB21S DHR30NDB21S DHR36NDB21S DHR42NDB21S DHR48NDB21S Type Model Model Type 03257 17 INDOOR UNITS CASSETTE DHR18NKB21S DHR24NKB21S DHR30NKB21S DHR36NKB21S DHR42NKB21S DHR48NKB21S Type Model INDOOR UNITS CEILING DHR18NCB21S DHR24NCB21S DHR30NCB21S DHR36NCB21S DHR42NCB21S DHR48...

Page 2: ...d advanced information to maintain and service this inverter driven cooling or heat pump air conditioning unit which you operate as well for other models This inverter driven cooling or heat pump air conditioning unit has been designed for a specific temperature range For optimum performance and long life operate this unit within range limits This manual should be considered as a permanent part of...

Page 3: ...tion in Connecting 28 4 2 Specification of Connection Pipe 33 5 ELECTRIC WIRING WORK 33 5 1 Wiring Precautions 33 5 2 Electrical Wiring 34 1 INTRODUCTION AND SAFETY SUMMARY i 6 MAINTENANCE TROUBLESHOOTING 41 6 1 Main Control Malfunction 41 6 2 Description of Drive Malfunction 43 7 FLOW CHART OF TROUBLESHOOTING 45 7 1 Troubleshooting Flow Chart of Main Control Malfunction 45 7 2 Troubleshooting Flo...

Page 4: ...orrectly injuries may occur due to a falling unit Use appropriate Personal Protective Equipment PPE such as gloves and protective goggles and where appropriate have a gas mask nearby Also use electrical protection equipment and tools suited for electrical operation purposes Keep a quenching cloth and a fire extinguisher nearby during brazing Use care in handling rigging and setting of bulky equipm...

Page 5: ...sure the condensate hose discharges water properly If connected incorrectly it may cause leaks Do not install the unit in any place where oil can seep onto the units such as table or seating areas in restaurants and so forth For these locations or social venues use specialized units with oil resistant features built into them In addition use a specialized ceiling fan designed for restaurant use Th...

Page 6: ...son Controls Johnson Controls uses only refrigerants that have been approved for use in the unit s intended home country or market Johnson Controls distributors similarly are only authorized to provide refrigerants that have been approved for use in the countries or markets they serve The refrigerant used in this unit is identified on the unit s faceplate and or in the associated manuals Any addit...

Page 7: ...gas and liquid valves otherwise these devices will be damaged It is closed before shipment If the arrangement for outdoor units is incorrect it may cause flowback of the refrigerant and result in failure of the outdoor unit The refrigerant system may be damaged if the slope of the piping connection kit exceeds 15o Electrical Precautions Take the following precautions to reduce the risk of electric...

Page 8: ...nel to the indoor or outdoor units without turning OFF the main power supply After ceasing operation be sure to wait at least five minutes before turning off the main power switch Otherwise water leakage or electrical breakdown may result Disconnect the power source completely before attempting any maintenance for electrical parts Check to ensure that no residual voltage is present after disconnec...

Page 9: ...bstances are stored thus to avoid possible explosion or fire due to leakage 2 1 2 Installation Site Ensure the top mounting bracket is strong enough to withstand the weight of the unit Ensure condensate pipe has convenient flow of water Ensure there is no obstacle blocking the return air inlet and exhaust outlet so as to ensure sound air circulation The installation spaces required by the drawing ...

Page 10: ...les connecting lines of wire zone controller indoor unit and outdoor unit must be ready before the installation so as to achieve smooth installation Drill an opening on the ceiling depending on the ceiling type Providing additional support may be required to prevent vibration and ensure the evenness of the ceiling Consult with the user or a construction company for advice In case the strength of c...

Page 11: ...the inside of the unit is in the negative pressure status it is required to set up a backwater elbow The requirement is A B 0 145P 10000 20 25 4 inch P is the absolute pressure inside the unit The unit of the pressure is psig Figure 3 1 5 2 1 4 Dimension Data For the units 18k For the units 24k 42k ...

Page 12: ... 4 Table 3 1 2 Installation Accessories List for Duct type Indoor Unit Name Shape QTY Notes Installation and Operating Instructions 1 Insulation materials for gas pipe 1 Used for gas pipe connector on indoor unit Insulation materials for liquid pipe 1 Used for liquid pipe connector on indoor unit Insulation materials for drainage pipe 2 Used for wrapping the condensate pipe and rubber plug Nut 1 T...

Page 13: ...anual and keep the a rea warm enough to prevent condensation Problems with the piping may lead to water leaks 1 Install the condensate hose with downward gradient 1 50 to 1 100 and no risers or traps are used for the hose Figure 3 1 8 2 Be sure there is no crack or leak on the condensate hose to avoid the formation of air pockets Figure 3 1 8 3 When the hose is long install supporters Figure 3 1 9...

Page 14: ...gure 3 1 10 7 When the unit is shipped from the factory the drain port is defaulted to be the one on the left side electric box side The port on right side has been plugged 8 When using the drain port on the right side of the unit reinstall the drain cap to the left side drain port Figure 3 1 12 Drain port Fastener Drain cap Figure 3 1 12 Always check that the drain cap is installed to the unused ...

Page 15: ...om that of the unit without the condensate pump 3 For the unit with the condensate pump two drain ports at the bottom are defaulted to be factory plugged with drain caps After the installation of the condensate hose these two drain ports also need to be insulated properly with the same way as aforementioned 4 The condensate hose for the unit with the condensate pump should be arranged as shown in ...

Page 16: ...pply Air Outlet C D Figure 3 1 19 Return Air Inlet Table 3 1 3 Unit mm inch Item Model Supply Air Outlet Return Air Inlet A B C D DHR18NDB21S 123 4 7 8 736 29 710 28 166 6 1 2 DHR24NDB21S 158 6 1 4 818 32 1 4 994 39 1 8 195 7 5 8 DHR30NDB21S 158 6 1 4 818 32 1 4 994 39 1 8 195 7 5 8 DHR36NDB21S 158 6 1 4 818 32 1 4 1000 39 3 8 206 8 1 8 DHR42NDB21S 158 6 1 4 818 32 1 4 1000 39 3 8 206 8 1 8 DHR48N...

Page 17: ...e 3 1 21 3 If a bottom return air is desired just change the place of the rectangular flange and the return air cover plate 4 Connect one end of the return air duct to the return air outlet of the unit by rivets and the other to the return air louver For the sake of convenience to freely adjust the height a cutting of canvas duct will be helpful which can be reinforced and folded by 8 iron wire 5 ...

Page 18: ...ry parts are correct Determine the correct handling route and methods thus to avoid damaging the unit or causing possible hazard For the sake of protection and safety it is suggested to move the unit with the packaging box Even though it is not permitted to do like this under special occasions do not remove the packaging box thus to avoid loosening or falling during handling Confirm if the install...

Page 19: ...the ceiling should be kept as much as possible so as for more convenient service 2 2 3 Indoor Unit Installation 1 Determine the location of the hanger through the paper template and then remove the paper template Figure 3 1 24 2 Insert the anchor bolts into the drilled holes and drive the pins completely into the anchor bolts with a hammer ...

Page 20: ...ve the screws shown in the picture Push the side plate as per the arrow direction and take it down Remove the screw Figure 3 1 26 5 Put the hanger bolt into the clasp of the indoor unit and tighten screws on the hanger to prevent the indoor unit from moving 6 Reinstall and tighten the right and left side panels Floor type Left side panel Wall Paper template Right side panel Figure 3 1 27 ...

Page 21: ...nel Figure 3 1 28 7 Adjust the height of the unit to make the condensate pipe slant slightly downward so that the drainage will become much smoother 2 2 4 Leveling The water level test must be done after installing the indoor unit to make sure the unit is horizontal as shown below Horizontal tester Figure 3 1 29 ...

Page 22: ... When Doing the Piping Work 1 Keep piping as short as possible and slope it downwards at a gradient of at least 1 100 so that air may not remain trapped inside the pipe 2 Keep pipe size equal to or greater than that of the connecting pipe 3 Install the condensate piping as shown and take measures against condensation Improperly rigged piping could lead to leaks and eventually property damage Exten...

Page 23: ...h from the hose Figure 3 1 34 ķ Metal clamp ĸ Drain hose Ĺ Grey tape Insulate the pipe clamp and the condensate hose using heat insulation sponge Figure 3 1 35 ķ Metal clamp ĸ Insulation sponge Note Step 1 to Step 3 have been finished by the manufacturer 4 When condensate hose requires extension obtain an extension hose available commercially 5 After connecting the local condensate hose tape the s...

Page 24: ...es in reference to the packing list Ensure that the model is correct and the machine is in good condition Please also check if the specification and quantity of accessory parts are correct Determine the correct handling route and methods to avoid damaging the unit or causing possible hazard For the sake of protection and safety it is suggested to move the unit with the packaging box Even though so...

Page 25: ...te water and connect with the outdoor unit 6 Make sure that there is enough space for care and maintenance and the height between the indoor unit and ground is above 1800mm 6ft 7 When installing the suspension bolt check if the installation place can withstand four times the weight of the unit If not reinforce it before installation Note There could be a large amount of greasy dirt accumulated on ...

Page 26: ...paper template on the unit and secure the condensate pipe at the outlet vent 3 Adjust the unit to the best position 4 Check if the unit is installed horizontally at four directions If not the water pump and the float switch would function improperly and even lead to water leakage 5 Remove the gasket anchor board and tighten the remaining nut 6 Remove the paper template 2 3 4 Installing the Suspens...

Page 27: ...panel and the connecting pipe Figure 3 1 44 2 Place the panel at the unit and latch the hooks beside and opposite the swing flap motor 3 Latch other two hooks 4 Tighten four hexagonal screws under the latches about 15mm 5 8inch 5 Adjust the panel along the direction indicated by the arrow as shown in Figure 3 1 45 6 Tighten the screws until the thickness of the sealing material between the panel a...

Page 28: ... in Figure 3 1 46 Air leak Condensate Figure 3 1 46 8 If gap still exists between ceiling and decorative panel after tightening the screws readjust the height of the indoor unit Figure 3 1 47 No gap is allowed Adjustment of the indoor unit body from the holes in the corner of the panel is possible if the indoor unit can always be kept horizontal and the condensate pipe will be unaffected Figure 3 ...

Page 29: ...rding to the size of terminals Figure 3 1 48 2 3 7 Dimension Data For the units 18k Table 3 1 8 Unit mm inch Item Model A B C D E F G H I J DHR18NKB21S 670 26 3 8 596 23 1 2 592 23 1 4 575 22 5 8 145 5 3 4 240 9 1 2 665 26 1 8 236 9 1 4 575 22 5 8 505 19 7 8 For the units 24k 42k Table 3 1 9 ...

Page 30: ...eiling B A C D E F Figure 3 1 49 Table 3 1 10 Unit mm inch Item Model A B C D E F DHR48NKB21S 1040 41 910 35 7 8 842 33 1 8 788 31 170 6 3 4 290 11 3 8 2 3 8 Installation of Condensate Piping 1 Keep piping as short as possible and slope it downwards at a gradient of at least 1 100 so that air may not remain trapped inside the pipe 2 Keep pipe size equal to or greater than that of the connecting pi...

Page 31: ... When unifying multiple condensate pipes install the pipes as in Figure 3 1 51 Select converging condensate pipes whose gauge is suitable for the operating capacity of the unit take the cassette type unit for example Figure 3 1 51 4 When the condensate hose cannot keep a sufficient gradient it is necessary to fit a riser pipe field supplied to it 5 If the air flow of indoor unit is high this might...

Page 32: ...igure 3 1 55 Figure 3 1 56 Figure 3 1 57 2 3 10 Precautions When Doing Riser Piping Work 1 Make sure that heat insulation work is executed on the following two spots to prevent any possible water leakage due to condensation 1 Connect the condensate hose to the drain lift pipe and insulate them 2 Connect the condensate hose to the drain outlet on the indoor unit and tighten it with the clamp Figure...

Page 33: ...piping work is finished check if drainage flows freely Shown in the Figure 3 1 61 add approximately 1liter of water slowly into the condensate pan and check drainage flow during COOL running Condensate hose Test hole cover Test hole Limiting water from the rest of hole Plastic water pot The length of the pipe should be about 100mm 3 7 8inch Limiting water from the outlet vent terminal Above 100mm ...

Page 34: ...installation is far from the area where the inflammable or explosive substances are stored to avoid possible explosion or fire due to leakage 3 2 Installation Site ķ Install the unit where it will not be tilted by more than 5 ĸ During installation if the outdoor unit has to be exposed to strong wind it must be fixed securely If possible do not install the unit where it will be exposed to direct su...

Page 35: ... is kept vertically and horizontally correct The outdoor unit must be lifted by using the designated lift hole During lifting take care to protect the air conditioner and avoid knocking the metal parts to prevent rusting in the future To meet the noise and vibration requirements the outdoor unit should be installed by using rubber damping pad or spring damper To install the condensate pipe please ...

Page 36: ... and remove the burrs 2 Hold the pipe downward to prevent cuttings from entering the pipe 3 Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the indoor unit then insert them to the connection pipe after that flare the connection pipe with a flaring tool 4 Check to ensure the flare part is spread evenly and there are no cracks see Figure 3 3 1 d2 d1 d1 d2 ...

Page 37: ...re to apply the pipe against the port on the indoor unit correctly If the centering is improper the flare nut cannot be tightened smoothly If the flare nut is forced to turn the threads will be damaged ĸ Do not remove the flare nut until the connection pipe is to be connected so as to prevent dust and impurities from coming into the pipe system When connecting the pipe to the unit or removing it f...

Page 38: ... 1b 9 5mm 3 8inch 35 40N m 26 29ft 1b 12 7mm 1 2inch 45 50N m 33 37ft 1b 16mm 5 8inch 60 65N m 44 48ft 1b Be sure to connect the gas pipe after connecting the liquid pipe completely 4 1 4 Connecting the Pipe at the Outdoor Side Unit Tighten the flare nut of the connection pipe at the outdoor unit valve connector The tightening method is the same as that as at the indoor side Gas pipe Liquid pipe P...

Page 39: ...pressure side of the manifold valve assembly to the service port of the unit s gas valve and make sure the gas and liquid valves should be kept closed in case of refrigerant leak 3 Connect the hose used for evacuation to the vacuum pump 4 Open the switch at the lower pressure side of the manifold valve assembly and start the vacuum pump Meanwhile the switch at the high pressure side of the manifol...

Page 40: ...port Cap Hose Vacuum pump Cap Service pipe Cap Connection pipe Figure 3 3 7 Note For the large sized unit it has the service port for both the gas valve and the liquid valve During evacuation it is available to connect two hoses of the manifold valve assembly to two service ports to quicken the evacuating speed 4 1 7 2 Additional Charge Refrigerant suitable for a piping length of 7 6m 25feet is ch...

Page 41: ...essure of 6 0MPa 870psig The longer the connecting pipe the lower the cooling and heating effect performs 5 ELECTRIC WIRING WORK 5 1 Wiring Precautions ķ Before obtaining access to terminals all supply circuits must be disconnected ĸ The rated voltage of the unit is as shown as Table 1 4 1 and Table 1 4 2 Ĺ Before turning on verify that the voltage is within the 187 252V range for single phrase un...

Page 42: ...hten securely with the terminal screw using a screwdriver 2 For strand wiring Figure 3 4 1 1 Cut the wire end with a wire cutter or wire cutting pliers then strip the insulation about 10mm 3 8inch 2 Using a screwdriver remove the terminal screw s on the terminal board 3 Using a round terminal fastener or pliers securely clamp a round terminal to each stripped wire end 4 Position the round terminal...

Page 43: ...ctric parts Ĺ Erroneous wiring may cause burning of the electric parts ĺ Connect the connection cords firmly to the terminal block Imperfect installation may cause a fire Ļ Always fasten the outside covering of the connection cord with cord clamps If the insulator is not clamped electric leakage may occur ļ Always connect the ground wire 4 Electric wiring between the indoor and outdoor units Duct ...

Page 44: ...36 Cassette Type Unit Single phase units 18k Single phase units 24k 30k Single phase units 36k 42k ...

Page 45: ...37 Single phase units 48k Floor ceiling Type Unit Single phase units 18k 30k Single phase units 36k 48k Figure 3 4 4 ...

Page 46: ... the electric box sub assy and then connect the wire Duct Type Unit Electric box sub assy Electric box cover L1 L2 F C O H1 H2 1 2 Figure 3 4 5 The F C O connect to the COMMOM CLOSE and OPEN terminal of the fresh air valve respectively Cassette Type Unit For the units 18k 42k ...

Page 47: ... communication cord and connection wire of the wired zone controller are low voltage They should run separately against electromagnetic interference 8 The high voltage and low voltage lines should pass through the rubber rings at different electric box covers 9 Do not bundle the connection wire of the wired zone controller and the communication cord together or arrange them in parallel otherwise i...

Page 48: ... properly based on the corresponding marks as shown in Figure 3 4 4 ľ Ground both the indoor and outdoor units by attaching a ground wire Ŀ Unit shall be grounded in compliance with the applicable local and national codes 6 Electric wiring of outdoor unit side NOTICE When connecting the power supply cord make sure that the phase of the power supply matches with the exact terminal board If not the ...

Page 49: ...utomatically Refrigerant lacking protection If the unit reports system refrigerant lacking within 10min after turning on the unit the unit will stop operation If the fault occurs successively 3 times the unit cannot be recovered automatically Refrigerant recycling mode If enter refrigerant recycling mode through special operation E3 will be displayed After exiting refrigerant recycling mode the co...

Page 50: ... code is displayed and the indoor unit can work normally 11 F3 Malfunction of outdoor ambient temperature sensor Outdoor ambient temperature sensor If the outdoor ambient temperature sensor is detected of open circuit or short circuit for 5s successively outdoor ambient temperature sensor malfunction will be reported The unit can automatically resume operation after the malfunction disappears If o...

Page 51: ...hanging malfunction of 4 way valve 4 way valve After the compressor starts operation in heating mode if the outdoor unit detects the difference between evaporator temperature and indoor ambient temperature is lower than the protective value for 10min successively direction changing malfunction of 4 way valve will be reported and the outdoor unit will stop operation The unit can automatically resum...

Page 52: ...temperature sensor error P7 P7 Compressor current protection P5 P5 DC busbar under voltage protection PL PL Compressor startup failure Lc Lc Drive module reset P0 P0 Compressor motor desynchronizing H7 H7 Phase loss Ld Ld Drive to main control communication error P6 P6 IPM protection H5 H5 Compressor overload protection H3 H3 AC current protection input side PA PA Charging circuit error PU PU PFC ...

Page 53: ...45 7 FLOW CHART OF TROUBLESHOOTING 7 1 Troubleshooting Flow Chart of Main Control Malfunction E1 High Pressure Protection ...

Page 54: ...periodically to ensure smooth air return and air outlet E3 stands for three statuses 1 Low pressure protection 2 Refrigerant lacking protection 3 Refrigerant recycling mode 1 If enter refrigerant recycling mode through special operation the displayed E3 is not an error code It will be eliminated when exiting refrigerant recycling mode 2 If you do not want to have refrigerant lacking protection you...

Page 55: ...tween indoor unit and outdoor unit is connected well Check if there is open circuit in the communication wire between indoor unit and outdoor unit Reconnect the communication wire Replace the communication wire Check if the outdoor unit is energized Energize the outdoor unit Replace the mainboard Yes Yes No No No Yes ...

Page 56: ... switch or make sure the float of full water switch works normally Yes F0 Malfunction of Indoor Ambient Temperature Sensor Malfunction of indoor ambient temperature sensor Check if the indoor ambient temperature sensor on mainboard is inserted on the needle stand correctly Disconnect the temperature sensor and measure if its resistance is normal Correctly insert the temperature sensor on the needl...

Page 57: ...re sensor on the needle stand Replace the temperature sensor Replace the indoor mainboard Yes No No Yes F2 Malfunction of Condenser Temperature Sensor Malfunction of condenser temperature sensor Check if the condenser temperature sensor on mainboard is inserted on the needle stand correctly Disconnect the temperature sensor and measure if its resistance is normal Correctly insert the temperature s...

Page 58: ...mperature sensor on the needle stand Replace the temperature sensor Replace the outdoor mainboard Yes No No Yes F4 Malfunction of Discharge Temperature Sensor Malfunction of discharge temperature sensor Check if the discharge temperature sensor on mainboard is inserted on the needle stand correctly Disconnect the temperature sensor and measure if its resistance is normal Correctly insert the tempe...

Page 59: ...51 F5 Malfunction of Wired Controller Temperature Sensor Malfunction of wired controller temperature sensor Replace the wired controller H6 Malfunction of Outdoor Fan Motor ...

Page 60: ...n the mainboard Operate the unit with the new motor Replace the indoor mainboard Yes No No Yes 7 2 Troubleshooting Flow Chart of Drive Malfunction Note For Outdoor Unit Drive Inverter by Single phase Motor P0 Drive module reset P7 IPM or PFC temperature sensor error PA AC current protection input side PC Current sensor circuit error HC PFC protection 48k only P0ǃP7 ˆPA ˆHC or PC is displayed on wi...

Page 61: ...ed zone controller P8 is displayed in the mainboard 88 Indicating light Is the IPM or PFC module of mainboard tightened No Works normally Replace the mainboard Yes Tighten the IPM or PFC module PH DC busbar over voltage protection PL DC busbar under voltage protection ...

Page 62: ...essor current protection H7 Compressor motor desynchronizing H5 IPM protection Ld Phase loss P5 H7 H5 or Ld is displayed in the mainboard 88 indicating light Is the compressor phase sequence right Yes Replace the mainboard Does it work normally No Replace the compressor Work normally Yes adjust the compressor phase sequence Is the compressor wire terminals tightened Tighten the compressor wire ter...

Page 63: ...ndicating light Is the PFC wire tightened or is the sequence right Tighten the PFC wire or adjust the sequence Replace the mainboard Yes No Works normally ee driving board chip error Yes Yes ee is displayed on the wired controller Is the jumper loose Works Normally Tighten the jumper Replace the mainboard No ...

Page 64: ...56 H6 DC fan error ...

Page 65: ...Power supply of fan motor 3 pin Fan GND 4 pin 15V 5 pin Signal control 6 pin NC Interface of DC fan motor 1 pin DC bus voltage 2 pin Suspended 3 pin DC bus GND 4 pin 15V 5 pin Control signal input 6 pin Not connected 5 DC_MOTOR1 DC fan motor1 1 pin Power supply of fan motor 3 pin Fan GND 4 pin 15V 5 pin Signal control 6 pin Signal Feedback Interface of DC fan motor 1 pin DC bus voltage 2 pin Suspe...

Page 66: ...system protection obligate Interface of high pressure protection 12 LPP Low pressure switch for system protection obligate Interface of low pressure protection 13 OVC COMP Compressor overload protection Interface of compressor overload protection 14 T SENSOR2 1 2 pin Tube sensor 3 4 pin Ambient temperature 5 6 pin Air discharge 1 2 pin Case temperature sensor 3 4 pin Ambient temperature sensor 5 6...

Page 67: ...1_1 PFC induction wire brown 3 N Neutral wire input white 4 AC L Live wire input red 5 COMM COMM1 Communication interface 6 JTAG1 Reserved 7 PWR Control power input 8 DC BUS1 Bus electric discharging interface for testing 9 L2 1 PFC induction wire yellow 10 L1 2 PFC induction wire white 11 P OUT Reserved 12 G OUT Reserved 13 W Compressor Phase W 14 V Compressor Phase V 15 U Compressor Phase U ...

Page 68: ...nting Interface No Printing Interface 1 N OUT1 Neutral wire output 1 white only for 18k 2 N OUT Neutral wire output white 3 L OUT Live wire output red 4 E1 Grounding wire 5 E2 Reserved 6 AC L Live wire input red 7 AC N Neutral wire input white ...

Page 69: ... wire input white 4 L2 2 PFC induction wire blue 5 L2 1 PFC induction wire yellow 6 L1 2 PFC induction wire white 7 PWR Control power input 8 JTAG1 Reserved 9 COMM Communication interface 10 DC BUS1 DC bus electric discharging needle stand for testing 11 DC BUS DC bus interface connect to filtering board 12 U Compressor Phase U 13 V Compressor Phase V 14 W Compressor Phase W ...

Page 70: ...ng Interface No Printing Interface 1 N OUT Neutral wire output white 2 L OUT Live wire output red 3 DC BUS DC bus interface connect to drive board 4 AC L Live wire input red 5 N Neutral wire input white 6 E1 Reserved 7 E Grounding wire screw hole ...

Page 71: ...s normal If any measured valve is 0 it indicates the IPM is damaged 7 4 2 Method of Testing PFC Module Short Circuit only for DHR48CSB21S 1 Preparation before test prepare a universal meter and turn to its diode option and then remove the wires L1 2 L2 1 after it is powered off for one minute 2 Testing Steps Step 1 put the black probe on the place P and the red one on the wiring terminal L1 2 L2 1...

Page 72: ...64 DHR48CSB21S 8 WIRING DIAGRAM 8 1 Outdoor unit The actual wiring should always refer to the wiring diagram of the unit Model DHR18CSB21S ...

Page 73: ...65 Model DHR24CSB21S Model DHR30CSB21S ...

Page 74: ...66 Model DHR36CSB21S Model DHR42CSB21S ...

Page 75: ...67 Model DHR48CSB21S 8 2 Indoor unit The actual wiring should always refer to the wiring diagram of the unit 8 2 1 Duct Type Model DHR18NDB21S DHR24NDB21S DHR30NDB21S DHR36NDB21S DHR42NDB21S ...

Page 76: ...68 Model DHR48NDB21S 8 2 2 Floor Ceiling Type Model DHR18NCB21S DHR24NCB21S DHR30NCB21S DHR36NCB21S DHR42NCB21S DHR48NCB21S ...

Page 77: ...69 8 2 3 Cassette Type Model DHR18NKB21S Model DHR24NKB21S DHR30NKB21S DHR36NKB21S DHR42NKB21S ...

Page 78: ...70 Model DHR48NKB21S ...

Page 79: ...71 ...

Page 80: ...Product improvement specifications and appearance in this manual are subject to change without prior notice Johnson Controls Inc USA LIT 12012157 ...

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