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MDS commissioning manual

1. Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EM Indoor Unit EXV STEP Opening S C EXV4 High Pressure Pressure bar Low Pressure Discharge TH1 S C Inlet TH9 Busan S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor Unit Coil Mid Tm Coil Out To User Manual UM OG MO MS 74 gt 6 lt e Model MDS Ambient Temp Quantity Indoor Quantity In Operation Unit Condition Piping Branch Pipe i _ Total Piping Length Refrigerant Volume Outdoor Total Current Unit EXV Indoor Unit Opening S C EXV4 Pare Ven High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Unit Coil Mid Tm Coil Out To Model MDS B BR Ambient Indoor DB Quantity In Operation Condition a E 4 _ Voda sss oss 035 oss oss oss 035 oss vas oos 085 055 C f C Main Pipe Piping Branch Pipe Total Piping Length Unit ee Opening S C p 104 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Indoor PC Unit Suction TH12 Compressor Bottom Coil In Ti Unit Coil Mid Tm Coil Out To User Manual UM 08 M01 MS 75 Ambi
2. i y 17345 6 ure THES oja fa a From Figure 2 Item 15 the letter X indicate which indoor has communication problem Example 1 Situation Indoor number 1 is having communication error Observation The LED display will show CO 0 representing Indoor number 1 Example 2 Situation Indoor number 8 is having communication error Observation The LED display will show C7 7 representing Indoor number 8 Please take note that for MDS A series the maximum connectable indoors is only 16 units MDS Outdoor B Series Error Code The error code is shown on the outdoor PCB There is four 7 segment LED on the top right corner of the PCB Four 7 Segment LED Figure 3 MDS Outdoor B Series PCB User Manual UM 08 M01 MS 48 1 Figure 4 MDS Outdoor B Series Character Reference Table 00 indoor unit Communication failure 2 47 02 47 indoor unit Communication failure 49 ER49 FixicompressorOveroad 50 ER50 Fix2compressorOverload 51 5 Fix3compressorOverload 52 ERS2 Dischargepressureistoohigh 53 ERS3 Sucionpressureistoolow 54 ER54 Outdoor units IC Error 0 Figure 5 MDS Outdoor B Series Error Code ITEM CODE DESCRIPTION EC62 Refrigerant released Slaver outdoor unit Communication failure F East TH1 temperature sensor failure ER65 2 temperature sensor failure
3. Refrigerant Volume D rk r s Outdoor 15 0 S Volts a Indoor Unit 450 450 450 Low Pressure Discharge TH1 Suction TH12 Compressor Bottom Temp Coil In Ti Indoor Unit Coil Mid Tm Coil Out To User Manual UM 08 M01 MS 6 N Item Condition Outdoor Unit EXV Opening Pressure Temp Condition Outdoor Unit EXV Opening Pressure Indoor Unit Indoor Branch Pipe Total Piping Refrigerant Volume Total Current Volts S 18 076 5 20 5 7 5 18 0 6 5 220 380 220 380 220 380 Indoor Unit 400 400 400 400 400 400 EXV 1 150 High Pressure 2 2 Low E Indoor Unit Ambient Temp Indoor Unit Refrigerant Volume Total Current Volts Indoor Unit STEP EXV 1 80 0 85 0 Compressor Bottom Coil Mid Tm Coil Out To Indoor DB Outdoor pe nz kg EE L 9 Im o lo N IN o o X O oO CO EN High Pressure Low Pressure Indoor Unit Suction TH12 Compressor Bottom Coil Mid Tm User Manual UM 08 M01 MS 63 Item Ambient Indoor Temp Outdoor Indoor Unit Condition Piping Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening EXV 1 Pressure Low E Compressor Bottom Temp Coil In Ti Coil Mid Tm Coil Out To User Manual UM 08 M01 MS DB STEP x LA gt u 020
4. 7 Thickness At least 10 m preservation SS Figure 5 Insulation Recommendation bracket Arc washer Figure 4 MDS Piping User Manual UM 08 M01 MS Pipe specifications Diameter 6 25 to 25 4mm Diameter 28 58 to 41 3 mm At least 15mm Heat insulation At least 100 C For hot and wet environment it is recommended to increase the insulation thickness If there is special request due to customer requirement or country regulation please follow the specification stated The next item that needs to take note will be the installation of the EXV box Please ensure that the orientation of the EXV box is in vertical condition as shown in Figure 6 eg Figure 6 EXV Orientation For EXV box selection it depends on the type of indoor model Figure 7 shows the EXV against indoor model moomo Em w 4 1 4 MEX 18 2SAP D MEX 18 3SAP D MEX 22 2SAP D MCKD 010C 1 4 1 4 MEX 15 2SAP C MCKD 015C 1 4 1 4 MEX 15 2SAP C MCKD 020C 1 4 1 4 MEX 18 2SAP C MCKD 020A 1 4 1 4 MEX 18 2SAP C MCKD 025A 3 8 1 4 MEX 18 3SAP C MCKD 030A 3 8 3 8 MEX 24 3SAP C MCKD 040A 3 8 3 8 MEX 24 3SAP C MCKD 050A 3 8 3 8 MEX 24 3SAP C MEX 22 2SAP C MEX 22 3SAP C MEX 22 3SAP C MEX 22 3SAP C MCCD 010C 1 4 1 4 MEX 15 2SAP C MCCD 015C 1 4 1 4 MEX 15 2SAP C MCCD 020C 1 4 1 4 MEX 18 2SAP C MCCD 025C 3 8 1 4 MEX 18
5. Total Piping Outdoor Total Current nn Unt Volts 380 Exv IndoorUmit SEH Opening Soo 4239 133 High Pressure Presse bar peu Ei x 4 o 5 1012 u Outdoor ST Ouflet TH10 Unt SC Bypass Ouer Suction TH12 c Compressor Bottom Coil incr Indoor Coil Mia Tm Coil Out To User Manual UM 08 M01 MS 58 Model MDS Ambient E Outdoor Quantity Indoor Quantity In Operation Unit Condition Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXVA High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Ouder S C Outlet TH10 Unit S C Bypass Outlet TH11 Suction TH12 Compressor Bottom Coil In Ti Indoor Coil Mid Tm Coil Out To E 3 C Ambient Temp Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor Coil Mid Tm Unit Coil Out To User Manual UM 08 M01 MS 59 Model e B BR 180 MM EET aaa DB 21 15 27 19 29 19 Pl 2 3 jJ 4 Quanti EE Cond
6. Compressor Bottom Coil In Ti Coil Mid Tm Indoor Unit O Model 070 Item Ambient Indoor 21 15 27 19 32 23 Temp Outdoor 18 4 PC Indoor Unit 4 Condition 015 015 020 020 015 015 020 020 015 015 020 02 5 Piping Branch Pipe 5 N N N N Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit STEP Opening S C EXV4 High Pressure Pressure Bar Low Pressure Discharge TH1 Suction TH12 Compressor Bottom Coil In Ti 11 5 380 250 250 250 250 14 0 380 400 400 350 35 Wu 18 5 N Wu 98 0 16 0 65 0 15 5 16 0 17 5 Outdoor 16 0 55 0 10 0 10 0 10 5 Indoor Unit Coil Mid Tm Coil Out To User Manual UM 08 M01 MS 5 Appendix Il R22 MDS B Series Cooling Cycle Reference Model MDS B BR Indoor DB 21 15 27 19 08 j 3 Pressure Outdoor Unit Condition Compressor Bottom I 46 2 Coil In Ti Indoor Unit Coil Coil Mid Tm Coil Coil Out To Model MDS B BR Ambient Indoor DB 21 15 27 19 29 19 Temp Outdoor 21 1 3 1 49 4 Indoor PC Indoor Quantity In Operation EE 04 Condition Mods 025 030 25 030 025 25 025 008 5 Piping Branch Pipe m 8 fs Jj 5
7. ER66 TH3 temperature sensor failure ERGS_ 65 R67 ER68 ER69 TH6temperaturesensorfalure ER78 All indoor units Communication failure 63 64 67 70 71 72 73 74 75 76 L 78 From Figure 5 Item 0 47 the last two characters indicate which indoor has communication problem Example 1 Situation Indoor number 1 is having communication error Observation The LED display will show 00 representing Indoor number 1 Example 2 Situation Indoor number 21 is having communication error Observation The LED display will show 20 20 representing Indoor number 21 Please take note that for MDS B series the maximum connectable indoors is only 48 units User Manual UM 08 M01 MS 49 Indoor Error Code For indoor error code it will depend on type of indoor used For decorative type indoor like wall mounted ceiling cassette and ceiling convertible the error code will be display via the blinking of the LED For concealed type model the unit will be using wired controller MC301 For this controller it will display the indoor error code as well as the outdoor error code pe Sleep Fan D _1 Indorsesrerr 2 indoorpumpero 3 Communicationeror LS e 4 Outdoorsensorerror Compressor overload _Pressureswitchtrip LS Presuesesrerr O System failure
8. Model MDS B BR Indoor Temp Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor Coil Mid Tm Coil Out To C gt z 3 ES HEN Ambient Indoor Temp Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor il Mi Uni Coil Mid Tm Coil Out To User Manual UM OG MO MS 66 See Ambient EE Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Outdoor Unit Indoor du HI 7 D Q Discharge TH1 S C Inlet TH9 S C Outlet TH10 S C Bypass Outlet TH11 Suction TH12 Compressor Bottom Coil In Ti Coil Mid T
9. Wired controller 1 Overflow switch broken storage broken 2 Pump broken Change wired controller Pump malfunction 1 Data read faultily at the very beginning when power Change overflow switch indoor drain pump 2 Chip broken hange pump F8 A Press the reset button on the wired controller 1 Indoor and outdoor Communication wire broken 2 Indoor and outdoor Communication wire loose OR Check communication wire and solve it 3 Indoor and outdoor Communication wire A B reversed Indoor and 4 Communication wire too long should less than 1000 m Communication 5 Outdoor PCB not power on p pply malfunction 6 Indoor and outdoor jump wire not correct still on update status 7 last indoor unit terminal resistance of communication wire not short circuit 8 Indoor and outdoor PCB program not compatible 9 Indoor and outdoor PCB abnormal 1 master unit and slave unit Communication wire reversed d Check Master unit Check communication wire and solve it Check communication wire and solve it and slave unit communication malfunction 2 master unit and slave unit Communication wire broken or loose 3 Slave unit toggle switch set wrongly Check the toggle switch setting All toggle switches should be the same except the master unit SW2 1 set to ON Digital HO compressor overloaded Fixed 1 compressor 1 overloaded 2 Fixed Fixe
10. 55 p 400 150 015 450 070 E 05 2 0 02 400 40 ss 85 0 40 0 39 0 42 0 70 0 0 0 0 4 15 50 0 1 27 19 E 9 ts N N 12 5 CA Co e Wu 2 0 e N O 450 400 400 N Wu Co 19 7 95 0 13 0 53 0 40 0 50 0 85 0 D E Appendix IV R22 MDS B Series Heating Cycle Reference Model MDS B BR Ambient Indoor Temp Outdoor Quantity Quantity In Operation 4 4 4 5 5 Piping Branch Pipe Total Current Volts Indoor Unit S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdeer S C Outlet TH10 Unit S C Bypass Outlet TH11 Suction TH12 Compressor Bottom Coil In Ti Indoor Coil Mid Tm Coil Out To o 3 k Model MDS B BR Ambient Indoor Temp Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor il Mi Uni Coil Mid Tm Coil Out To LI UJ 1 EN EEN ESL NI N N O N Wu e N Wu CA e e CA e GE d A m lt 265 3 U User Manual UM 08 M01 MS 65
11. 9 f there is only 4 indoors in the system please select 4 Figure 21 Location of K1 and K2 by pressing K1 until the LED show 4 Then press 2 to confirm 10 Leave it for 5 seconds and the system will come out from the setting mode automatically Please read first before you try on the PCB If K1 or K2 is not press after 5 seconds it will exit from the setting mode automatically User Manual UM 08 M01 MS 25 MDS B Series For MDS B series there are total 3 set of dipswitches These dipswitches are located on the upper layer of the PCB same level with the 7 segment LED display Figure 22 MDS B Series Outdoor PCB Dipswitch S1 ON 1 RRERERERC 1 2 34 5 6 7 8 of indoor units MDS A B Cooling only Heatpump Figure 23 Dipswitch 1 For dipswitch 1 there are 3 functions S1 1 is to determine whether the PCB is use in the MDS A series or a MDS B series S1 2 is to determine whether the model is a cooling only model or heatpump model Dipswitch S1 3 S1 8 are use to determine the quantity of indoors connected to the outdoor MODEL MDS B Series MDS A Series Heatpump Cooling only Figure 24 Dipswitch S1 1 amp S1 2 User Manual UM 08 M01 MS 26 Indoor Quantity o 1 D D Gg ua 1 WE D CUE D 0 SEN EN 1 Figure 25 Dipswitch 51 3 to 51 8 D zb X X E N NINININI
12. o 1 1 0 MWMOUT Ek WMD15G 0 0 1 0 0 WMD20G 0 1 0 o 0 WMD25G 0 1 o 1 0 po pi CKD10C 1 o 1 1 0 MCKOUT CKD15C 0 0 1 0 MCKOBT CKD20C 20A 1 o o o CKD25A 0 o 1 0 25 O CKD30A 1 1 1 0o 0 CKD40A 1 1 1 1 0 CKD50A 1 o 0 1 0 CO F y NEN ESSERI CED15E 0 0 1 0 0 15 _ _ _ CED20E 0 1 0 o 0 CED25E 0 1 o 1 0 CED28E x 1 1 0 1 0 CED40D 1 1 1 0 MCMMPT CED50D 1 o o 1 0 AX CED62C 0 1 o 1 1 xC MDBD080 0 0 o o 1 MDBD100 o o J 1 1 1 Figure 26 Indoor Name Reference 40 Outdoor Unit Parameter Modification For the outdoor Unit Parameter Modification option it is advisable not to change any data unless under the instruction from the factory side The default value set had been decided after numerous testing conducted by R amp D and should be suitable for most condition Modify Outdoor Unit Parameter Figure 27 Button to access the Outdoor Unit Parameter Modification Window In order to change any outdoor
13. 20 BN D frost Area nn Ambient 30 20 10 0 10 20 Figure 29 Defrost Area Definition User Manual UM 08 M01 MS 41 Defrost Finish Temperature The defrost cycle will stop once TH9 exceed this set point The lower the temperature the faster the defrost cycle will end The allowable range is from 10 deg C to 50 deg C Default value for MDS80 240 is 15 deg Default value for MDS260 500 is 18 deg C Defrost Interval Time The interval time between defrost cycle The smaller the value the shorter time between the defrost cycle The allowable range is from 25 minutes to 90 minutes Default value is 45 minutes Defrost Operation Time The duration of the defrost cycle The smaller the value the short the defrost duration The allowable range is from 5 minutes to 15 minutes Default value is 10 minutes Defrost Delay Time This option is for future provision Currently is not available Sub Cool Circuit Parameter The next parameter is TscA1 TscA2 TscT1 TscT2 TscT3 which located inside a same box These 5 setting is use to change the sub cool circuit which is only available in the MDS B series outdoor Figure 31 Sub Cool Circuit Parameter The main mechanism controlling the sub cool circuit is the EXV 4 TscA1 amp TscA2 is the reference temperature for TH9 which is the refrigerant temperature before sub cool circuit TscT1 IscT2 amp TscT3 is the target Sub cool target temperature the system needs to
14. D d Modify Outdoor Unit Parameter Special order Next Page Figure 18 Smart Commander Connected to MDS System Smart Commander User Manual Smart Commander Service version had two different windows The first window is named Circuit Monitor User is allows to control and monitor the indoor and outdoor parameter under this windows The Server Monitor window allows user to plot graph using the data already obtain when the Smart Commander is connected to the MDS system Circuit Monitor Circuit monitor interface is used to monitor all parameter of indoor and outdoor which connected to monitor software imi McQuay Smart Commander File F Function E Help H UE Identity Single Mode Cooling Edition 0 1 No 0 MDSO80B410 Cont 10 0 out 0 0 Ts 20 0 NCCODET Compl DIG 0 _ Ti 0 0 T mm 0 Comp2 FIX OFF Ts 20 0 MCCOLOT Comp3 FIX 7 Ti 0 0 pens 0 Comp4 FIX mm oe aoit Mm Tn 0 0 Ts 20 0 1 0 Ti 0 0 0 BEE TH4 THS THB Me TH 00 TH 00 TH10 0 0 0 0 Ts 20 0 MCC025T WS E 7 Y D Ts 20 015 MCCOPOT Ti 0 0 C 0 dba TH oot TH12 0 0 dd 1 0 Ts 20 0 C NCCD30T 0 o Tio C EXV D Ts 200 NCCD40T nu mo 59 F J Modify Outdoor Unit Parameter Special order Figure 19 Circuit Monitor Window Smart Commander User Manual UM 08 M01 M
15. then only the value YYYY Outdoor Information Reading NNT 2 Compressor Suction Temp Compressor Bottom Temp o 4 Condensing Coll inlet Temp 5 Condensing Coll Medium Temp 6 Condensing Coll Outlet Temp 8 Modulation Percentage Figure 20 MDS A Series Data Besides the dipswitches setting mention there is also a field setting mode It is important to know this field setting mode because the quantity of indoors of the MDS A series system needs to be set here To enter into field setting mode kindly follow the steps listed below Power up the outdoor Press K2 for 5 second to enter parameter setting mode The 7 segments LED display will show 3 You need to key in the password before you can make any changes The password is 0755 4 Press K1 to select Press K2 to confirm 5 After it show press K1 It will show 0 Press K2 it will show O 6 After that press K1 to select 7 and K2 to confirm 7 Once you successfully select 0755 and press K2 the PCB will enter setting mode 8 The available setting to adjust are as follow Indoor Quantity Temperature to initiate defrost checking Temperature to initiate defrost cycle Temperature to stop defrost cycle Interval of defrost cycle Duration of defrost cycle N ooocm Most of the time the only setting that need to do is the indoor quantity Other data remain as factory default value
16. 52 6 Address 3 1 ON p 52 1 52 6 2 Indoor 4 Figure 7 MDS Indoor Address Example User Manual UM 08 M01 MS 19 Dipswitch 3 SW3 ss MEEBEBEEER C RR E ee Dipswitch 3 SW3 is used for model and capacity setting Usually when the unit is shipped out from factory the setting is already done However it is advisable that the commissioner to check all indoors during every commissioning Figure 9 and Figure 10 shows the respective setting for indoor type and indoor capacity The indoor capacity and model capacity setting shown in Figure 9 amp 10 is applicable for R22 and R410A model DIP SWITCH S3 S1 S5 3 1 53 2 3 3 3 4 53 5 CAPACITY KW MODEL NAME Figure 8 Dipswitch 3 SW3 _0 0 1 Eg 0 1 0 0 0 REC NNI EO SEE EC MODEL Applicable for Wall Mounted Ceiling Concealed Ceiling Cassette and Ceiling Convertible Figure 9 Capacity Setting for MDS Indoor from Malaysia DIP SWITCH S3 S6 S8 S3 6 S3 7 S3 8 INDOOR TYPE 0 0 Ceiling Concealed 0 O 1 Geng Cassette 1 0 Ceiling Convertible 0 1 0 Ducted Bouwe Figure 10 Model Setting for MDS Indoor from Malaysia UP QUU cow BUR 53 1 53 8 53 1 53 8 Figure 11 Indoor Model and Capacity Setting Example User Manual UM 08 M01 MS 20 Auto Random Restart The standard indoor come with auto random restart disable
17. DIA 9 52 19 05 10 0m Y DIA 9 52 15 88 Om 02 MWMD025G PIPE DIA 9 52 19 05 PIPE DIA 6 35 15 88 Figure 2 MDS System Layout Once all this is completed user will be able to generate the report Besides that the user can also generate the equipment layout into a picture file See Figure 3 Indoor Model Outdoor Model Actual capacity ratio 101 3 Charge refrigerant 3820 g door coo condition Uv GCopperPipe 28 6mmxt1 2 100 Bi75mmxti4 34 9mmxt1 4 sew Ls LI T o E wee so se Rem 3 m pe wwe 5 x nm ss o wm CopperPipe 15 86mmati2 260 hoosmmarz 70 so a mA Ma im ir Additional Refrigerant Charge Figure 3 MDS Selection Report Check piping routing wiring routing amp connection ve sommes oo door heat condition DB20 0 WB15 CopperPipe 38 1mmxt1 6 0 0 41 3mmxt1 6 22 2mmxt1 2 mme 3 moss o o o wosc2 o III _ There are few things to check All this should be done during installation However it is better to check all items again before commissioning Piping Routing Ensure both liquid and gas pipe are insulated Both air pipe and liquid pipe Insulation apparatus need to be insulated Heat preservation preservation Copper pipe 2 2
18. EACE EEE E Ne LEDON LED OFF LED BLINK Figure 7 MDS Indoor Error Code Error Code Figure 6 MDS Indoor Error Code LED Blinking Location on Wired Controller MC301 1 EO System malfunction 2 E1 Sensor broken TH1 discharge temp 3 E2 Sensor broken TH2 inlet coil 1 _4 Sensor broken TH3 mid coil 1 5 E4 Sensor broken inlet coil 20 FC 6 ES Sensor broken TH5 mid coil 2 7 Sensor broken TH6 inlet coil 3 8 E7 Sensor broken TH7 mid coil 3 9 Sensor broken TH8 ambienttemp 10 E9 Sensor broken TH9 outlet 12 Sensor broken TH11subcool suction 14 EF Emergeneyrn 15 FO Outdoor storage malfunction 16 F1 Sensorbroken indoorinletcoi 17 F2 Sensorbroken indoormidcoil 18 Sensor broken indooroutletcoil 19 F4 Sensor broken indoor return air 20 F5 Sensor broken indoor supply air 21 F6 Indoor and controller communication malfunction Sensor broken slaveTH4 inlet coil 2 Ambient temp exceed the limit Sensor broken slave TH5 mid coil 2 45 16 Sensor broken slaveTH6 inlet coil 34 47 18 Sensor broken slaveTH8 ambient temp 48 19 Sensor broken slaveTH9 outlet coil 50 1B Sensor broken slave TH11 subcool suction 52 Emergency run slave 53 20 Outdoor storage mal
19. EXV4 High Pressure Pressure Low Pressure SE lw Temp Unit Bypass Outlet S C Bypass Outlet TH11 Suction TH12 pu Bottom MEM Indoor Unit Coil ER Ambient ndoor DB 21 15 27 19 29 19 Temp Outdoor B 21 J 3 0 4 Quantity _ 4 j Indoor Unit Condition 4 4 pa j 58 ss us ses 5 68 bo ES E Piping Total Total Piping Length Length geer WE Unit vois Lv 3 38 indoor Unit m Opening Se E Pressure High Pressure Pressure Low Pressure Discharge TH1 S C S C Inlet TH9 Outdoor S C Outlet TH10 Unit ET C Bypass Outlet S C Bypass Outlet TH11 Temp NICO ee Bottom Coil e Soren Indoor Unit De Coil Mid Tm Coil Out Gran User Manual UM 08 M01 MS 71 Model MDS B BR Ambient Indoor Temp Outdoor Quantity Indoor Opening S C EXV4 High Pressure V EXV Indoor Unit 29 IL ZIL bar Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Suction TH12 Coil In Ti deg Mid Tm Coil Out Toi Model MDS B BR Ambient Indoor D I Outdoor WB Quantit 4 Quantity In Operation Condition Model 060 050 060 050 050 060 Main Pipe Branch Pipe Total Piping Length Refrig
20. Error Code The MDS system is equipment with a list of error code to help user to trouble shoot if any system error occurs The error code can be separated into indoor error code and outdoor error code Outdoor Error Code Similarly the error code for outdoor is differential by version of the MDS outdoor MDS outdoor A series has a list of error code and MDS outdoor B had another list of list of error code MDS Outdoor A Series Error Code The error code is shown on the outdoor PCB There is four 7 segment LED on the top right corner of the PCB ITEM CODE DESCRIPTION E0 Discharge temperature sensor mutfunction Ei Outdoor ambient temperature sensor mulfunction E2 Suction temperature sensor mulfunction Compressor base temperature sensor mulfunction E4 Coilinlettemperaturesensormulfuncion 5 Coil middle temperature sensor mulfunction E6 Coil inlet temperature sensor mulfunction E7 Compressor discharge temperature too high gt 130 deg C General System failure Hi Hghpessretip H2 Digital scroll compressor overload H3 Fixed scrol compressor overload D Low pressure trip C Communication failure between outdoor and all indoors 15 CH X indoor no Particular indoor no communication Figure 1 MDS Outdoor A Series PCB Figure 2 MDS Outdoor A Series Error Code 1 TER dai N lin WP e LI H 1 ON t
21. Model 040 Ambient Indoor 21 15 27 19 32 23 Temp Outdoor WB 18 _ ne Indoor Unit Quantity in Operation re EH 010 010 010 040 010 010 010 010 010 010 010 010 5 Piping Branch Pipe m 5 Total Piping Length 22 Refrigerant Volume LA Total Current 12 5 Volts EBENEN NENNEN NENNEN NEN 150 S C EXV4 060 11 0 Low Pressure Compressor Bottom eo Indoor Unit Mid Tm Coil Out To 55 Item Condition Outdoor Unit EXV Opening Pressure Temp Item Condition Outdoor Unit EXV Opening Pressure Temp User Manual UM 08 M01 MS 5 Model 050 Ambient Indoor DB 21 15 27 19 32 23 Temp Outdoor WB 18 35 Indoor Unit Main Pipe Piping Branch Pipe Total Piping Refrigerant Volume kg 225 47149 T5 aeu EE 260195 Volts 220380 EC Indoor Unit EE Low Pressure _ 46 65 900 41000 Compressor Bottom Coil In Ti 90 460 J Indoor Unit Coil Mid Tm Coil Out To Model 060 Ambient Indoor DB 21 15 27 19 32 23 Temp Outdoor WB Indoor Unit O w 040 020 040 Piping Branch Pipe Total Piping Length _ 2 E Refrigerant Volume Ht Curent Volts NEM NNNM 380 Indoor Unit E E E S C EXVA M 10 5 Low Pressure Discharge TH1 980 O 90 16 0
22. There are two type of setting to activate the auto random restart function For ceiling concealed model which is using the wired controller MC301 the setting is done on the handset PCB itself For wireless handset model wall mounted ceiling cassette and ceiling convertible the setting can be done using the wireless handset Wired Controller MC301 For wired handset MC301 there are 4 dipswitches on the back of the PCB Please refer to Figure 12 Once the auto random restart is set the LCD of the wired controller will have an indication See Figure 13 While changing the setting on the PCB please make sure the power supply of the indoor is switch off Not applicable Reserved for future ON Wired handset with real time clock come as standard OFF Wired handset without real time clock ON Auto restart OFF Auto restart OFF Figure 12 Dipswitch Location and Respective Function Figure 13 Auto Random Restart Indication Wireless Handset To enable auto random restart function on indoor unit using wireless handset the process will be slightly complicated The indoor power supply must be available Handset G7 G11 or G17 all can be use to do the setting To enable Auto Random Restart the steps 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 handset
23. and for heat pump model set it to OFF position 1 0 Heatpump Cooling only Figure 18 MDS A Series Mode Selections User Manual UM 08 M01 MS 23 If the outdoor is not connected to the central control monitoring software Smart Commander or the Central Wired Controller MC303 there is no need to set the address If the outdoor is connected with these accessories then the same rules on the indoor setting is applied here also The rules are as follow e Each outdoor number must be unique The outdoor address cannot duplicate f The first outdoor address must be 0 Do not start the first outdoor with address 1 g While setting the outdoor address the outdoor address number cannot skip For example if there are only 4 outdoors in a system the outdoor address needs to be 0 1 2 and 3 h It is advisable that the outdoor address follow the sequence of the communication wiring For example for a 4 outdoors in the system the first outdoor after the gateway should have address 0 the next outdoor address should be 1 and the last outdoor of the communication wiring should be 3 lt D D _0_ _0_ _0_ _0_ D D _0_ _0_ _0_ _0_ s _0_ EN Figure 19 MDS A Series Outdoor Addresses User Manual UM 08 M01 MS 24 After the MDS A Series is powered up the 7 segment display will show list of reading The shown data are stated in Figure 20 It will show the reference X first
24. indoor and outdoor setting are preset and tested before they are shipped out from the factory However it is advisable to reconfirm the setting on the setting before any commissioning Before one can start checking on the PCB setting it is important to know the location of the dip switch and every dipswitch function MDS Indoor PCB Setting For MDS indoor there all 4 type of setting need to be determined They are a Indoor Type b Indoor Capacity c Indoor Address d Indoor Function There are two type of indoor PCB However the dipswitch location and function is the same C0706 202N4AC C 12V DC N en 250V TAS n maren 12VeDC 250V T85 0 60 pe www d d d d ET Ay EI a M D O2N4AC C 12V 5 Z 277VAC imt Si ms A27TVAC uu Dipswitch 1 SW1 Dipswitch 2 SW2 CR Dipswitch 2 SW2 Dipswitch SW3 Figure 1 Dipswitch Location for MDS Wall Mounted Size 20 amp 25 User Manual UM 08 M01 MS 17 Dipswitch 1 SW1 SEREEN 1 2 3 4 5 6 Auxiliary Heater Reserved 1 amp 2 Water Pump Dipswitch 1 SW1 is used to determine the special function of the indoor unit There are 2 main special functions that can be specified in MDS indoor unit The first function is the heater function This heater option is only applicable for d
25. parameter the user need click on the Modify Outdoor Unit Parameter button a new window will prompt out 2 X n Connection OP aram Modify OutParam Defrot curve A point 5 m 1 E c Defrot curve B point 24 TscA2 40 Defrot finish temperature 15 Defrot interval time 45 TscT2 Defrot Operation Time 10 TscT3 12 1 0 EU x Operation object Master unit Slave unit Defrot delay time superheat degree Action 1 Action 1 Manual control valve open degree EXVI 0 EXV2 lo EXv4 0 Figure 28 Outdoor Unit Parameter Modification Window Default setting f Defrost curve A B point is used to define defrost area For the defrost curve A point the outdoor ambient is set at 6 C User is only allow to change the suction temperature The allowable range is from 2 C to 15 C Default value is 6 C For the defrost curve B point the outdoor ambient is set at 15 C User is only allow to change the suction temperature The allowable range is from 30 C to 15 C Default value is 24 C If the value is smaller the defrost area shared green will become smaller This means that is harder for the system to enter the defrost cycle After the system had enter the defrost cycle the system will come out faster from the defrost cycle TH12 Suction 5 A 6 6 10 15
26. x 105 LI 15 Total Piping Length Refrigerant Volume kg Outdoor Total Current KS Unit Volts K EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor 9 Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Piping gt lt o j T U Compressor Bottom Coil In Ti Unit Coil Mid Tm Coil Out To For Master amp Slave Combination MDS260 320B BR please refer to the base model for reference Example MDS260B BR please refer to MDS120B BR Master and MDS150B BR Slave as reference User Manual UM 08 M01 MS 61 Appendix Ill R22 MDS A Series Heating Cycle Reference Model Item 5 Ambient Indoor DB 20 15 20 19 27 19 Temp Outdoor WB E Indoor Unit Quantity in Operation oo Condition 6 5 EE E E Piping Pipe m 5 Kl Total Piping Length 22 Refrigerant Volume Pkg 26 26 26 Outdoor Total Current Unit SE EXV 450 450 400 450 400 Opening EXV 1 150 o Low Pressure Discharge TH1 Suction TH12 Temp Compressor Bottom Coil In Ti Indoor Unit Coil Mid Tm Coil Out To Model 040 Item Ambient Indoor 20 15 20 16 27 19 Temp Outdoor WB 7 6 4 44 Indoor Unit Quantity in Operation s Condition Temsi EE REN RR RN Piping Branch Pipe M Total Piping Length
27. 0 120 140 160 180 260 280 300 320 340 360B BR SMDS200 220 240 380 400 420 440 460 480 500B BR 47 48 gt Terminal 32 Terminal 33 Figure 16 MDS 080 100 120 150B BR Communication Terminals User Manual UM 08 M01 MS 14 Outdoor 1 Outdoor 2 Outdoor lt e Lr gg e uem T L Z9 ED em e 2 em e ct 2 M Du 57 M A 8 7 lt lt 30 31 32 35 k lt WW Figure 17 MDS B Series Outdoor to Outdoor Connection For master and slave model the connection between master and slave is already done during master salve outdoor to the indoors For the last MDS B series outdoor the jumper JP6 needs to be jumped This is to indicate to the software that this is the last outdoor unit The connection is shown in Figure 18 Short jumper JP6 Figure 18 Location of Jumper JP6 in Outdoor MDS B Series PCB User Manual UM 08 M01 MS 15 Similar while using the smart commander Central Control 8 Monitoring Software the commissioning software the outdoor need to be connected to the gateway before then only connect to the computer either a desktop or a laptop See Figure 19 Outdoor PCB 1 MDS B S N SRK oe LOS Figure 19 MDS B Series Outdoor Connections to Gateway User Manual UM 08 M01 MS 16 MDS PCB For MDS system the units both
28. 3SAP C MCCD 028C 3 8 MCCD 030C 3 8 3 8 MEX 24 3SAP C MCCD 038C 3 8 MCCD 040C 3 8 MEX 24 3SAP C MCCD 050C 3 8 MEX 24 3SAP C MCCD 060C 3 8 MEX 24 4SAP C MCMD 025E 1 4 MEX 22 2SAP C MCMD 028E 3 8 MEX 22 3SAP C MEX 22 2SAP C MEX 22 3SAP C MEX 22 3SAP C MEX 22 3SAP C MEX 22 3SAP C MEX 22 3SAP C MEX 24 3SAP C MCMD 040D MCMD 050D MCMD 062C 3 8 3 8 3 8 MEX 24 3SAP C MEX 22 3SAP C MEX 24 3SAP C MEX 22 3SAP C MEX 24 4SAP C MEX 24 3SAP C Figure 7 EXV Box for MDS Indoor from Malaysia User Manual UM 08 M01 MS 7 MDS System Wiring As MDS is a system by itself The wiring for the system is very critical Generally the wiring part can be divided into MDS Outdoor to MDS Indoor wiring and MDS Outdoor to Gateway wiring The wiring use for both categories will be the same Wire Structure A conducing wiring copper intersection surface is more than 0 5mm2 or 20AWG B Insulation meterial C Screen layer efficiency shall be higher than 95 D Outside layer protector PVC Note For wiring cable refer to UL 2547 and UL2791 standard Figure 1 Recommended wiring For the MDS system the communication protocol is using RS485 There are some limitations on the wiring e PC to Gateway 2m RS232 Wiring provided by factory Gateway to Last Outdoor lt 1000m RS485 Outdoor to Last Indoor lt 1000m RS485 MDS Outdoor to Indoor Wiring As the MDS system is a single outdoor multiple indoors syste
29. 60 480 500B BR 4 48 The next connection will be from the gateway to the serial port of the laptop or personal computer PC There are two ways of connection depends on the hardware of the PC For PC with serial port available the connection will be as follow Serial Port YS sas to RS232 cable Provided fromthe factory Gateway Figure 10 Gateway to Serial Port Connection However in the event of the PC does not have serial port a RS232 Serial Port to USB converter cable can be use The connection will be as follow RS485 to RS232 cable Provided from the factory RS232 to USB converter cable Self purchase Gateway Figure 11 Gateway to USB Port Connection User Manual UM 08 M01 MS 32 When user purchased the RS232 to USB converter from any IT hardware outlets it will come together with a CD which consist the driver Kindly install the drive accordingly The interface will be different base on the supplier hence this manual cannot give any guideline or any indication Once the driver is installed the user will need to change the setting on the smart commander software to perform the connection The steps will be quite complicated Hence kindly read through before try out on the PC Step 1 Go to Start and select Control Panel Figure 12 Start up Menu After click on the Control Panel a new window will prompt up The manual show a lot of setting that can be done the PC Plea
30. 7 MDS B Series Terminal Number References R22 Master amp Slave Combination User Manual UM 08 M01 MS 10 SMDS 2208 R S SMDS 2408 R S SMDS 25085 R 410A Model Master Unit Terminal Number for A Terminal Number for B 5 31 5MDS240 250BM BRM 4 46 R 410A Model Slave Unit Terminal Number for A Terminal Number for B 5MDS140 160 180BS BRS 5MD S200 220 240 250BS BRS 47 48 Figure 8 MDS B Series Terminal Number References R410 Master amp Slave Combination Le am GND 32 33 d lt CH 30 31 e S x WAT 32 33 KS Si mE PCB Indoor MDS120 150 160BR MDS130 150 160BR 5 Outdoor Figure 9 MDS B Series Outdoor to Indoor Connection Master 8 Slave Combination User Manual UM 08 M01 MS wm gw 1 pe 11 For the indoor PCB there are two Ain and Bin terminal One of the terminal is green colour and the other is orange colour For the outdoor to indoors communication wiring the wire need to be terminate on the green colour terminal The orange terminal is used for other purpose Note The orange colour terminal may or may not be available depending on the hardware version of the PCB For the last indoor unit the communication jumper needs to be shorted See Figure 10 This is to indicate to the outdoor unit that this is the last indoor unit If the jumper is not shorted the communicat
31. B Board MDS A Series For MDS A series outdoor there are 2 set of dipswitches Besides this there is also a setting mode to modify certain important parameters Ne Cag 1 1S Figure 14 MDS A Series Outdoor PCB User Manual UM 08 M01 MS 22 Dipswitch 1 ON 1 si MEMERMER o 1 2 3 4 5 6 7 EXV Initial Y mna MDS A Capacity Opening Reserved Figure 15 Dipswitch 1 For dipswitch 1 the main function is to determine the MDS A series outdoor capacity Dipswitch 51 1 and 51 2 EXV Initial Opening is only use by R amp D for testing purpose During site commissioning it is advisable not alter the setting unless advice from the factory side Dipswitch 51 3 is reserved for future used Dipswitch 51 4 to 51 7 is to determine the MDS A Series capacity See Figure 16 MDS A Capacity 7 Figure 16 Dipswitch 1 Dipswitch 2 na Reserved Model Outdoor address Figure 17 Dipswitch 2 For dipswitch 2 there are 2 main functions The first will be the type of model S2 6 and the second will be the outdoor address setting S2 1 to S2 5 The remaining dipswitches 52 7 and S2 8 are reserved for future provision For dipswitches 2 6 model selection it will determine whether the model is a cooling only model or a heatpump model This setting is important because the MDS A series PCB is common for both cooling only model and heatpump model To select a cooling only model set dipswitch S2 6 to ON position
32. Indoor Address Location Figure 24 Scroll to Specific Indoor Unit To change the setting on the indoor user will need click on the Ctrl button After the button is click a new window will prompt out 2 20 0 C Sei 0 0 Te 20 0 C To 0 0 C Figure 25 Indoor Unit Control Window The Indoor Unit Control Window can be divided into 2 main sections Top portion is the Information Portion display and divided with unit information and unit operating status The bottom portion of the screen is the Control Portion The top part of the Information Portion displays the information of the indoor tem Display Outdoor No The outdoor address this particular indoor is connected to If there is no outdoor address set the default value will be O The address set on the indoor This will be base on the PCB setting Name indoor model and capacity If the indoors use are from Malaysia factory the capacity will be different Please refer to Figure 26 Indoor Names Reference The Indoor program version The bottom portion of the Information Portion displays the current setting and operating mode of the indoor unit Item Display Operating model of the indoor unit Available mode Stop Cooling Heating Dry Fan Room Temp Indoor room temperature Unit C Set Temp Indoor set temperature Unit C Fan Speed The operating fan speed Available speed High Medium Low User Man
33. O MS 4 Commissioning Flow Chart In order to commissioning MDS there are some necessary steps to follow These steps help to streamline the possible problem that may occur during commissioning Figure 1 provides a general guide line for commissioning MDS system This is useful whether for first timer as reference or experience technicians engineers as check list Is all indoor No Models connected To the outdoor Yes Start all indoors one by one Set indoor Temperature according to design requirement Yes Is the report from Selection software Available No Calculate additional refrigerant base on piping Length and pipe diameter Add in additional refrigerant Monitor outdoor parameter Figure 1 Commissioning Flow Chart User Manual UM 08 M01 MS 5 Obtain design drawing and Report While designing the MDS system using the selection software the user will draw the equipment layout on the software workplace After completed the drawing the software will select the appropriate outdoor model base on the user requirement See Figure 2 Unit number OD 1 Indoor units supplied OYLM File F Unit U Drawing Tools Windows W Help H Sk z amp Unit number OD 1 Indoor units supplied OYLM New Project 01 MDS Unit OD 1 MDS180B 98 mam ct PIPE DIA 9 52 15 88 mm A Rooml CKD025A ue PIPE
34. P only Serial Port and USB port is available e Monitor screen size 15 inches or above Inside the commissioning kit from the factory it consist of a CD with the commissioning Software a dongle USB key a gateway with power connection and a cable connected from the gateway to serial port The Service Manual will have a more detail explanation on software function Ram E 71 SERVICE MANUAL Figure 1 Content inside the Commissioning Kit Set Up the Software To set up the software first is to install the driver for the USB dongle key Once the drive is completed install the Smart Commander Software In the CD come together with the smart commander kit there are 4 items Files Currently on the CD 5 730 Smart Commander Smart Commander Installation Guide Smart Commander Serial Number Figure 2 Content inside the CD To set up the USB dongle drive the user is required to initiate the setup file in the SPI730 folder Riles Currently on the CD Files Currently on the CD help SPI FRE C3 Intemet Installer E dul Smart Commander Ga Merge C3 Server 2 Smart Commander Installation Guide 2 566 ReadMe 130 Smart Commander Serial Number sDHK_sHG opp e Gi Sentinel Protection Installer 7 3 0 2 159 KB 3 707 KB Figure 3 Initiate the setup file User Manual UM 08 M01 MS 29 After initiated the setup just follow through the instruction on the prompt up scre
35. Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 long S C Outlet TH10 Unit S C Bypass Outlet TH11 Suction TH12 Compressor Bottom Coil In Ti Indoor Coil Mid Tm Coil Out To Ambient Indoor Temp Outdoor Quantity Indoor Quantity In Operation 4 Condition Moda 955 635 055 035 035 635 055 635 635 635 05 H 5 N 00 e Co e Co e CA Wu Co e N Co e CA e N 00 NO Co e N Co D 5 o 7 m D Di 3 CH C Mam Piping Branch Pipe 2 D m lt F G U 8 Total Piping Length Refrigerant Volume 3 580 3 Outdoor Total Current Unit Volts 8 EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure 325 325 363 363 379 379 379 88 3 88 Discharge TH mg 9 Outdoor i Unit S C OutletTHT0 S C Bypass Ouflet THTT Suction TH12 Compressor Bottom 3 Temp 4 Gaam indoor Coil Outo User Manual UM 08 M01 MS 70 Ambient gadi Temp Outdoor Quantity der Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C
36. S 36 If the MDSs are connected in a network User can observe parameter of outdoor unit through the outdoor set address in the PCB Once the outdoor is selected the relevant outdoor unit number will be highlighted with a darker colour Figure 20 Outdoor Selection There are four major parts in the Circuit Monitor window Outdoor Unit Monitoring Outdoor Refrigerant Diagram e Indoor Unit Control and Monitoring Outdoor Unit Parameter Modification Outdoor Unit Monitoring Item that can be monitor on an outdoor unit are as follow tem Mode Operating Mode Cooling Heating Defrost Outdoor unit superheat Unit C Comp1 DIG Digital compressor output percentage Unit Comp2 3 4 FIX FAN1 FAN2 HS LS High pressure and low pressure reading Unit Bar 1bar 0 1MPa 1bar 0 98kgf cm TH Temperature sensor reading Unit C TH1 Compressor discharge TH2 1st Coil inlet TH3 1st Coil middle TH4 2nd Coil inlet TH5 2nd Coil middle TH6 Entering water Applicable for water source Identity Single Made Cooling Edition 0 1 Cout Tsh eut 0 0 Compl TIG 0 Comp2 FIX Comp3 FIX Compa FIX FAN STOP Fade H5 0 0 bar s bar THB THB 0 0 TH10 0 0 TH12 0 0 5 model only Heaving water Applicable for water source model only TH8 Outdoor Ambient TH9 Refrigerant temperature before sub cool circuit TH10 Refrigerant temperature af
37. User Manual UM 08 M01 MS Multi Digital Scroll System MDS Commissioning Manual DIT TT PEEL f kaka So A pt ke As McQuav Air Conditioning Engineered for flexibility and performance The data and suggestions in this document are believed current and accurate at the time of publication but they are not a substitute for trained experienced and professional service Individual applications and site variations can significantly affect the results and effectiveness of any information the reader must 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 User Manual UM 08 M01 MS Table of Content EE 4 Commissioning FOW E 5 MDS System Wiring uuu uuu ua UT TIT 8 MDS SONG WEE 17 pen eg 29 EO CO 48 55 User Manual UM 08 M01 MS Introduction The MDS Commissioning Manual provides a guideline to service personnel to perform start up on the MDS system Besides providing the details on the system wiring method termination connection and PCB setting this manual also consists information and working instruction on the Smart Commander Service Version The complete list of error code is also provided in this manual with some possible root cause as guidance during troubleshooting User Manual UM OG M
38. achieve The actual sub cool temperature will be base on TH9 TH10 Example with default value 32 deg 40 deg C TH9 deg C TscA1 TscA2 TscT1 TscT2 TscT3 mv Target for Sub cool temp 3 deg C 8 deg C 12 deg C As the coil leaving temperature increase the system will increase the sub cool temperature for better performance and long piping application Figure 32 Sub Cool Circuit Control Chart Superheat degree is the parameter for controlling outdoor superheat EXV 1 This option is only applicable for heatpump model and EXV 1 is only used during heating cycle The EXV 1 will open to achieve the target set here Default value will be 5 deg c for R22 and 3 deg c for RA10A model Outdoor super heat T12 Suction Temp Te Saturation temperature User Manual UM 08 M01 MS 42 Other Available Setting Connection OParam 1 Modify OutParam Defrot curve A point 5 Defrot curve B point 24 Defrot finish temperature 5 A Defrot interval time jas Defrot Operation Time Defrot delay time E Operation object Master unit C Slave unit This is to manually control the opening of the EXV It is only applicable for MDS B series outdoor EXV1 2 3 is only use during heating cycle It remains shut during cooling or defrosts cycle These EXV will not be available in cooling only model EXV 4 is only use during cooling cycle and remains shut during heating cycle Ite
39. aster amp Slave Combination MDS260 320BR please refer to the base model for reference Example MDS260BR please refer to MDS120BR Master and MDS150BR Slave as reference User Manual UM 08 M01 MS 68 Appendix V R410A MDS B Series Cooling Cycle Reference Model MDS 080 Ambient Indoor DB 21 15 27 19 29 19 Se e a tbe Condition NI AES m Wu Piping Branch Pipe Total Piping Length Refrigerant Volume kg 10 8 Outdoor Total Current Indoor Unit 218 218 218 218 256 256 256 256 272 272 272 EXV STEP 256 Pressure Pressure bar Low Pressure Discharge TH1 S C Inlet TH9 Ontour S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor Unit Coil Mid Tm Coil Out To n lt Hei N N Ambient Indoor Temp Outdoor Quantity Indoor Unit Quantity In Operation Condition Piping Branch Pipe Total Piping Length Refrigerant Volume Volume Outdoor Total a o Se wa Opening S C EXV4 ESA CS 131 High Pressure Pressure bar e NENEN N co olw d Low Pressure Discharge THT Auen on a M sa e E99 T 8 Eme ea m door Goi Mat dM User Manual UM OG MO MS 69 Model MDS B BR Indoor Temp Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe
40. d compressor 2 operating current too high overload compressor 2 protector OL2 on overloaded Fixed compressor 3 overloaded Digital compressor operating current too high 1 Check if the overload protector current setting is correct accordin overload protector OL4 on p g g to wire diagram Fixed compressor 1 operating current too high overload protector OL1 on 2 Check if the corresponding compressor resistance is abnormal SS Fixed compressor 3 operating current too high overload protector OL3 on SR O s s a 1 Outdoor motor broken cooling 2 Outdoor circulating air short circuit cooling Check outdoor and solve it 3 Outdoor heat exchanger too dirty cooling 4 Outdoor ball valve not on heating 5 Indoor circulating air short circuit heating 6 Indoor heat exchanger too dirty heating Check indoor unit and solve it 7 Indoor unit filter blocked by dirt heating 8 Indoor EXV not on properly heating Check EXV and controller and solve it 9 Refrigerant over charged Release some refrigerant properly 10 Outdoor PCB high pressure output port abnormal Change PCB 11 Pressure sensor broken Change pressure sensor 12 Pressure switch broken Change pressure switch High pressure too high User Manual UM OG MO MS 52 Malfunction E ME High pressure 1 High pressure sensor communication wire broken Check if high pressure sensor resistance is normal a
41. d to solve it Change sensor TH12 51 Malfunction instruction Fo Outdoor storage 1 Outdoor PCB chip read faultily at the very beginning when Press the outdoor reset button Malfunction 2 Outdoor PCB chip broken Change PCB Indoor inlet coil 1 sensor Indoor units Tin sensor broken or loose malfunction Indoor midlet coil sensor Indoor units Tmid sensor broken or loose value is proper or change sensor malfunction Indoor outlet coil sensor Indoor units Tout sensor broken or loose malfunction ndoor return air FA Sensor broken Indoor units Troom sensor broken or loose F5 ndoor supply air en sensor broken Indoor units Troom sensor broken or loose Check communication wire and solve it tele Wired controller communication wire not connected or loose Change Wired controller controller communication Wired controller broken Change outdoor PCB malfunction Outdoor PCB broken di 8 Outdoor ambient temperature exceed running range Not run to protect units Ambient cooling running range O 48 temperature heating running range 15 30_ exceed z running Outdoor circulating air short range cause outdoor ambient temperature rising to exceed running range when cooling Check outdoor units and solve it cause outdoor ambient temperature falling to exceed running range when 4 way valve Refrigerant leak Preserved
42. different If the COM port goes more than 10 kindly contact your PC supplier to rectify the issue I M ET Parameter Setting juo Port Mo Of Outdoor NILS nn CON LJ amp COM 3 mum nnn nnn Min Operating Interval COMS COME Min Operating Time C OMS OMD Locked Time COMO m Off Time gt gt Co Figure 17 Parameter Setting Manual User Manual UM 08 M01 MS 35 After the setting of the port is completed the user can connect to the system 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 and Outdoor will be visible si McQuay Smart Commander lolx File E Function E HelpiH Circuit Monitor Server Monitor Identity Single Back Page Page Mode Cooling Edition 0 1 No 0 MDSO80B410 Cout 0 0 Tsh out 0 0 Compl DIG 0 Comp2 FIX OFF Ts 20 0 MCCODBT Ti 0 0 THY 0 E 0 Ts 20 0 MCCOLOT Comp3 FIX a Ti 0 0 Can 0 Conp4 FIX l STOP FANE HS 0 0 ber LS 0 0 ber i e 0 Ts 20 0G Werner mont EXV 0 i Ts 20 00 MCCUIST i EXV 0 Ts 20 0 C MCCOZOT Ti 0 0 Emy D p 20 m D Ts 0 0 C 25 sores L mam Ti n D TE 0 TH12 0 0 Ts 20 0 MCCOSOT 0 0 EXV 0 Ts 20 0 C MCCOMOT pn EXV
43. e Ld sas Las uM Connect the screen cable to any ground terminal on the first OUTLOOO II Figure 13 MDS A Series Outdoor Connections For the last MDS Outdoor A series the jumper JP1 and JP2 needs to be shorted The jumpers is just above the orange and green colour terminal Jumper JP1 and JP2 Figure 14 Location of Jumper JP1 amp JP2 in Outdoor MDS A Series PCB User Manual UM 08 M01 MS 13 While using the smart commander Central Control amp Monitoring Software or the commissioning software the outdoor need to be connected to the gateway first before connect to the computer either a desktop or a laptop See Figure 15 Outdoor PCB 1 MDS A E Connect the screen cable to any ground terminal on the first outdoor unit Connection between outdoor to gateway KRESS ARERR NNN Figure 15 MDS A Series Outdoor Connections Smart Commander Gateway For MDS B series the wiring connection to link all the outdoor together is different As mention in the indoor to outdoor connection for MDS B series the terminal on the PCB Apc and Bpc is already wired to a set of terminal block allowing easier access to perform the wiring connection Different model will have different terminal R 22 Model Terminal Number for A Terminal Number for B MDS180 200 220 240B BR 47 48 R 410A Model Terminal Number for A Terminal Number for B 5MDS080 10
44. e Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor il Mi Unit Coil Mid Tm Coil Out To User Manual UM 08 M01 MS 77 o ec Ambient DB Temp We Quantity Unit Quantity In Operation ER 21 15 Condition 9 on Es st sis em Pressure Pressure S ie SEA c e EC For Master amp Slave Combination 5MDS260 500BR please refer to the base model for reference Example 5MDS260BR please refer to 5MDS120BR Master and 5MDS140BR Slave as reference For 5MDS500BR please refer to SMDS240BR for both master and salve Coil In Ti Indoor Unit Coil Mid Tm Coil Out To User Manual UM OG MO MS 79 McQuay 2008 McQuay International 800 432 1342 www mcquay com UM 08 M01 MS
45. ed 6 Slave unit PCB high pressure output port abnormal 7 Slave unit pressure sensor broken 8 Slave unit Pressure switch broken 1 Slave unit high pressure sensor connecting wire broken slave unit High pressure 35 sensor malfunction slave unit 2 Slave unit PCB HS port broken Replace slave unit PCB Discharge 36 tem LL Preserved too high slave unit 1 Indoor motor not work when cooling Check motor and solve it so protect 4 Slave unit EXV opening degree abnormal when heating L S DITO DY slave unit Low pressure GE 5 Slave unit PCB low pressure output port abnormal Change PCB 6 Slave unit Low pressure sensor broken Change pressure sensor Low pressure 1 Slave unit Low pressure sensor connecting wire broken Check if low pressure sensor resistance value is normal and solve it 42 sensor broxen gt Slave unit PCB LS port broken Change PCB A User Manual UM 08 M01 MS 5 E Appendix Appendix I R22 MDS A Series Cooling Cycle Reference Item Condition Outdoor Unit EXV Opening Pressure Temp Item Condition Outdoor Unit EXV Opening Pressure Temp User Manual UM 08 M01 MS 030 Ambient Indoor DB 21 15 27 19 32 23 Outdoor WB 18 Indoor Unit Piping Refrigerant Volume Total Current Volts Indoor Unit 150 TEP S is EXVA Compressor Bottom Coil In Ti Coil Mid Tm Coil Out To Indoor Unit
46. en to install the driver Once the driver installation is completed the following screen will appeared 2 Sentinel Protection Installer 7 3 0 InstallShield Wizard InstallShield Wizard Completed 1 The InstallShield Wizard has successfully installed Sentinel Protection Installer 7 3 0 Click Finish to exit the wizard Protection installer Figure 1 Content inside the Commissioning Kit After completion of the USB dongle driver installation the user will need to install the Smart Commander Service version software Inside the CD beside that installation file Smart Commander there is also a file Smart Commander Serial Number which consists the serial number for the software Files Currently on the CD SPI730 Smart Commander Smart Commander Installation Guide Smart Commander Serial Number Figure 5 Content inside the CD Upon initiating the Smart Commander installation file please follow the instruction on the prompt up screen until you reach the following screen which required for serial number Install Shield Wizard Customer Information Please enter your information rebel eres a Figure 6 Request for Customer Information User Manual UM 08 M01 MS 30 Kindly use the serial number from the txt inside CD Rom and key is the necessary information requested Once completed click on Next and follow the instruction the prompt up screen Once the software installat
47. ensor broken 12 Pressure switch broken 1 Outdoor ball valve not turn on cooling System Low pressure malfunction occur 3 times within 1 hours malfunction 2 Refrigerant leakage or shortage 3 Outdoor unit PCB low pressure output port malfunction 4 Low pressure sensor broken 1 Outdoor unit motor broken cooling 2 Outdoor circulating air short cooling Too high discharge temperature Once 3 Outdoor heat exchanger too dirty cooling 4 Outdoor unit EXV not turn on properly heating 5 Indoor unit EXV not turn on properly 6 Refrigerant leakage or shortage T Outdoor ball valve not turns on 1 Too much current flow in the compressor Compressor overload P protector shut and occurs 3 times 2 Compressor overload protector protecting value wrongly set TH1 open short circuit Outdoor discharge temperature sensor TH1 broken or loose discharge T TH2 open 2 short circuit Outdoor 14 condenser inlet coil temperature sensor TH2 broken or loose 1 inlet coil TH3 open short circuit Outdoor 1 condenser midlet coil temperature sensor TH3 broken or loose 1 midlet coil TH4 open short E4 circuit 2 inlet coil TH5 open short E5 circuit Outdoor 2 condenser midlet coil temperature sensor TH5 broken or loose 2 midlet coil TH6 open short EG circuit Outdoor 3 condenser inlet coil temperature sensor TH6 broken or loose 3 inlet coil TH7 open shor
48. ent NH Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti de Mid Tm Coil Out To E Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts Eau Indoor Unit Opening s c EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti de Coil Mid Tm Coil Out To User Manual UM 08 M01 MS 76 Ambient Indoor emp Outdoor Quantity 10 o Model MDS 200 Ambient DB E WE 21 15 Indoor i i ER Unit Quantity In Operation 4 4 4 Condition 4 Moe f oso oo oso 050 oso oso oso oso oso oo Piping Branch Pipe Opening S C EXV4 178 118 Pressure bar S C vam Temp Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Suction TH12 Compressor Bottom Coil In Ti Indoor coil Mid Tm Unit Coil Out To Model MDS B BR Ambient Indoor Temp Outdoor Quantity Indoor Quantity In Operation Condition m Model Main Pip
49. erant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor Coil Mid Tm Uni Coil Out To User Manual UM 08 M01 MS 72 Model MDS B BR Ambient SE Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts G S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Coil In Ti deg Coil Mid Tm Coil Out To bar For Master amp Slave Combination 5MDS260 500B BR please refer to the base model for reference Example 5MDS260B BR please refer to 5MDS120B BR Master and 5MDS140B BR Slave as reference For 5MDS500B BR please refer to 5MDS240B BR for both master and salve User Manual UM 08 M01 MS 264 re Appendix VI R410A MDS B Series Heating Cycle Reference Model MDS B BR 080 ma Indoor DB _ a Indoor 3 28 0 Pressure Low Pressure 4 Outdoor Unit Temp rom Eu Indoor Unit E Model MDS 100 Ambient Indoor DB Quantity In Operation Condition Indoor 4 4 Piping Branch Pipe
50. function slave Figure 8 MDS Wired Controller MC301 Error Code 55 28 4wv malfunction slave 56 29 Refrigerantleakage slave 57 30 Digital comp overload slave 58 31 Fixed comploverload slave 59 32 Fixedcomp2overload slave 60 33 Fixed comp3 overload slave 61 34 High pressure too high slave 62 35 Sensor broken high pressure slave 63 36 Discharge temp too high slave 64 40 Superheattoolow slave 65 41 Low pressure too low slave 66 42 Sensor broken low pressure slave User Manual UM 08 M01 MS 50 Possible Root Caused and Troubleshooting Guide The following table shows some possible caused when certain error code appeared However this can only be use as reference due to every installation is different and the cause is possible different also Malfunction instruction 1 Outdoor unit motor broken cooling 2 Outdoor circulating air short cooling 3 Outdoor heat exchanger too dirty cooling 4 Outdoor ball valve not turn on heating 5 Indoor circulating air short heating High pressure malfunction occur 3 times within 1 hours 6 Indoor heat exchanger too dirty heating 7 Indoor unit filter web blocked heating 8 Indoor unit EXV not turn on properly heating 9 Too much refrigerant 10 Outdoor unit PCB high pressure output port malfunction 11 Pressure s
51. he outdoor address number cannot skip For example if there are only 4 outdoors in a system the outdoor address needs to be 0 1 2 and 3 l It is advisable that the outdoor address follow the sequence of the communication wiring For example for a 4 outdoors in the system the first outdoor after the gateway should have address 0 the next outdoor address should be 1 and the last outdoor of the communication wiring should be 3 Dipswitch S3 ON 1 ss mmmn 0 1 2 3 4 A Outdoor unit capacity Figure 29 Dipswitch S3 For Dipswitch S3 the main function is to determine the MDS B series outdoor capacity Besides this dipswitch dipswitch S2 3 is also interrelated The setting of the capacity is as follow Outdoor Capacity 52 3 3 1 53 3 53 4 MDS A MDS B Outdoor Capacity 3HP S23 3 1 S32 53 3 53 4 MDS A MDS B 10 HP SHP ze o CR 2 _ t Af Af A N Figure 30 Outdoor Unit Capacity Setting User Manual UM 08 M01 MS 28 Commissioning Software Smart Commander is the MDS software use to perform commissioning and troubleshooting of MDS system It is recommended that service personnel to use this software while commissioning MDS system The hardware and software requirement for the software are as follow Processor Speed 800MHz or above e RAM 256M or above e Hard Disk space 4G or above Operating System Windows 2000 or X
52. indoor unit is turned ON The water pump will stop operation if the water level sensor become OPEN condition For dipswitch 51 4 until 51 6 currently is reserve for future used User Manual UM 08 M01 MS 18 Dipswitch 2 SW2 s2B8EEEEM ia 1 2 3 4 5 6 mmm em Address Dipswitch 2 SW2 Dipswitch 2 SW2 is used for address setting Each indoor unit within the same outdoor unit must have different address Figure 6 shows the indoor address setting 921 522 523 524 525 S26 IndoorAddress of O Figure 6 MDS Indoor Address Reference While setting the indoor address there are a few rules need to follow The rules are as follow a Each indoor number must be unique The indoor address cannot duplicate b The first indoor address must be 0 Do not start the first indoor with address 1 c While setting the indoor address the indoor address number cannot skip For example if there are only A indoors a system the indoor address needs to be 0 1 2 and 3 d It is advisable that the indoor address follow the sequence of the communication wiring For example for a 4 indoors in the system the first indoor after the outdoor should have address 0 the next indoor address should be 1 and the last indoor of the communication wiring should be 3 pum Outdoor LB Example Address 0 1 ON n 52 1 52 6 Address 1 Indoor 2 52 1 52 6 Address 2 1 2 1
53. ion between the outdoor and indoor is not stable It may cause the outdoor model to trip after some time of operation For Indoor PCB shown in Figure 11 and 12 the communication jumper is labeled with the name JP1 The location are shown below Outdoor Last Indoor Unit Jumper JP1 need to be shorted Figure 10 MDS Outdoor to Indoor Communication Wiring Communication Jumper JP1 Communication Jumper JP1 Outdoor to Indoor Connection Green Connector Outdoor to Indoor Connection Green Connector Figure 11 Location of Jumper JP1 on Figure 12 Location of Jumper JP1 on Standard MDS Indoor PCB MDS Wall Mounted Size 20 amp 25 PCB User Manual UM 08 M01 MS 12 MDS Gateway to Outdoor Wiring For outdoor wiring connection it is only required when there is a series of outdoors connected and control by the central control and monitoring software The type of wiring will be similar to those used in the indoor to outdoor communication For outdoor model there are two type of outdoor board The terminal is labeled with A amp The location of the terminal varies base on type of outdoor PCB as mention before Type 1 MDS030 070A AR MDS A board 2 MDS080 320B BR MDS B Board For MDS the outdoor to outdoor communication wire will need to be terminate on the orange terminal The connection is shown as Figure 13 MDS A Series Outdoor PCB DR A e
54. ion is completed the prompt up screen will disappeared In order to confirm whether the software is already installed or not the user can checked it under the program location All Programs de Smart Commander ne zi os Smart Commander 19 Figure 7 Smart Commander Installation is Completed To start up the software user will need to insert the USB dongle key into the PC This USB key is crucial as every time the commissioning software is executed or in operation the software will refer to this key Only remove this after the commissioning software is closed Wiring Connection The wiring connection from the gateway to the outdoor unit will be as follow First Outdoor with MDS A PCB Connect the screen cable to any ground terminal on the first outdoor unit Connection between outdoor to gateway SENEN NC O 4 SY N Figure 8 MDS A Series Outdoor Connections to Smart Commander Gateway Outdoor PCB Gateway MDS B Figure 9 MDS B Series User Manual UM 08 M01 MS 31 For MDS B series the connection will be directly from terminal to the gateway A connect to A1 and to B1 The A and B will vary base on the model and reference are as follow R 22 Model Terminal Number for A Terminal Number for B 48 MDS180 200 220 240B BR 47 R 410A Model Terminal Number for A Terminal Number for B 5MDS80 100 120 140 160 180 260 280 300 320 340 360B BR 7 31 5MDS200 220 240 380 400 420 440 4
55. ition 4 516 959 59 556 945 686 EEN E j Total Piping Length Total Piping Length Length 58 89 Pressure 2 17 6 20 8 Pressure Outdoor Unit Temp SE SS We Model MDS B BR 200 en mise M Temp Outdoor Quantity Quantiy Ta Opera nn Condition Vode Ee vs 050 050 50 050 050 050 00 _ o 15 LI 15 Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor Unit Coil Mid Tm Coil Out To User Manual UM 08 M01 MS 60 U H Di Model MDS 220 Ambient DB 2015 i LU Condition ie aa ea To AE MESSE 3 S Piping Branch Pipe Total Total PipingLength Length Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Suction TH12 Compressor Bottom Coil In Ti Coil Mid Tm Coil Out To Model MDS B BR Ambient ndoor DB 27 19 27 19 27 19 uL WW El Condition Quantity Indoor Quantity In Operation ee Wem ss Tes se ae s os om on o TEE
56. l operation control order is only applicable for heatpump model and be activated during heating cycle Once the button is selected the outdoor will automatically go into defrost cycle The duration for the defrost cycle will be 10 minutes Open valve control order when testing is useful during commissioning Once this button is selected all EXV will open to fully 480 steps This function is only valid for B model To resume normal operation just press on the reset button located on the MDS B Series Outdoor PCB 0 D lt EE 4 H SUES I 4 I rg TE RENE Ae Ee rg k IM B E A K a A St gt ee Figure 34 Reset Button Series Outdoor PCB Service Monitor Service monitor interface is used to plot graph by using the MDS system parameter By view on the graph it will provide observation on the system operation condition Total 5 parameters outdoor or indoors can be selected Ex imi McQuay Smart Commander File F Function E Help H Circuit Monitor Server Monitor First Page Back Page Next Page End Page Set Param Output Data Figure 35 Service Monitor Window User Manual UM 08 M01 MS 44 There are totally 6 function button the Service Monitor The function of the button are as follow First page Proceed to the first page of the graph Back page Proceed to the previous page Next page Proceed to next page End page Pr
57. m Coil Out To o 3 Ki D 3 CH 2 Ambient Outdoor Quantity ge Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor il Mi Unit Coil Mid Tm Coil Out To User Manual UM OG MO MS 67 Model MDS B BR Ambient ROT Temp Outdoor Quantity Indoor Quantity In Operation Condition Model Main Pipe Piping Branch Pipe Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXV4 High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S C Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti ceo Coil Mid Tm Coil Out To C Ambient Indoor Temp Outdoor Quantity wa Quantity In Operation Condition Model Main Pipe Piping Total Piping Length Refrigerant Volume Outdoor Total Current Unit Volts EXV Indoor Unit Opening S C EXVA High Pressure Pressure Low Pressure Discharge TH1 S C Inlet TH9 Outdoor S Outlet TH10 Unit S C Bypass Outlet TH11 Temp Suction TH12 Compressor Bottom Coil In Ti Indoor Coil Mid Tm Uni Coil Out To For M
58. m it is required to have communication wiring between the outdoor and all indoors The wiring is required to be connected serially Daisy chain inside a conduit See Figure 2 Please take note that the communication wiring cannot mix inside a same conduit with power supply Figure 2 MDS outdoor to indoor Communication Wiring Figure 1 shows the type of wiring that the factory recommends for MDS communication wiring A screen cable is recommended because the screen cable will help to filter the electrical noise along the communication wiring and thus help to maintain stability on the communication For outdoor model there are two type of outdoor board The wiring connection from the outdoor PCB to indoors is slightly different The terminal to be connected the outdoor PCB are labeled as A and B Type 1 MDS030 070A AR MDS A board Type 2 MDS080 320B BR MDS B Board User Manual UM 08 M01 MS 8 For MDS A series there are two wiring connectors located at the bottom left of the PCB one of it is green colour and the other is orange color For outdoor to indoor communication the communication wire need to be connected to the green terminal The label of the terminals are and Outdoor PCB etl A 3 L HK lt Hm kd Connect the screen cable to a ground terminal on the Outdoqr unit Indoor PCB Figure 3 MDS A Series Outdo
59. m 1 For future provision Not applicable nS l Item 2 u GIP elit Compensation for long piping application Default setting is 10 R Setting range from 10 to 50 To increase capacity of outdoor during low load j 0 Ms condition only few indoors turned Example 2 0 Setting at 15 The indoor capacity will be multiply by 1 5 times When the piping is long the outdoor will increase the output capacity to match the losses along the 3 0 piping to ensure the indoor received the sufficient capacity Item 3 Compensation for heating cycle Default value is 37 Deg 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 button is selected a new window will prompt O 0utdoor Unit Indoor Unit Number 40 Manual Defrost Especial Operation Control Order Open Vale Control Order for Testing shield the communication between outdoor unit and indoor unit 44 78 a8 p 10 124 1358 144 154 15 17 amp 188 198 204 212 238 24 25 272 288 288 30 318 S pss musesdsss m ms usus 402 414 428 438 444 458 478 OK Canral Figure 33 Special Order Manual User Manual UM 08 M01 MS 43 Manual defrost specia
60. nd solve it 5 sensor malfunction 2 Outdoor PCB HS port broken Change PCB 1 Outdoor motor broken cooling IL 2 Outdoor circulation air short circuit cooling Check outdoor and solve it 3 Outdoor heat exchanger too dirty cooling 4 Outdoor EXV not on properly heating 6 Refrigerant leakage or insufficient 1 Indoor motor not work when cooling Check motor and solve it 1 Check if indoor coil sensor loose or broken 2 Indoor EXV opening degree abnormal when cooling 3 Outdoor motor not work when heating 4 Outdoor EXV opening degree abnormal when heating 5 Low pressure sensor abnormal 6 Refrigerant over charged Release some refrigerant 1 Outdoor ball valve not on heating Check if ball valve switched on completely 2 Outdoor heat exchanger efficiency too low when heating Check outdoor and solve it 3 Outdoor motor run abnormally when heating Check outdoor motor and solve it 4 Refrigerant leakage or insufficient Refill some refrigerant 5 Outdoor PCB low pressure output port abnormal Change PCB 6 Low pressure sensor broken Change pressure sensor Low pressure 1 Low pressure sensor connecting wire broken Check if low pressure sensor resistance value is normal and solve it L2 sensor broken 2 Outdoor PCB LS port broken Change PCB Indoor and mE Check if communication wire normal L3 outdoor Outdoor work normal but all indoor communication abnormal communication Check if i
61. ndoor PCB normal 1 Slave unit high pressure malfunction occurred 3 times Discharge temperature too high L O A A A A A ES 9 N O a Super heat protecting value too small Low pressure too low IN System malfunction slave unit 2 Low pressure malfunction occurred 3 times Reference 2 1 1 EO trouble 3 Discharge temp too high 1 times 4 Compressor overload protector jumped for 3 times TH1 open short 11 circuit slave Slave unit discharge temp sensor TH1 broken or loose unit discharge TH2 open short 12 Kar unit Slave unit 1 inlet coil temp sensor TH2 broken or loose Check if resistance properly choose or change sensor inlet coi TH3 open short circuit E unit Slave unit 1 midlet coil temp sensor broken or loose 1 midlet coil TH4 open short 4 circuit slave Slave unit 2 inlet coil temp sensor TH4 broken or loose unit 2 inlet coil TH5 open short Slave unit 2 midlet coil temp sensor 5 broken midlet coil TH6 open short 46 circuit slave Slave unit 3 inlet coil temp sensor TH4 broken or loose unit 3 inlet coil TH7 open short circuit slave unit 3 Slave unit 3 midlet coil temp sensor TH7 broken or loose midlet coil 8 open short Pape Slave unit ambient temp sensor TH8 broken or loose temp 1 TH9 open short ci
62. oceed to the last page Figure 36 Function Button By clicking on the Set Parameter button a new window will prompt out allowing user to determine which parameter to plot Major unit Set Param 5 pcr x Tick to select ID Y1 Y2 arameter to be Outdoor Indoor 7j v Inabar Unit Outdoor Indoor Indoor Unit H Unit No Unit No Unit p rj Unit No displayed Name T Data Item Ti sl F Display Name Im Data Itam TH1 V Display Upper Lower E i 80 Limit 10 Unit Seale 5 Upper 130 Lower 30 Unit Scale NA Y Outdoor Indoor Outdoor Indoor Indoor Unit Indoor Unit Unit No p d Unit No p d Unit No d Unit No ECK B Data EXV sl M Display Name Hs Data Item 5 gt Display Max value of Y axis Lower 0 Unit Scale 30 Upper Lower 0 Unit Scale YS Option Outdoor Indoor i i o Indoor Unit X Axis Unit No Unit No C Real Time de T 5 Data Wem TH8 zl M Display C History data Min value of Y axis im Lower 30 Unit Scale e InputData HELEEMDSP40BRA OO 20931 Click to display Display the data Display the data Input the graph of selection date of real time file Figure 37 Parameter Selection Screen This option allowed user to extract the data out and send back to the factory for analysis The file generated will be with the extension Example After the u
63. or to Indoor Connection For MDS B Series for MDS B Series the A and B terminals are alreadywired from the PCB to terminal block Different model has different terminal number R 22 Model Terminal Number for A Terminal Number for B MDS180 200 220 240B BR R 410A Model Terminal Number for A Terminal Number for B 5MDS080 100 120 140 160 180B BR 5MDS200 220 240B BR Figure 4 MDS B Series Terminal Number References Terminal 30 Terminal 31 Figure 5 MDS 080 100 120 150B BR Communication Terminals User Manual UM 08 M01 MS SS RSS 6444 9 ei c NV 1 d X E Indoor PCB Figure 6 MDS B Series Outdoor to Indoor Connection For master amp slave model the communication connection is slightly different From the master unit A amp B the communication wiring need to connect to the salve unit amp B before connect to the indoors Similarly to ease installation these communication terminals are already wired from the PCB to terminal block Different model has different terminal number R22 Model Master Model Salve Model MDS 260B BR MDS 120B R M MDS 150B R S MDS 280B BR MDS 130B R M MDS 150B R S MDS 300B BR MDS 150B R M MDS 150B R S MDS 320B BR MDS 160B R M MDS 160B R S R22 Model Master Unit Terminal Number for A Terminal Number for B MDS120 130 150 160BM BRM 30 31 R22 Model Slave Unit Terminal Number for A Terminal Number for PB MDS150 160BS BRS 32 33 Figure
64. r Indoor Data Type of indoor and model EXCEL m 0 0 f Ts 20 0 MCCOLST 0 0 fy 1 0 0 gt EXV 0 Tr Return Air Temperature E T LAL To Coil Outlet Temperature Tr 20 055 Ts 20 0 MCCOI8T To 0 0 T ge Een 0 0 TH EX 0 www 20 04 MCCO20T 0 0 a 1 0 Ti 0 0 CEV D Tm Coil Middle Temperature Ti Coil Inlet Temperature Tr 20 055 o i5 Ts Set Temperature EXV Indoor Opening ee 20 05 MNCC025T 00 1 Here EKV 0 EET SE Tr 20 0 Ts 20 0 To DD E 0 0 EXV 0 H DS 0 JESS SU oe Ts 20 Ard Ge Pa ua 0 0 ee e prre Indoor address i Ki e Down Next Page EEN WEE Figure 23 Indoor Unit Control and Monitoring User Manual UM 08 M01 MS 38 There are two ways to scroll to the unit if it is not shown in the screen The first way is to click on the Up Down Back Page or Next Page button By pressing on the Up Down button the indoor unit will ascend descend accordingly By clickling on the Back Page or Next Page but ton the whole set indoors will be change e 7L Down Next second way is to enter indoor address number the H Indoor Address location This will directly display the indoor the user selected to view 1 i
65. rcuit slave unit total outlet coil Slave unit outlet coil temp sensor TH9 broken or loose 9 TH10 open short circuit Slave unit sub cooling outlet coil temp slave unit sub sensor TH10 broken or loose cooling outlet TH11 open short circuit Slave unit super cooling suction temp slave unit sensor TH11 broken or loose super cooling suction temp UJ TH12 open short circuit slave unit Slave unit suction temp sensor TH12 broken or loose suction temp Premise part indoor communication failure Check malfunctioned indoor units and solve it Emerqency run 1 Slave unit suction super heat less than 1_ for 1F SST 15 minutes persistently Refrigerant over charged 2 Slave unit TH12 malfunction Solve TH12 problem User Manual UM 08 M01 MS 5 LA Malfunction Mai V ain cause A Code instruction ction Outdoor storage 1 Slave unit PCB chip data read failure by outdoor unit when power on Press reset button on slave unit PCB 0 malfunction slave unit 2 Slave unit PCB chip broken Change slave unit PCB 1 Ambient temp is out of operation limit range a Cooling ambient temp range 0_48_ N N N Not run to protect units Ambient temp is out of operation limit range b Heating ambient temp range 15 30_ 2 Outdoor slave unit circulating air short circuit a Result in ambient temp raising to exceed operation limit range
66. s 91 43 Floppy disk controllers G R Floppy disk drives PLAN IDE ATA ATAPI controllers H Keyboards nar Mice and other pointing devices 9 7 Monitors Wr B Network adapters 7 807 Ports COM amp LPT e M Communications Port 1 ECE Fiats Ll ind SKI Prolific USB 4o Serial Bridge COM3 np ns mmm E M Sound video and game controllers 23 System devices H Universal Serial Bus controllers Figure 15 Device Manager User Manual UM 08 M01 MS 34 Once the port is confirmed kindly initiate the Smart Software The change need to done in the software itself Once the software is finished initiated the user will need to change the COM port setting To do this please go to down menu Function E and select Parameter Setting McQuay Smari Comman der FunctiontEd Kr elp H initiating Error Histor BERR Parameter Setting Skate History Cin m m m s m s s B s w m s s s m s m m s s m n m x Figure 16 Smart Commander A new window will prompt up This is the parameter setting manual To change the communication port go to I O Port and click on the down arrow Base on the previous example the USB to RS232 or Serial Port is COM3 Hence please select COM3 Then click OK Please note that the communication port COM on each laptop will be
67. se select System Figure 13 Control Panel Selection Manual User Manual UM 08 M01 MS 33 Once the system icon is selected another new screen will prompt up Click on the Hardware on the tap manual Once the window show the Hardware Manual select Device Manager System Restore Autorss la Remote General Computer Hame i Hardware Advanced Wang mg nmn mann Device Manager The Device Manager lists the hardware devices installed on your computer Llse the Device Manager to change the properties of any device Drivers Driver Signing lets vou make sure that installed drivers are compatible with Windows Windows Update lets you set up how Windows connects to Windows Update for drivers Hardware Profiles Hardware profiles provide way Far you to set up and store different hardware configurations Hardware Profiles Figure 14 Hardware Manual Again another new window will prompt out This screen show the list of hardware which is available in your PC User will need to expand the Port COM amp LPT to locate the communication port From the example below the USB to RS232 or Serial Port is Please note that the communication port on each laptop will be different If the COM port goes more than 10 kindly contact your PC supplier to rectify the issue Kindly close all prompt up windows once the COM port is confirmed age Disk drives E Display adapters D DVD CD ROM drive
68. sech sch 1 ech A A 1 1 Dipswitch S2 ON 1 52 2 3 4 5 6 7 8 address Outdoor capacity Reserved Master Slave OFF 0 Figure 26 Dipswitch S2 For Dipswitch 2 the main function is to set the outdoor address if the outdoor is connected in a network of outdoors or Central Wired Controller MC303 is used Dipswitch S2 1 is to determine whether the outdoor is a single unit master unit or salve unit Dipswitch S2 3 is related to Dipswitch S3 which is use to determine the capacity of the outdoor This will be cover in dipswitch S3 TYPE OF MODEL Figure 27 Dipswitch S2 1 The PCB will only be set to 0 or OFF when it is a slave unit The setting should be 1 or ON when it is a single outdoor or a master unit User Manual UM 08 M01 MS 27 erer 828 OutdoorAddress 524 525 927 sze Outdoorhadress Figure 28 Dipswitch 52 4 52 8 If the outdoor is not connected to the central control monitoring software Smart Commander the Central Wired Controller MC303 there is no need to set the address If the outdoor is connected with these accessories then the same rules on the indoor setting is applied here also The rules are as follow Each outdoor number must be unique The outdoor address cannot duplicate j The first outdoor address must be 0 Do not start the first outdoor with address 1 k While setting the outdoor address t
69. select Fan mode 3 Select High Fan speed 4 Press the ON OFF button on the wireless handset to complete the setting Once the setting is complete all the indoor LED will be turned off and the unit will remain in standby mode User Manual UM 08 M01 MS 21 To disable Auto Random Restart the steps 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 handset select Fan mode 3 Select Medium Fan speed 4 Press the button on the wireless handset to complete the setting Once the setting is complete all the indoor LED will be turned off and the unit will remain in standby mode Remark After entering the setting mode all indoor LED is ON if there is no operation for 60 seconds it will automatically exit from setting mode MDS Outdoor PCB Setting Similar to indoor there are also some setting needs to be done The unit capacity and model type are usually set before ship out from the factory However it is advisable to check on the dip switch again before power up the outdoor As for the outdoor address it is only required when there is a series of outdoors connected and control by the central control and monitoring software For outdoor model there are two type of outdoor board Type 1 MDS030 070A AR MDS A board Type 2 MDS080 320B BR MDS
70. ser had connected the Smart Commander to the system for sometime but still unable to track the cause The user can then use this function to output the data in a compressed form After that user just need to send this file with extension top to the factory side The factory service personnel will use the input data function mention in Figure 37 to extract the data and analyze x Output Path E Data list 2007 01 09 10 13 11 Figure 38 Data Output Window User Manual UM 08 M01 MS 45 Additional Refrigerant Charge Event the MDS outdoor unit is pre charge with refrigerant from the factory but additional refrigerant is still required This is because the pre charge of refrigerant from the factory may not be sufficient to ensure the whole system work according to design condition due to different piping length There are two ways to know the required additional refrigerant The 1st method is to use the data obtain while designing the system with the selection software The 2nd method is to calculate the total piping length with respective piping diameter liquid size to determine the additional refrigerant Report from Selection Software After using the Selection Software to choose the appropriate model and piping layout user is allowed to generate the information into a form a report From the report itself the proposed additional amount of refrigerant required are stated in the report OD01 MDS120BR410 33 0 37_0kW Actual capaci
71. t E7 circuit 1 midlet coil TH8 open short E8 circuit Outdoor ambient temperature sensor TH8 broken or loose ambient T TH9 open short circuit outlet T E Outdoor 2 condenser inlet coil temperature sensor TH4 broken or loose Outdoor 3 condenser midlet coil temperature sensor TH7 broken or loose Outdoor outlet coil temperature sensor TH9 broken or loose TH10 open short circuit sub cool Outdoor sub cool outlet temperature sensor TH10 broken or loose outlet TH11 open short EB m ee Outdoor sub cool suction temperature sensor TH11 broken or loose suction TH12 open SC circuit Outdoor return air temperature sensor TH12 broken or loose suction On the premise that part of the indoor unit communication malfunction Emergency Note System will shut down if the following occur run 1 System sub heat _1_ for 15 minutes 2 TH12 malfunctions m m Q User Manual UM 08 M01 MS Check outdoor unit and solve the problem Check if the ball valve switched on completely Check indoor unit and solve it Check outdoor unit and solve it Check EXV and solve it Properly add some refrigerant Check if the ball valve switched on completely Check if the compressor running normal if refrigerant is added too much Check overload protecting parameter and set it properly Check if resistance Value is proper or change sensor Check the malfunctioned indoor units an
72. ter sub cool circuit TH11 Sub cool refrigerant temperature after sub cool circuit H12 Compressor suction EXV 1 2 3 Electronic Expansion Valve Opening Steps Fully close during cooling amp defrost cycle Only operate during heating cycle EXVA Sub cool circuit Electronic Expansion Valve Operate during cooling cycle Fully close during heating cycle SV1 2 By pass valve For future provision Figure 21 Outdoor Unit Monitoring If there model does not have the respective sensor it will display _ after the parameter item User Manual UM 08 M01 MS 37 Outdoor Refrigerant Diagram This allows the user to understand the refrigerant circuit within the outdoor unit The different colours on the refrigerant line indicate the type of mode the outdoor model is operating It also shows the sensors location This helps a lot if the user cannot remember the function of the sensor shows in the outdoor unit monitoring chart Outdoor address Outdoor Model Red Line Heating Sensor location Green Line Cooling Dry Black Line Stop Figure 22 Outdoor Refrigerant Diagram Indoor Unit Control and Monitoring When using the Smart Commander the user can activated the indoors via the software This allows troubleshooting can be carried out easily without the needs to go to the indoor itself to turn it on Besides that a list of information on the indoor model is also visible Back Page Ts 20 0 MCCOOST 0 0 EXV e
73. ty ratio 9290 9196 Input 9 7 kW Voltage 380V 3N 50Hz Positive height difference 0 0m The maximum pipe length 25 0m Charge refrigerant 3120 q ndoor cool condipion LDB2 7 0WB 15 ndoor heat condition DB20 0 WB TBS Additional Charge Required Figure 39 Additional Refrigerant Charge Proposed in the Report Calculation Method The second method is to calculate the additional refrigerant charge base on piping length and diameter To use this method the user is required to get the whole piping schematic diagram After that user will need to know the exact pipe length and their respective diameter Then user will need to sum up the piping length used on the liquid pipe only base on different diameter Once the piping length of different diameter is obtained apply the length into the formula below to calculate additional refrigerant required Additional charge amount gt Li Gi Piping Length for 15 88mm X Refrigerant Charge Amount Piping Length for 12 7 X Refrigerant Charge Amount Piping Length for 9 52mm X Refrigerant Charge Amount Piping Length for 6 35mm X Refrigerant Charge Amount User Manual UM 08 M01 MS 46 Caution that the refrigerant charge amount of different pipe diameter varies base type of refrigerant R22 Additonal 5 t 2 0_ Figure 40 Additional Charge Reference for R22 Figure 41 Additional Charge Reference for R410A Which ever method
74. ual UM 08 M01 MS 39 The Control Portion is also separated into 2 parts The first part is to control the operating setting of the indoor unit tem Display Mode Operating model of the indoor unit Stop Cooling Heating Dry Fan Fan Speed The operating fan speed Available speed High Medium Low Set Temp set the required temperature of the indoor Unit C Available range is from 16 C to 30 C The last portion is the function setting of the unit item Sleep Mode Indoor unit to operate in sleep mode Auxiliary Heater To activate additional heater Currently the option is not available Not applicable for conceal ducted mode Locked forbidden the usage of handset during commissioning amp troubleshooting Once reset when the indoor power is turned off Dipswitch Setting Capacit OYLM Indoor Model Troubleshooting Software Displa User Manual UM 08 M01 MS 3 1 S32 533 S34 S3 5 1 MCC011T CCD10C CCD15C 0 0 1 0 0 CCD20C 0 1 o o 0 NMCCO0 CCD25C 0 1 0 1 0 CCD28C 1 1 o 1 0 NCcCOZ O O CCD30C 1 1 1 0 CCD38C 0 1 1 0 NMCCOOT CCD40C 1 1 1 1 0 MCCO4BT CCD50C 1 o o 1 o CCD60C 0 1 o 1 1 a j C C C C WMD09G 0 o 0 1 0 MWMOOT WMD10G 1
75. ucted model using wired controller and it will function during heating cycle or fan mode Figure 2 Dipswitch 1 SW1 Locating the dipswitch 51 1 and 51 2 to ON position will give the PCB ability to control the heater relay The PCB is allows to connect to 2 heaters If only 1 heater is available just locate 51 1 to ON position If 2 heaters are used both 51 1 and 51 2 need to be located to ON position The control algorithm of the heaters is shown below When the set temperature T is higher than room temperature by 0 5 C the heater will be turned ON T T gt 0 5 When the set temperature T is lower than room temperature Tr by 1 C the heater will be turned OFF i T lt 1 Figure 3 Heater Algorithm 1 Heater Only Heater 1 When the set temperature Ts is higher than room temperature Tr by 0 5 C the heater will be turned ON T T gt 0 5 When the set temperature Ts is lower than room temperature Tr by 0 5 C the heater will be turned OFF T T lt 0 5 Heater 2 When the set temperature Ts is higher than room temperature Tr by 1 C the heater will be turned ON T T gt 1 When the set temperature Ts is lower than room temperature Tr by 1 the heater will be turned OFF T T Figure 4 Heater Algorithm 2 Heaters For dipswitch 51 2 Water Pump it will be set to ON position for all ceiling cassette unit The drain pump will operate when the
76. user used to determine the additional refrigerant it is recommended to monitor the parameter of the outdoor model to ensure that the unit is working properly The calculation done is only served as a guideline Outdoor Parameter Reference After the commissioning personnel added in the additional refrigerant it is advisable that they monitor the outdoor parameter In order to guide the commissioning personnel the factory side had provided a set of reference outdoor parameter for reference All together there are 3 set of reference data provided 3 sets for cooling cycle and 3 sets for heating cycle These data will serve as a guide on the possible operating condition of the unit Once the outdoor parameter reach or close to the propose data the charging of the refrigerant can be stop The commissioning personnel will need to continue to monitor the outdoor parameter for sometime 1 2 to 1 hour If the outdoor parameters remain constant or very small movement the commissioning can be concluded For details kindly refer to the following Appendix for the required model Appendix R 22 MDS A Series Cooling Cycle Reference e Appendix Il R 22 MDS B Series Cooling Cycle Reference e Appendix Ill R 22 MDS A Series Heating Cycle Reference Appendix IV R 22 MDS B Series Heating Cycle Reference Appendix V R 410A MDS B Series Cooling Cycle Reference Appendix VI R 410A MDS B Series Heating Cycle Reference User Manual UM OG MO MS 47
77. when cooling Check outdoor and solve it slave unit b Result in ambient temp falling down to exceed operation limit range when heating 4 way valve P I reserv malfunction eserved 28 29 Refrigerant Preserved leakage Digital compressor i i ina i i 30 Ge de Phi essor Fixed compressor 4 operating current too high Check if the overload protector current setting is correct according to overload protector OL4 on wire diagram slave unit Fixed compressor 1 overloaded slave unit Fixed compressor 1 operating current too high Check if corresponding compressor resistance is normal overload protector OL1 on P 9 p Fixed compressor 2 overloaded slave unit Fixed compressor 2 operating current too high overload protector OL2 on N Fixed compressor 3 overloaded slave unit Fixed compressor 3 operating current too high overload protector OL3 on 1 Slave unit motor broken cooling 2 Slave unit circulation air short circuit cooling Check slave unit and solve it 3 Slave unit heat exchanger too dirty cooling 4 Slave unit ball valve not on heatino Check if ball valve switched on completely High pressure 1 Indoor circulation air short circuit heating too high Check indoor and solve it 2 Indoor heat exchanger too dirty heating 3 Indoor unit filter blocked dirt heating 4 Indoor EXV not switched on properly heating 5 Refrigerant over charg

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