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Service Manual SM-MDS_(ii)

69

E8

General system failure



High pressure malfunction occur 3 times within 1 hour

-  outdoor unit motor broken (cooling)
-  outdoor circulating air short (cooling)
-  outdoor heat exchanger too dirty (cooling)
-  outdoor ball valve not open
-  indoor circulating air short (heating)
-  indoor heat exchanger too dirty (heating)
-  indoor unit filter web blocked (heating)
-  indoor unit EXV not turn on properly (heating)
-  too much refrigerant
-  outdoor unit PCB high pressure output port malfunction
-  pressure sensor broken
-  pressure switch broken



Low pressure malfunction occur 3 times within 1 hour

-  outdoor ball valve not open
-  refrigerant leakage or shortage
-  outdoor unit PCB low pressure output port malfunction
-  low pressure sensor broken



Too high discharge temperature occur once

-  outdoor unit motor broken (cooling)
-  outdoor circulating air short (cooling)
-  outdoor heat exchanger too dirty (cooling)
-  outdoor unit EXV not turn on properly (heating)
-  indoor unit EXV not turn on properly
-  refrigerant leakage or shortage
-  outdoor ball valve not open



Compressor overload protector shut and occurs 3 times

- too much current flow in the compressor
- compressor overload protector protecting value wrongly set

80

H1

High pressure trip



Outdoor motor broken (cooling)



Outdoor circulating air short-circuit (cooling)



Outdoor heat exchanger too dirty (cooling)



Outdoor ball valve not open



Indoor circulating air short-circuit (heating)



Indoor heat exchanger too dirty (heating)



Indoor unit filter blocked by dirt (heating)



Indoor EXV not on properly (heating)



Refrigerant over charged



Outdoor PCB high pressure output port abnormal



Pressure sensor broken



Pressure switch broken

78

H2

Digital scroll
compressor overload



Digital compressor operating current too high, overload protector on

77

H3

Fixed scroll compressor
overload



Fixed scroll compressor operating current too high, overload protector on

L1

Low pressure trip



Outdoor ball valve not open



Outdoor heat exchanger efficiency too low when heating



Outdoor motor run abnormally when heating



Refrigerant leakage or insufficient



Outdoor PCB low pressure output port abnormal



Low pressure sensor broken

78

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Summary of Contents for MDS030A

Page 1: ...Service Manual SM MDS_ ii M Mu ul lt ti i D Di ig gi it ta al l S Sc cr ro ol ll l S Sy ys st te em m Engineered for flexibility and performance TM...

Page 2: ......

Page 3: ...ust satisfy him herself regarding the applicability of any article and seek professional evaluation of all materials McQuay disclaims any responsibility for actions based on this document McQuay is a...

Page 4: ...it PCB 14 3 2 MDS Indoor Unit PCB 16 3 3 MDS System Wiring 18 3 3 1 Wiring connection between MDS outdoor to indoor units 18 3 3 2 Wiring connection between MDS outdoor units 20 3 3 3 Wiring connectio...

Page 5: ...rror Code for MDS M PCB 70 6 6 Troubleshooting Flow Chart 73 7 0 Appendix 90 7 1 Compatibility Chart for Indoor and Outdoor PCB 90 7 2 Compatibility Chart for Wired Handset MC301 91 7 3 Pressure Senso...

Page 6: ...ow chart for possible root cause to do necessary repair maintenance and troubleshooting task for the MDS air conditioner system This service manual is intended for and should only be used by qualified...

Page 7: ...S 5MDS 050B R 1 R410A 5MDS 060B R 1 R410A 5MDS 070B R 1 R410A 5MDS 080B R 1 1 R410A 5MDS 100B R 1 1 R410A 5MDS 120B R 1 1 R410A 5MDS 140B R 1 2 R410A 5MDS 160B R 1 2 R410A 5MDS 180B R 1 2 R410A 5MDS...

Page 8: ...ulate the refrigerant flow according to the total indoor capacity required 3 When the total indoor capacity exceeds the maximum capacity of Digital Scroll Compressor Fix Scroll Compressor will turn ON...

Page 9: ...mum Indoor Quantity MDS 030A R 5 MDS 040A R 6 MDS 050A R 5MDS 050B R 8 MDS 060A R 5MDS 060B R 9 MDS 070A R 5MDS 070B R 11 MDS 080B R 5MDS 080B R 13 MDS 100B R 5MDS 100B R 16 MDS 120B R 5MDS 120B R 16...

Page 10: ...valent length from first branch to furthest unit 25 30 40 25 30 65 Height Between further indoor and outdoor outdoor above 20 30 50 20 30 50 indoor above 20 30 40 20 30 40 Maximum height between indoo...

Page 11: ...Service Manual SM MDS_ ii 5 Dimension of refnet model MDS Y5 A MDS Y6 A and MDS Y7 A Distributor MDS C1 Distributor MDS C2 and MDS C3 1...

Page 12: ...EX 24 3SAP C MEX 22 3SAP C MCCD 010C 1 4 1 4 MCCD 015C 1 4 1 4 MCCD 020C 1 4 1 4 MCCD 025C 3 8 1 4 MEX 18 3SAP C MEX 22 2SAP C MCCD 028C 3 8 MEX 22 3SAP C MCCD 030C 3 8 3 8 MEX 24 3SAP C MEX 22 3SAP C...

Page 13: ...ystem and Control General Circuit Diagram General outdoor circuit diagram for cooling mode General outdoor circuit diagram for heating mode Note For more detailed refrigerant circuit diagram please re...

Page 14: ...between TH9 and TH10 is normally about 8 to 12 C cooling mode For example when the difference between TH9 and TH10 is very low EXV4 will increase its opening step to maintain the sub cool circuit Defr...

Page 15: ...Scroll Compressor Compressor overload protection Fan motor overload protection Others For Fix Scroll Compressor Minimum 3 minutes of start up delay protection is available For Digital Scroll Compresso...

Page 16: ...efers to different EXV opening size For example if the indoor unit requires more cooling the EXV steps will increase to allow more refrigerant to flow into the indoor Fan Speed Control The table above...

Page 17: ...nstaller should take note Refer to the figures below after the installation of distributor the piping should directly connect to indoor unit and cannot be connected to other refnet or distributor This...

Page 18: ...room temperature Tr by 0 5 C the heater will be turned ON Ts Tr 0 5 When the set temperature Ts is lower than room temperature Tr by 1 C the heater will be turned OFF Ts Tr 1 2 Heater Tr Ts 0 5 1 1 0...

Page 19: ...e piping Stick the seal material to cover the inlet of the ball valve flange to avoid the dirt entry Change the hollow seal pad Fix the flange connector and hollow seal pad and fixed ball valve of gas...

Page 20: ...PRESS 9 OD Outdoor ambient sensor 25 To LIVE 10 RTN Return air temperature sensor 26 TO NEUTRAL 11 C_BTM Compressor bottom sensor 27 PCB VERSION 12 INLET Inlet coil temperature sensor 28 7 Segment LED...

Page 21: ...TH12 Return air temperature sensor 12 LO FAN TH11 SCC bypass sensor HI FAN TH10 After SCC sensor 4WV Four way valve TH9 Before SCC sensor 13 PWM Pulse Width Modulation 18 TH8 Outdoor ambient sensor TH...

Page 22: ...coil temperature 5 Dipswitch 2 SW2 12 Apc Bpc Centralize Control 6 Dipswitch 3 SW3 13 Ain Bin Outdoor Communication 7 PCB Software Version 14 T_Room Room temperature 8 MC200 C 15 Display Board IR Rece...

Page 23: ...emperature 17 Swing T_MID Midlet coil temperature 18 Pump T_OUT Outlet coil temperature 19 Fan Motor HI FAN MI FAN LO FAN 8 MC301 Wired Hanset Connector 20 LIVE 9 Display Board IR Receiver 21 NEUTRAL...

Page 24: ...t not exceed 1000m 3 3 1 Wiring Connection Between MDS Outdoor to Indoor Units As the MDS system is a single outdoor multiple indoors system it is required to have communication wiring between the out...

Page 25: ...PCB to terminal block Current models are having the label of Ain and Bin on the terminal block However older model has different terminal number as shown below Connect the wire accordingly Ain outdoo...

Page 26: ...munication jumper is labeled with the name JP1 and the location is shown below Location of jumper JP1 on indoor PCB MC200 C left and MC201 C right 3 3 2 Wiring Connection Between MDS Outdoor Units Whe...

Page 27: ...al Number for Bin 5MDS120 180BM BRM 30 31 5MDS240 250BM BRM 45 46 R410A Model Slave Unit Terminal Number for Apc Terminal Number for Bpc 5MDS140 160 180BS BRS 32 33 5MDS200 220 240 250BS BRS 47 48 Not...

Page 28: ...ctivate the automatic air swing function Press again to stop the louver at the desired direction 6 Ionizer Function For WM G series only Press button to activate the negative ion function which will r...

Page 29: ...Button 11 Timer Cancel 12 OFF Timer Setting 13 ON Timer Setting 14 Turbo Function Press for fast cooling Fan speed turn to maximum speed Press again to deactivate the function 15 Clock Time Setting P...

Page 30: ...kling Press again to change mode as follows When the outdoor unit is OFF Heat pump COOL HEAT FAN DRY Cooling only COOL FAN DRY When the outdoor unit is Cooling COOL FAN DRY When the outdoor unit is He...

Page 31: ...WEEK SET and TIMER SET will display on the left and bottom of LCD panel press or to select a day Sunday to Saturday press TIMER again the day is selected the timer s states of the selected day will di...

Page 32: ...nel show _ _ press ENTER to confirm enter group setting 4 ON OFF Operation Press ON OFF key to RUN or STOP the unit operation For Group On Off press ON OFF key for 5s and the unit number is twinkling...

Page 33: ...OFF When the unit is OFF it can only be set to TIMER ON the TIMER SET will display on LCD panel press to set hour and press to set minute press TIMER to finish the single timer setting B Week Timer Se...

Page 34: ...ontroller to indoor units through the orange connector Apc and Bpc through daisy chain connection One end of the screen layer should be earthed to protect the signal transmission Kindly refer to the f...

Page 35: ...connected from the gateway to serial port and a manual 4 2 Hardware Requirement The hardware requirements for Smart Commander are as follow The CPU main frequency is 800MHz or above The memory is 256...

Page 36: ...d follow the instruction on the prompt up screen Once the software installation is completed the prompt up screen will disappear In order to confirm whether the software is already installed or not th...

Page 37: ...ly For certain models the outdoor terminal will be labeled with numbers instead of Apc and Bpc The corresponding numbers for Apc and Bpc are as follow R22 Model Terminal Number for Apc Terminal Number...

Page 38: ...USB converter cable can be use This converter cable can be obtained from any IT hardware outlet When user purchased the RS232 to USB converter cable it will come together with a CD which consist the d...

Page 39: ...step 6 and set COM 1 as your port number If you are using the Serial port to USB converter cable please go through all the following steps The steps will be quite complicated Hence kindly read through...

Page 40: ...unication port COM on each laptop will be different If the COM port is less than 10 jump to step 6 and continue setting up the Smart Commander If the COM port goes more than 10 kindly follow the next...

Page 41: ...s finished initiated the user will need to set the COM port setting To do this please go to Function E and select Parameter Setting Step 8 A new window will prompt up for parameter setting To change t...

Page 42: ...connect to the system Go to drop down menu Function E again and select Initiating to connect to the MDS system Once the software is connected to the system all available parameter of the system Indoor...

Page 43: ...ircuit Monitor Window in Smart Commander If the MDS units are connected in a network user can observe all parameter of outdoor unit through the outdoor set address in the PCB Once the outdoor is selec...

Page 44: ...TH Temperature sensor reading Unit C TH1 Compressor discharge TH2 Outdoor 1 condenser coil inlet TH3 Outdoor 1 condenser coil midlet TH4 Outdoor 2 condenser coil inlet TH5 Outdoor 2 condenser coil mi...

Page 45: ...or Unit Control and Monitoring When using the Smart Commander the user can activate the indoors via the software This allows troubleshooting to be carried out easily without the needs to go to the ind...

Page 46: ...or is connected to If there is no outdoor address set the default value will be 0 Indoor No The address set on the indoor This is based on the PCB setting Name The indoor model and capacity Version Th...

Page 47: ...ious page of the graph Next page Proceed to next page of the graph End page Proceed to the last page or the graph Set Param A new window will prompt out allowing user to determine which parameter to p...

Page 48: ...ambient is set at 6 C User is only allowed to change the suction temperature The allowable range is from 2 C to 15 C Default value is 6 C Defrost curve B point The outdoor ambient is set at 15 C User...

Page 49: ...ich is the refrigerant temperature before sub cool circuit TscT1 TscT2 TscT3 is the Sub cool target temperature the system needs to achieve The actual sub cool temperature will be based on TH9 TH10 Ex...

Page 50: ...C If indoor coil middle temperature is too low outdoor will increase capacity to achieve the set value Beside the Modify Outdoor Unit Parameter there is another button called Special Order Once the bu...

Page 51: ...low These steps help to streamline the possible problem that may occur during commissioning The flow chart below provides a general guide line for commissioning MDS system This is useful whether for f...

Page 52: ...After obtaining the design drawing and report we will need to check on the piping and wiring connection Although this should be done during installation it is better to check all items again before co...

Page 53: ...ion into a report From the report itself the proposed additional amount of refrigerant required are stated in the report Additional charge required Manual calculation To use this method the user is re...

Page 54: ...ch 1 SW1 1 2 3 4 5 6 ON 1 OFF 0 Reserved Auxiliary Heater 1 2 Water Pump S1 Dipswitch 1 SW1 is to determine the special function of the indoor unit There are 2 main special functions that can be speci...

Page 55: ...20 1 0 1 1 0 0 44 0 1 0 1 0 1 21 1 0 1 1 0 1 45 0 1 0 1 1 0 22 1 0 1 1 1 0 46 0 1 0 1 1 1 23 1 0 1 1 1 1 47 While setting the indoor address there are a few rules need to follow The rules are as follo...

Page 56: ...0 Ceiling Convertible 0 1 1 Wall Mounted 1 0 0 Ducted Blower Example 1 ON 0 OFF S3 1 S3 8 MWMD015G 1 ON 0 OFF S3 1 S3 8 MCKD020A C 1 ON 0 OFF S3 1 S3 8 MCCD050C 1 ON 0 OFF S3 1 S3 8 MCMD028E Dipswitch...

Page 57: ...are as follow 1 Press the indoor PCB emergency ON OFF button for 5 seconds to go into setting mode When the unit are in setting mode all the LED of the indoor will be light up 2 Use the wireless hands...

Page 58: ...dipswitch 1 J1 2 Set up dipswitch 2 J2 3 Set up indoor quantity K2 and K1 button Set up Dipswitch 1 J1 0 For outdoor unit which runs on MDOM PCB there are 2 set of dipswitches J1 and J2 Besides this t...

Page 59: ...the same rules on the indoor setting apply here The rules are as follow a Each outdoor number must be unique The outdoor address cannot duplicate b The first outdoor address must be 0 Do not start the...

Page 60: ...0755 and press K2 the PCB will enter to setting mode 8 The available setting to adjust are as follow a Indoor Quantity b Temperature to initiate defrost checking c Temperature to initiate defrost cycl...

Page 61: ...ump 1 Cooling only S1 1 MODEL 0 MDS B Series 1 MDS A Series S1 2 MODEL 0 Heatpump 1 Cooling only S1 3 S1 4 S1 5 S1 6 S1 7 S1 8 Indoor Quantity S1 3 S1 4 S1 5 S1 6 S1 7 S1 8 Indoor Quantity 0 0 0 0 0 0...

Page 62: ...The rules are as follow a Each outdoor number must be unique The outdoor address cannot duplicate b The first outdoor address must be 0 Do not start the first outdoor with address 1 c While setting th...

Page 63: ...ailable it is advisable to use it to run the commissioning Connect the outdoor unit to the commissioning software accordingly refer to Section 4 4 and run it Go to drop down menu Function E and select...

Page 64: ...eadings of each information will continuously being displayed on the 7 segment LED display from 0 to 9 For example if we need to check the ambient temperature reading number 1 wait for the display to...

Page 65: ...the opening of the EXV box and ensure it is functioning normally Check is there any error code from the indoor unit 5 9 Monitor Outdoor Parameter After the commissioning personnel added in the additi...

Page 66: ...ceiling concealed the error code will display on controller screen For outdoor unit the error code generated will display on the 7 segments display on outdoor PCB Each of these locations is indicated...

Page 67: ...short circuit Indoor and outdoor PCB program not compatible Indoor and outdoor PCB abnormal Error Code 2 Description Possible causes Cool Heat Sleep Fan Time Dry OFF OFF BLINKING Indoor sensor error...

Page 68: ...run abnormally when heating Refrigerant leakage or insufficient Outdoor PCB low pressure output port abnormal Low pressure sensor broken Error Code 7 Description Possible causes Cool Heat Sleep Fan T...

Page 69: ...y heating indoor unit EXV not turn on properly refrigerant leakage or shortage outdoor ball valve not turns on Compressor overload protector shut and occurs 3 times too much current flow in the compre...

Page 70: ...controller communication wire not connected or loose Wired controller broken Outdoor PCB broken 83 F7 Ambient temperature exceed running range Outdoor ambient temperature exceed running range 1 cooli...

Page 71: ...r too dirty heating Indoor unit filter blocked by dirt heating Indoor EXV not on properly heating Refrigerant over charged Outdoor PCB high pressure output port abnormal Pressure sensor broken Pressur...

Page 72: ...e sensor TH4 broken or loose 15 TH5 open short circuit slave unit 2 midlet coil Slave unit 2 midlet coil temperature sensor TH5 broken or loose 18 TH8 open short circuit slave unit ambient temperature...

Page 73: ...dirty cooling Slave unit ball valve not open Indoor circulation air short circuit heating Indoor heat exchanger too dirty heating Indoor unit filter blocked by dirt heating Indoor EXV not switched on...

Page 74: ...Indoor X and outdoor PCB program not compatible Indoor X and outdoor PCB abnormal E0 Discharge temperature sensor malfunction Outdoor discharge temperature sensor broken or loose 73 E1 Outdoor ambient...

Page 75: ...n properly refrigerant leakage or shortage outdoor ball valve not open Compressor overload protector shut and occurs 3 times too much current flow in the compressor compressor overload protector prote...

Page 76: ...compressor 1 overload Fixed compressor 1 operating current too high overload protector OL1 on ER50 Fixed compressor 2 overload Fixed compressor 2 operating current too high overload protector OL2 on...

Page 77: ...hut and occurs 3 times too much current flow in the compressor compressor overload protector protecting value wrongly set 80 ER56 Discharge temperature is too high Outdoor motor broken cooling Outdoor...

Page 78: ...H8 temperature sensor failure Outdoor ambient temperature sensor TH8 broken or loose ER72 TH9 temperature sensor failure Outdoor outlet coil temperature sensor TH9 broken or loose ER73 TH10 temperatur...

Page 79: ...5 11 to 1C For MC301 E0 to E6 For MDOM PCB ER64 to ER75 For MDS M PCB Remark OD ID Spec PCB Outdoor Indoor Specification Control Module Control Board Is the sensor correctly connected Connect correctl...

Page 80: ...Is the wire connection to pressure sensor broken Replace the wire and restart the system NO YES Replace PCB Turn off the unit Is the resistance of the pressure sensor normal Refer Appendix 7 3 NO Rep...

Page 81: ...it Check the indoor pump Is it functioning normally YES Check the drain hose and pump for blockage Clean it and restart the system NO NO YES Replace the water level switch Check the water level switch...

Page 82: ...on wire Is A B reversed YES Reverse the communication wire and restart the system Is communication wire too long Should not exceed 1000m Reduce the length of the communication wire and restart the sys...

Page 83: ...MDS M PCB Is the overload protector current setting correct Refer wiring diagram Reset and restart the system YES NO Replace overload protector and restart the system Turn off the unit Is the refrige...

Page 84: ...c YES Is the coil sensor and pressure sensor resistance characteristics normal Refer Appendix 7 3 7 5 Replace sensor YES Replace PCB NO YES NO Check on power supply and wiring connection Replace outdo...

Page 85: ...YES NO Replace PCB Turn off the unit Is the communication wire broken or loose YES Replace the wire and restart the system NO Is the DIP switch setting on PCB correct NO Reset the setting and restart...

Page 86: ...on coil and filter Connect correctly and operate again Sufficient airflow YES NO Is the coil sensor and pressure sensor resistance characteristics normal Refer Appendix 7 3 7 5 NO Replace sensor YES...

Page 87: ...Measure compressor winding resistance Within spec YES NO YES Measure suction pressure Within spec Release or charge the unit with refrigerant according to specification YES NO Replace PCB NO Is the c...

Page 88: ...r MC301 ER54 For MDS M PCB Examine the PCB for loose components Solder the loose component back and retest again NO Turn off the unit YES Replace PCB Turn on the unit Press the reset button Error stil...

Page 89: ...wired controller Turn on the unit Is the error remains NO Restart the system and verify again YES Replace PCB Turn off the unit Is the version of controller compatible with the indoor PCB Refer Append...

Page 90: ...for advice as condition is not suitable for the unit to operate NO YES Check the surrounding of units Any obstacle that blocks the air movement YES NO Replace PCB Turn off the unit Check the resistanc...

Page 91: ...ii 85 Wired controller storage problem Error Code FA For MC301 Press the reset button on the wired controller Is the error still exists Restart the system and verify again YES NO Replace wired control...

Page 92: ...Recharging with correct amount of refrigerant NO Measure suction pressure Within spec NO Is the sensors resistance characteristics normal Refer Appendix 7 3 7 5 NO Replace sensor YES YES YES Is the se...

Page 93: ...arge Is it within specification NO Replace sensor and restart the system YES NO YES Find the root cause for communication error and solve it Restart the unit Restart the unit Recharge refrigerant acco...

Page 94: ...sensor and pressure sensor correctly connected NO Replace an outdoor PCB and re program the PCB Turn off the unit Check the connector on outdoor PCB Refer Appendix 7 6 Is there any connection Add the...

Page 95: ...ERSE For MDS M PCB Check whether the outdoor PCB is faulty If yes replace a new PCB YES Is the sensor and pressure sensor correctly connected NO Correct the dipswitch and restart the unit Turn off the...

Page 96: ...ility Chart for Indoor and Outdoor PCB MDOM PCB Outdoor with MC200 C MC201 C PCB Indoor MDS M PCB Outdoor with MC200 C MC201 C PCB Indoor MDS M PCB R410A Outdoor with MC200 C MC201 C PCB Indoor Legend...

Page 97: ...compressor discharge piping where the piping for master and slave merge 3 When replacing outdoor PCB V2 3 and below with V2 4 and above for R22 MDS B model outdoor capacity dipswitch setting may be d...

Page 98: ...92 Service Manual SM MDS_ ii 7 3 Pressure Sensor Voltage and Resistance Value High pressure sensor 7...

Page 99: ...Service Manual SM MDS_ ii 93 Low pressure sensor 7 4 Character Reference for 7 Segment LED 7...

Page 100: ...94 Service Manual SM MDS_ ii 7 5 Temperature Sensor Resistance Value Remark Exclude discharge temperature sensor TH1 and ambient temperature sensor TH8 R25 C 10K 1 7...

Page 101: ...Service Manual SM MDS_ ii 95 7 6 Hardware Configuration for 5MDS Outdoor Remark The marked wire should be connected only for R410A MDS model on outdoor MDS M PCB 7...

Page 102: ...96 Service Manual SM MDS_ ii 7 7 R22 MDS A Series Cooling Cycle Reference 7...

Page 103: ...Service Manual SM MDS_ ii 97 7...

Page 104: ...98 Service Manual SM MDS_ ii 7 8 R22 MDS B Series Cooling Cycle Reference 7...

Page 105: ...Service Manual SM MDS_ ii 99 7...

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Page 108: ...102 Service Manual SM MDS_ ii 7 9 R22 MDS A Series Heating Cycle Reference 7...

Page 109: ...Service Manual SM MDS_ ii 103 7...

Page 110: ...104 Service Manual SM MDS_ ii 7...

Page 111: ...Service Manual SM MDS_ ii 105 7 10 R22 MDS B Series Heating Cycle Reference 7...

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Page 113: ...Service Manual SM MDS_ ii 107 7...

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Page 115: ...Service Manual SM MDS_ ii 109 7 11 R410A MDS B Series Cooling Cycle Reference 7...

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Page 117: ...Service Manual SM MDS_ ii 111 7...

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Page 119: ...Service Manual SM MDS_ ii 113 7...

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Page 121: ...Service Manual SM MDS_ ii 115 7...

Page 122: ...116 Service Manual SM MDS_ ii 7 12 R410A MDS B Series Heating Cycle Reference 7...

Page 123: ...Service Manual SM MDS_ ii 117 7...

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Page 125: ...Service Manual SM MDS_ ii 119 7...

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Page 129: ...Service Manual SM MDS_ ii 123 7 13 R22 MDS BHC Series Cooling Cycle Reference 7...

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Page 131: ...Service Manual SM MDS_ ii 125 7...

Page 132: ...126 Service Manual SM MDS_ ii For Master Slave Combination MDS220 280BHC please refer to the base model for reference 7...

Page 133: ...Service Manual SM MDS_ ii 127 7 14 Refrigerant Circuit Diagram MDS 30 40 50 60A MDS 70A 7...

Page 134: ...128 Service Manual SM MDS_ ii MDS 30 40 50 60AR MDS 70AR 7...

Page 135: ...Service Manual SM MDS_ ii 129 MDS 80 100 120B MDS 80 100 120BR 7...

Page 136: ...130 Service Manual SM MDS_ ii MDS 150B MDS 150BR 7...

Page 137: ...Service Manual SM MDS_ ii 131 MDS 180B MDS 180BR 7...

Page 138: ...132 Service Manual SM MDS_ ii MDS 200 220 240B MDS 200 220 240BR 7...

Page 139: ...Service Manual SM MDS_ ii 133 MDS 260B 7...

Page 140: ...134 Service Manual SM MDS_ ii MDS 260BR 7...

Page 141: ...Service Manual SM MDS_ ii 135 MDS 280 300 320B 7...

Page 142: ...136 Service Manual SM MDS_ ii MDS 280 300 320BR 7...

Page 143: ...Service Manual SM MDS_ ii 137 5MDS 50 60 70B 5MDS 50 60 70BR 7...

Page 144: ...138 Service Manual SM MDS_ ii 5MDS 80 100 120B 5MDS 80 100 120BR 7...

Page 145: ...Service Manual SM MDS_ ii 139 5MDS 140 160 180B 5MDS 140 160 180BR 7...

Page 146: ...140 Service Manual SM MDS_ ii 5MDS 200 220 240B 5MDS 200 220 240BR 7...

Page 147: ...Service Manual SM MDS_ ii 141 5MDS 260 280 300B 7...

Page 148: ...142 Service Manual SM MDS_ ii 5MDS 260 280 300BR 7...

Page 149: ...Service Manual SM MDS_ ii 143 5MDS 320 340 360B 7...

Page 150: ...144 Service Manual SM MDS_ ii 5MDS 320 340 360BR 7...

Page 151: ...Service Manual SM MDS_ ii 145 5MDS 380 400 420B 7...

Page 152: ...146 Service Manual SM MDS_ ii 5MDS 380 400 420BR 7...

Page 153: ...Service Manual SM MDS_ ii 147 5MDS 440 460 480 500B 7...

Page 154: ...148 Service Manual SM MDS_ ii 5MDS 440 460 480 500BR 7...

Page 155: ...Service Manual SM MDS_ ii 149 MDS 080 100 120BHC MDS 140BHC 7...

Page 156: ...150 Service Manual SM MDS_ ii MDS 160 180BHC MDS 200BHC 7...

Page 157: ...Service Manual SM MDS_ ii 151 MDS 220BHC 7...

Page 158: ...152 Service Manual SM MDS_ ii MDS 240BHC 7...

Page 159: ...Service Manual SM MDS_ ii 153 MDS 260BHC 7...

Page 160: ...154 Service Manual SM MDS_ ii MDS 280BHC 7...

Page 161: ...Kindly take note that indoor units produced from March 2012 onwards should comes with PCB version 2 7 Kindly refer to the table below which indicates the starting batch number of indoor unit producti...

Page 162: ...3 Take note that the indoor unit will always be in standby condition there s power supply to the indoor PCB 4 When the key card is inserted the unit will not turn on directly unless Auto Restart has...

Page 163: ...s and the unit will not start This device is located in the control box of the outdoor unit The following table shows the LED indicator light for phase protector under normal and fault conditions Desc...

Page 164: ...158 Service Manual SM MDS_ ii 7...

Page 165: ......

Page 166: ...an ISO certified facility This document contains the most current product information as of this printing For the most up to date product information please go to www mcquayup com www mcquayup com 20...

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