Johnson Controls DHM18CMB21S Installation And Maintenance Manual Download Page 17

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DHM42CMB21S

Summary of Contents for DHM18CMB21S

Page 1: ...TER DRIVEN AIR CONDITIONING UNITS READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS INVERTER DRIVEN AIR CONDITIONING UNIT KEEP THIS MANUAL FOR FUTURE REFERENCE OUTDOOR UNIT DHM18CMB21S DHM24CMB21S DHM30CMB21S DHM36CMB21S DHM42CMB21S Model Type 03257 17 ...

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: ... 3 1 Malfunction Indicator 17 3 2 MalfunctionCheckingand Elimination 18 Appendix 41 Appendix 1 Resistance Table of Ambient Temperature Sensor 41 Appendix 2 Resistance Table of Tube Temperature Sensors 42 Appendix 3 Resistance Table of Outdoor Discharge Temperature Sensor 43 2 1 Installation Dimension Diagram 1 1 QWURGXFWLRQ and 6DIHW QVWUXFWLRQV i Customer Service Technical Support 44 ...

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: ...M24CMB21S DHM30CMB21S DHM18CMB21S Warning Be sure to cut off the power supply before cleaning the air conditioning unit otherwise electric shock might happen Wetting of air conditioning unit may cause the risk of electric shock Do not wash the air conditioning unit in any case Volatile liquids such as thinner or gasoline will cause damage to the appearance of air conditioning unit Only use soft dr...

Page 10: ...and then close it after10 seconds Checkall the joints for leaks using liquid soap or an electronic leak device 7 Turn the body of the 2 way and 3 way valves Discon nect the vacuum pump hose 8 Replace and tighten all the caps on the valves INDOOR UNIT Install the drain fitting and the condensate hose for model with heat pump only Condensation is produced and flows from the outdoor unit when the app...

Page 11: ...al installation When picking up and moving the units you must be guided by a trained certified technician Ensure that the recommended space is left around the appliance 30cm Space to the cover or above 30cm 50cm 200cm or more Space to the cover Air inlet side or above or above Space to the wall Air outlet side or above 50cm 30cm Space to the cover or above 30cm 50cm 200cm or more Space to the cove...

Page 12: ... the handle at the right side plate of the outdoor unit six screws Remove the cable clamp connect the connection cable and power cable with the terminal at the row of connection and fix the connection The fitting line distributing must be consistent with the indoor unit terminal of line bank Wiring should meet that of indoor unit Fix power connection wire with wire clamp Ensure wire has been secur...

Page 13: ...rrespond to each other respectively The appliance shall be installed in accordance with national and local wiring regulations Do not install the outdoor unit where it is exposed to the sun To the power supply To unit B To unit A cable connection connection cable To unit C connection cable Outdoor unit Indoor unit L1 L2 L1 L1 L2 L2 Powercable A B C connection cable connection cable connection cable...

Page 14: ... national and local wiring regulations Do not install the outdoor unit where it is exposed to the sun HANDLING DHM30CMB21S To the power supply To unit B To unit A connection cable connection cable To unit C connection cable To unit D connection cable Outdoor unit Indoor unit L1 L2 L1 L1 L2 L2 Powercable A B C D connection cable connection cable connection cable connection cable 1 The power cable s...

Page 15: ...voltage specified on the nameplate The unit may break down or the components may be burned out Are the lines and pipelines correctly installed The unit may break down or the components may be burned out Has the unit been safely grounded Are the models of lines in conformity with requirements The unit may break down or the components may be burned out Are there any obstacles near the air inlet and ...

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Page 20: ...35 18 Φ12 7 Φ6 35 21 24 Φ15 9 Φ9 52 Allowable Length DHM42CMB21S 80 25 15 7 5 Pipe Flare Nut Ordinary b a e d c L4 L3 L2 L5 L1 Outdoorunit Height difference between indoor unit and outdoor unit H1 Height difference between indoor units H2 Indoor unit Indoor unit Equivalent length of the farthest fitting pipe Lx 7DEOH 3LSLQJ EHWZHHQ WKH QGRRU DQG 2XWGRRU 8QLWV 5HIHU WR LJ IRU WKH WRUTXH IRU WLJKWHQ...

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Page 23: ...DHMW18NDB21S 7DEOH QGRRU 8QLW 7DEOH LTXLG 5HIULJHUDQW 3LSH 7KH WRWDO OHQJWK RI HDFK OLTXLG UHIULJHUDQW SLSH LV H G F E D P 7KXV WKH PLQLPXP DGGLWLRQDO UHIULJHUDQW FKDUJH î NJ 1RWH QR DGGLWLRQDO UHIULJHUDQW LV QHHGHG IRU WKH OLTXLG SLSH ZLWKLQ P GGLWLRQDO 5HIULJHUDQW KDUJH 5HFRUG WHPV WR EH FKHFNHG DIWHU WKH QVWDOODWLRQ No Indoor Unit Model Additional Refrigerant Charge kg 1 2 N Total Refrigerant P...

Page 24: ...there any obstacle at the air inlet outlet of the indoor outdoor unit The cooling heating capacity may be poor Have the length of the refrigerant pipe and the refrigerant charge been recorded It may be hard to know the exact refrigerant charge 7ULDO 5XQQLQJ KHFN EHIRUH WKH 7ULDO 5XQQLQJ D KHFN LI WKH DSSHDUDQFH RI WKH XQLW DQG WKH SLSLQJ V VWHP DUH GDPDJHG GXULQJ WKH WUDQVSRUWDWLRQ E KHFN LI WKH Z...

Page 25: ...rotection Ƽ 22 Complete unit frequency dropping protection Ƽ 23 Unit A frequency restriction or frequency dropping protection Ƽ Ƽ 24 Unit B frequency restriction or frequency dropping protection Ƽ Ƽ 25 Unit C frequency restriction or frequency dropping protection Ƽ Ƽ 26 Unit D frequency restriction or frequency dropping protection Ƽ Ƽ Ƽ 27 Outdoor ambient temperature sensor protection 28 Outdoor t...

Page 26: ...valve malfunction Ƽ Ƽ 57 Unit C communication wire misconnection or expansion valve malfunction Ƽ 58 Unit D communication wire misconnection or expansion valve malfunction Ƽ 1 IPM protection malfunction Main checking point If the input voltage of the unit is within normal range If the connection wire of compressor is connected well Is it loose If the connection sequence is correct If the resistanc...

Page 27: ...unit to operate Test the resistance between the three phases Reconnect the wire of the compressor according to the correct wiring method If the resistance is normal If the resistance is above 500M Replace the compressor Replace the outdoor mainboard Please check 1 if the indoor and outdoor heat exchanges are dirty if there is obstacle to affect the radiation 2 if the indoor and outdoor fans are ru...

Page 28: ...ed well and if the induction is broken Flow chart Start Check If the power supply is normal Power supply is abnormal yes yes yes no no no Check if the outdoor induction is broken The induction is broken Replace the induction Replace the outdoor mainboard Malfunction is eliminated End Turn on the unit after the power supply resumes to normal situation ...

Page 29: ...etweenthetwo ends of the electrolytic capacitor with the DC shift of the universal meter The voltage is above 100V yes yes yes no no no The detection circuit of the outdoor mainboard has malfunction Replace the out door mainboard Checkiftheinductionwiringisloose ortheinductioniscutoff The induction is cut off or the wiring is loose Replace the induction or reconnect the loose wire Malfunction is e...

Page 30: ...hart Start If the outdoor ambient temperature is above 53ć yes yes yes no no no It is a normal protection please operate the unit after the outdoor ambient temperature has changed If the indoor and outdoor radiation is insufficient Improve the radiation environment of the unit Iftheoutdoorfanisworkingnormally Check if the terminal of the fan is connected well if the fan is broken Replace fan capac...

Page 31: ...ion Check whether the temperature senspr is normal according to resistance table Replace the temperature sensor with the same model Replace the controller with the same model End Eliminate the malfunction 5 Temperature sensor malfunction Main checking points ƽ If the temperature sensor is damaged or broken ƽ I f the terminal of the temperature sensor is loosended or not connected ƽ I f the mainboa...

Page 32: ...than 3min no no no no no no yes yes yes yes yes yes If the connection wire of the compressor is connected well and correctly Eliminate the malfunction Reconnecttheconnectionwire ofthecompressoraccording to the wiring diagram If the refrigerant charging amount is too much Charge the refrigerant according to the service manual Eliminate the malfunction Eliminate the malfunction Replace the compresso...

Page 33: ...tion malfunction of some indoor units De energize check the connection wire of indoor and outdoor unit and the wire of the eletric box is connected correctly no no no Connected correctly Reconnect according to the wiring diagram yes yes yes De energize change the communication wire of the well communicated indoor unit and malfunction indoor unit then energize the unit and wait for 3 min The malfun...

Page 34: ...ed correctly Connected correctly Reconnect according to the wiring diagram Connected correctly Reconnect according to the wiring diagram De energize check if the connection wire between the outdoor mainboard and the filter board according to the wiring diagram The connection wire is broken Replace the connection wire Check if there is power input bewtweenthenetrualwireandlive wire of the outdoor m...

Page 35: ...elow 1k If the wiring of the eletric expansion valve is coonected well Replace the overload protector Check the coil of the eletric expansion valve replace it if it is broken Eliminate the malfunction Reconnect according to the wiring diagram Check the refrigerant status if there is refrigerant leakage recharge it according to the service manual Note The detection method of the coil of the eletric...

Page 36: ...iminate the malfunction Eliminate the malfunction Eliminate the malfunction Replace the compressor End no no no no no no yes yes yes yes yes yes Replace outdoor mainboard The unit appears desynchronizing as soon as energizing and starting The stop duration of the compressor is longer than 3min The wiring of the compressor is connected properly Reconnect the wire properly The eletric expansion valv...

Page 37: ...troller Opened door and window Close the door and window Direct sunlight Hang a curtain or blinds over the window Too many people in the room Too many heat sources in the room Reduce the heat sources 51 1 ķ Q WKH HYHQW RI DEQRUPDO FRQGLWLRQV an odor SOHDVH VKXW RII WKH PDLQ SRZHU VXSSO LPPHGLDWHO DQG WKHQ FRQWDFW your contractor RWKHUZLVH WKH FRQWLQXRXV DEQRUPDO UXQQLQJ ZRXOG GDPDJH WKH DLU FRQGLW...

Page 38: ...n of the electronic expansion valve The unit swishes during the cooling operation It is the sound when the refrigerant gas runs inside the unit r o d e t r a t s s i t i n e h w s e h s i w s t i n u e h T stopped It is the sound when the refrigerant gas stops running The unit swishes when it is in and after the running It is the sound when the draining system is operating The unit squeaks when it...

Page 39: ...rror Hc Flash 6 times Hc Hc Drive Error Startup Failure Lc Flash 11 times Lc Lc Drive Error DC Fan Motor Error LA Outdoor Phase Loss Ld Flash 3 times Flash 3 times Flash 3 times Ld Ld Drive Error Compressor Stalling LE Flash 3 times Flash 3 times Flash 3 times LE LE Drive Error Over Speed LF Flash 3 times Flash 3 times Flash 3 times LF LF Drive Error IPM Reset P0 Flash 3 times Flash 3 times Flash ...

Page 40: ...it pipe outlet temperature sensor error See Table 16 Flash 22 times b7 b7 Indoor Liquid Valve Unit n indoor pipe inlet temperature sensor error See Table 16 Flash 19 times b5 b5 Indoor See Table 16 Flash once F1 F1 Indoor See Table 16 Flash 7 times E7 E7 Indoor Error Item Outdoor Unit 88 Display Indicating LED Flashing Times 88 Display Wired Controler Display Error Type Running LED Cooling LED Hea...

Page 41: ...times LA LA Outdoor Phase Loss Ld Ld Ld Drive Error Compressor Stalling LE LE LE Drive Error Over Speed LF LF LF Drive Error IPM Reset P0 P0 P0 Drive Error Compressor Current Protection P5 Flash 15 times P5 P5 Drive Error Communication Error between the Inverter Drive and the Main Controller P6 Flash 16 times P6 P6 Drive Error Radiator Temp Sensor Error P7 Flash 18 times P7 P7 Drive Error Radiator...

Page 42: ...ure sensor error 24 Unit B indoor pipe inlet temperature sensor error 34 Unit C indoor pipe inlet temperature sensor error 15 Unit A indoor ambient temperature sensor error 25 Unit B indoor ambient temperature sensor error 35 Unit C indoor ambient temperature sensor error 16 26 36 17 Unit A anti freezing protection 27 Unit B anti freezing protection 37 Unit C anti freezing protection 41 Unit D com...

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Page 44: ...door unit mainboard Replace pressure switch Check if operation mode of indoor unit is properly set N N Y Y Y Y Check if gas valve and liquid valve are completely open Refer to Instruction Manual of indoor unit Check if the panel of outdoor unit is firmly closed N N Completely open the valve Close the panel Check if the air return and supply from heat exchanger of indoor unit and outdoor unit is sm...

Page 45: ... run Check if swing louver of indoor unit is completely open Check if there is filth blockage to indoor outdoor filter or heat exchange fin System pipeline is blocked Mainly check the inlet and outlet of main pipe connecting with each indoor unit and capillary of indoor and outdoor units Replace the parts like filter capillary and so on Refer to Care and Maintenance Measure swing motor and signal ...

Page 46: ... Replace the outdoor unit mainboard Replace relevant discharge temperature sensor Discharge temperature protection ƹ Malfunction Display E5 Compressor Overheat N Y Y Y Y Y N N N Check if compressor s connection line is properly connected Adjust compressor s connection line Check if current value is higher than the protector s setting Replace overcurrent protector If unit s high pressure is normaR ...

Page 47: ...eck if the condensate pipe is jammed or if water flows smoothly Y Clear the water from pipe Adjust water drainage in pipe Check if the voltage of water drainage pump end is ok Full Water Protecti on ƹ Malfunction Display F2 Failure of Evaporator Temp Sensor Check if the plug of the temperature sensor is correctly connected with socket on the mainboard N Removethe sensor to check if the resistance ...

Page 48: ... is ok Replace mainboard of the indoor uint Replace temperature sensor Check the direction of the plug and socket ƹ Malfunction Display F5 Failure of Exhaust Temp Sensor N N Y Y Y Failure of Exhaust Temp sensor Check if the plug of the temperature sensor is correctly connected with socket on the mainboard Remove the sensor to check if the resistance value is ok Replace mainboard of the indoor uint...

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Page 53: ... Johnson Controls Inc USA LIT 12012176 Product improvement specifications and appearance in this manual are subject to change without prior notice ...

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