Midea MAD020T1N1S1 Technical Manual
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Midea MAD020T1N1S1 Technical Manual

Precision air conditioner
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Midea Precision AC Technical Manual-Down Delivery Series
MCAC-RTSM-2013-04
Midea Precision Air Conditioner
Technical Manual
（Down delivery series）
Midea reserves the right to discontinue, or change specification or designs at any time without
notices and without incurring obligations.
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Summary of Contents for Midea MAD020T1N1S1

  • Page 1 Midea Precision AC Technical Manual-Down Delivery Series MCAC-RTSM-2013-04 Midea Precision Air Conditioner Technical Manual （Down delivery series） Midea reserves the right to discontinue, or change specification or designs at any time without notices and without incurring obligations.

  • Page 2: Table Of Contents

    MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series Content 1. GENERAL INFORMATION ..............3   1.1 M ......................3  EASUREMENTS 1.2 E ....................4  XTERNAL APPEARANCE 1.3 N ......................5  OMENCLATURE 2. SPECIFICATION & PERFORMANCE ..........6   2.1F ........................6 ...
  • Page 3 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 5.1 T ..........65  EMPERATURE HUMIDITY SET POINT SETTING FUNCTION 5.2 Q .......... 65  UERY FUNCTION FOR KEY COMPONENTS OPERATING STATUS 5.3 S ..............67  ETTING FUNCTION OF USING PARAMETERS 5.4 M ..................68 ...

  • Page 4: General Information

    MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series 1. General information 1.1 Measurements Dimension Outdoor unit Type Model Power Supply (mm, W×H×D) (Quantity) Indoor MAD020T1N1S1 895×1,971×870 380V~,3Ph,50Hz 20kW Outdoor MA0331 1,470×988×870 380V~,3Ph,50Hz Indoor MAD025T1N1S1 895×1,971×870 380V~,3Ph,50Hz 25kW Outdoor MA0431 1,470×988×870...

  • Page 5: External Appearance

    Midea Precisi on AC Technic cal Manual M MCAC-PDSM M-2013-01 1.2 Extern nal appear rance Indoor r unit-20kW, , 25kW, 30k Indoor r unit-35kW, , 40kW, 45k kW, 50kW, 6 60kW: Indoor r unit-70kW, , 80kW, 90k...

  • Page 6: Nomenclature

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma a nual-Down Delivery Series Outdoo or unit-Sing gle fan moto Outdoo or unit-Dou uble fan mo tors: 1.3 Nome nclature Indoor un...

  • Page 7: Specification & Performance

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 Outdoo or unit 2. Speci ification n & perfo ormance 2.1Features  V shap pe design hi igh efficient evaporator r with hydro ophilic alumi num fin and d inner groo oved coppe pipe.
  • Page 8 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series  Multiple e protections s: High and low pressur re protection n, discharge temperature re protection n, etc.  The run nning param meter can be e displayed i...

  • Page 9: Refrigerant Circuit

    Midea Precisi on AC Technic cal Manual M M CAC-PDSM M -2013-01 2.2 Refrig gerant circ cuit Single refrigerant t circuit typ e:...
  • Page 10 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series Dual-re efrigerant c circuits type Compr ressor: R41 0A, scroll co ompressor. Evapor rator (Heat exchanger ): Copper tu ube and alum minum fin ty pe heat exc changer.

  • Page 11: Specifications

    Midea Precision AC Technical Manual MCAC-PDSM-2013-01 2.3 Specifications Indoor model MAD020T1N1S1 Outdoor model (×Quantity) MA0331 (×1) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 12 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series Speed r/min No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Fin type Hydrophilic aluminum fin Outdoor coil Ф9.52 Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1,250×914.4 Number of circuits...
  • Page 13 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD025T1N1S1 Outdoor model (×Quantity) MA0431 (×1) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 14 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Fin type Hydrophilic aluminum fin Ф9.52 Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1,250×914.4 Number of circuits Indoor air flow 7,010 Indoor external static pressure Indoor drain pipe I.D.
  • Page 15 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD030T1N1S1 Outdoor model (×Quantity) MA0541 (×1) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 16 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Fin type Hydrophilic aluminum fin Ф9.52 Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1447×1219 Number of circuits Indoor air flow 8,825 Indoor external static pressure Indoor drain pipe I.D.
  • Page 17 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD035T1N1S1 Outdoor model(×Quantity) MA0601 (×1) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 18 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Fin type Hydrophilic aluminum fin Outdoor coil Ф9.52 Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1,448×1,219.2 Number of circuits...
  • Page 19 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD040T2N1S1 Outdoor model(×Quantity) MA0331 (×2) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 20 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Outdoor coil Fin type Hydrophilic aluminum fin (Single Ф9.52 outdoor unit) Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1,250×914.4...
  • Page 21 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD045T1N1S1 Outdoor model(×Quantity) MA0752 (×1) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 22 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Fin type Hydrophilic aluminum fin Outdoor coil Ф9.52 Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1,750×1,219.2 Number of circuits...
  • Page 23 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD050T2N1S1 Outdoor model(×Quantity) MA0431 (×2) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 24 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Outdoor coil Fin type Hydrophilic aluminum fin (Single Ф9.52 outdoor unit) Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1,250×914.4...
  • Page 25 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD060T2N1S1 Outdoor model(×Quantity) MA0541 (×2) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 26 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Outdoor coil Fin type Hydrophilic aluminum fin (Single Ф9.52 outdoor unit) Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1447×1219...
  • Page 27 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD070T2N1S1 Outdoor model(×Quantity) MA0601 (×2) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 28 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Outdoor coil Fin type Hydrophilic aluminum fin (Single Ф9.52 outdoor unit) Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1,448×1,219.2...
  • Page 29 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD080T2N1S1 Outdoor model(×Quantity) MA0752 (×2) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 30 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Outdoor coil Fin type Hydrophilic aluminum fin (Single Ф9.52 outdoor unit) Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 1,750×1,219.2...
  • Page 31 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Indoor model MAD090T2N1S1 Outdoor model(×Quantity) MA0982 (×2) Indoor operating ambient temperature range °C 0~40 Outdoor operating ambient temperature range °C -20~45, (-40~45, with low ambient temperature kit) Altitude ≤1000m (higher than 1000m, derating use)
  • Page 32 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series No. of rows Tube pitch(a)×row pitch(b) 25.4×22 Fin spacing Outdoor coil Fin type Hydrophilic aluminum fin (Single Ф9.52 outdoor unit) Pipe outside dia. and type Inner grooved copper pipe Coil (W×D) 2,250×1,219.2...

  • Page 33: Dimension (Unit : Mm )

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M -2013-01 2.4 Dimen nsion (Uni t: mm) Indoor r unit: MAD0 020T1N1S1 , MAD025T T1N1S1, MA AD030T1N1S...
  • Page 34 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down Delivery Series View of op pened door Indoor r unit: MAD0 035T1N1S1 33 3...
  • Page 35 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 Indoor r unit: MAD0 040T2N1S1 , MAD045T T1N1S1, MA AD050T2N1S S1, MAD060 0T2N1S1 Indoor r unit: MAD0 070T2N1S1 , MAD080T T2N1S1, MA AD090T2N1S...
  • Page 36 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down Delivery Series Outdoo or unit: MA A0331, MA04 431, MA054 41, MA0601 Outdoo or unit: MA A0752, MA09 Mode MA033 MA043 MA054 MA060 MA075 MA098 35 5...

  • Page 37: Service Space

    Midea Precisi on AC Technic cal Manual M M CAC-PDSM M-2013-01 2.5 Servic ce space Indoor r unit (Unit: Outdoo or unit with h horizontal installation n (Unit: mm Outdoo or unit with h vertical ins stallation (U Unit: mm)

  • Page 38: Wiring Diagram

    Midea Precision AC Technical Manual-D Down Delivery Serie e s MCA A C-RTSM-2013-04 2.6 Wiring diag gram E-box view o of indoor unit...
  • Page 39 Midea Precision AC Technical Manual MCAC C -PDSM-2013-01 Indoor unit w with single syst tem- Controlling g connection am mplification figur Available for M MAD020T1N1S1, M MAD025T1N1S1, MA AD030T1N1S1, an d MAD035T1N1S, MAD045T1N1S1 Indoor unit w with dual-system m- Controlling c...
  • Page 40 Midea Precisi on AC Technic cal Manual-Do own Delivery S Series MCAC-RT TSM-2013-04 Outdoo or unit- MA A0331, MA04 431, MA054 41, MA0601 Outdoo or unit- MA A0752, MA09...

  • Page 41: Installation

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 3. Instal llation  The e indoor unit t must be in stalled on th he ground of f the device room or com mputer room m. And the tdoor unit is...
  • Page 42 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series  hen the cond denser is hig gher than co ompressor, i nstall revers se bend on t the inlet and d outlet pipes the conden ser, to avoid...

  • Page 43: Storage Environment

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 3.1 Storag ge environ nment Items Requirement orage environ nment oor, clean. mbient humidi ~85% RH (N No condensa ation) mbient temper rature oor unit: -20 ° °C~54°C; Out tdoor unit: °C~70°C.
  • Page 44 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series  Do not fix the i ndoor unit in n the sunken n place or at t the end of the long and d narrow roo  Do...
  • Page 45 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01  Thr ree-door uni it installation n basing size e: (Unit: mm Spec ification (mm Remar Steel plate ×100×(5~6.5) Angle iron (St teel channel) 40×40 0×3 (50×37×4. Anti-shock ickness: 3~5 Rubber...

  • Page 46: Installing Outdoor Units

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series 3.3 Install ling outdo oor units  ter the unit a arrives, chec ck whether i t is damage ed during the e shipment.  ensure the heat disper...

  • Page 47: Connecting Refrigerant Pipe

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 nit: mm) Mode MA033 1112 MA043 MA054 1310 MA060 1066 1604 MA075 2105 MA098  It i s suggested d that use M M6×20 expan nsion bolt fo r fixing the m mounting ba ase.
  • Page 48 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series ocess, it nee eds to charg ge nitrogen i nto the pipe eline for prot ection.  ake sure the e right conne ecting pipe s size. ...
  • Page 49 Midea Precision AC Technical Manual MCAC-PDSM-2013-01  Do not open the system pipeline more than 15 minutes, or it will lead to freeze the cooling oil and influence the usage lifespan of the key parts in the system and the system operation stability.

  • Page 50: Vacuum And Add Refrigerant

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series e operation o of the comp ressor and i its lifespan.T Trash and fo oreign matte ers may com me into the pe in the pro ocess of pipe e intallation.

  • Page 51: Water Pipe Installation

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 dding amount t of refrigeran nt (kg) = orresponding unit Length additional ref frigerant amo ount (kg/m) ×T Total length o of extend liqu uid pipe (m) The co rresponding g unit length...
  • Page 52 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series B ≥ ≥ P/10+20 (Un nit: mm) A ≥ ≥ B/2 (Unit: m Air outlet sta atic pressure (Unit: Pa)  umidifier also o needs to connect wit th an inlet w water pipe.

  • Page 53: Electric Connection

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 3.7 Electr ic connec ction  the power w wires, contro olling wires a and the gro unding conn nection shou uld observe the national d local regu ulations and electrical ru ules.
  • Page 54 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series  door unit con ntrolling con nnection amp plification fig gure: Sing gle-system type al-system t type  iring refers t to outdoor u nit wiring dia agram, as fo...
  • Page 55 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01  eld wiring, Single-sys stem type Dual-syste m type\  se protection n pipe or shi elding wire f for the outdo oor parts of the connect ting wires of f indoor unit d condense ...

  • Page 56: Trial Run

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series 3.8 Trial ru  troduction of f LCD manu ual operator functions or all th butto ons, when it is displaying g or modifyi ng the opera ation param...
  • Page 57 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 Time: hift to the firs st page of tim me program (K0). Time parameter i s used to di isplay and s et the perating para ameter of clo ock plate an nd activate ti me zone.
  • Page 58 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series  he mechanic cal part:  Make sure e remove th he protective e materials fo or the transp portation. Ch heck the fas stening situation o of motor whe...
  • Page 59 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 and use th he enter key y to move th he cursor po sition, and u use the Dow wn button to carry out the manual o n/off setting of the critica...
  • Page 60 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series  Compressor checking: Press the Set key, the setting temperature to be room temperature minus 5°C, the relative humidity to be the same as the room temperature, and press enter to observe the compressor whether operates or reverses. (The compressor reverse then it will has abnormal voice.)
  • Page 61 Midea Precision AC Technical Manual MCAC-PDSM-2013-01  Safe operation of refrigerant system detection: Operate the compressor, and after the unit is stable operated then check whether there are bubbles in the liquid sight glass. Adjust the thermal expansion valve to the suction degree of overheating be about 5°C~8°C, and each adjustment should not over 1/2 circle and at least observe over 15 minutes every time.

  • Page 62: Control System

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series 4. Contr rol syste 4.1 Table of main co ontrol com mponents and cont rol load Name quantity Cont troller ration displa ayer mperature & h humidity sen...
  • Page 63 Midea Precisi on AC Technic cal Manual M M CAC-PDSM M -2013-01 ompressor 1 1 high press sure ompressor 2 2 high press sure -heater 1 ov verload -heater 2 ov verload hase seque nce protecti ndoor fan ov verload...
  • Page 64 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series  door schema atic diagram utdoor fan fr requency co nversion  Button Mame Func ctions 1, For shiftin ng to system m monitoring sta atus. MON/ESC Monit...

  • Page 65: Main Control Function

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 Accord to th he function cod de to carry ou t one of the fo ollowing functi ons: 1, Change t the operating d direction of inv verter. DIR/JOG Direct tion/Jog...

  • Page 66: Operation

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series 5. Opera ation 5.1 Tempe erature/hu umidity se t point se etting func ction Press S Set in men u, directly e enter the us ser without password,...
  • Page 67 Midea Precisi on AC Technic cal Manual M M CAC-PDSM M-2013-01 Note: Interface es of Ig, Ih, Ii a and Ij display y the humidif fier operating g status.

  • Page 68: Setting Function Of Using Parameters

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series 5.3 Settin g function n of using paramete  ess the Prg button in m menu, it need d password t to enter: Note: er password is 0002.

  • Page 69: Maintenance Management

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 Notes: terface P1 to set the temp erature settin ng range. terface P2, P3 3 and P4 to s et the deviati ion and dead d zone. terface P5 for r some speci al functions a activation.

  • Page 70: Clock Management

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series Notes: ease contact manufacture e for mainten ance passwo ord. eep pressing g Down butt ton, the disp play screen will pop up Type in mai intenance p assword.
  • Page 71 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 Press D Down button n, enter to K K1 interface and type in clock mana gement pas ssword 002. Press ente to ente r K2 interfac ce, then can n use the rela...

  • Page 72: Network Function Introduction

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series 6. Netwo ork func ction int troductio Manua l operator an nd controler r can be con nnected toge ether by RS4 485 network k, to make u...

  • Page 73: Group Control Network Setting

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 6.1 Group p control n network se etting Accord ing to the pr revious pictu ure, an exam mple of how to set group p control net twork will be e given.
  • Page 74 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series  Change e the contro ller address of the devic ce 2. Cut off the controlle er power an d the conne ections betw ween J11 por rt on the con...
  • Page 75 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01  Configu ure the corre esponding re elation of co ontroller and the manual l operator. Press U Up, Down a and enter bu uttons at the same time for at least 5...
  • Page 76 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series and the en press ent ter for confir rmation, the n finish grou up control ne etwork confi iguration of one device.  Set the e manual ope...
  • Page 77 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 Press m menu to exit t the interfac ce of configu uration man agement, an nd press Do own to move e the cursor to the in nterface of p parameter m...
  • Page 78 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series  Wire fig gure of contr roller in grou up control ne etwork. 3-core shielding wi re (large or equal to 0.7 75mm ) is us sed to conne...

  • Page 79: The Ethernet Communication Card Introduction

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01  Cancel group contr rol network.  ose the unit. . Switch off t the controlle er power and d the networ rk connectio ons of contro oller J11 por d other cont trollers.
  • Page 80 MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series Insert the T TCP/IP card d in th corres sponding plu ug-in connec ctor, making g sure it is su ully inserted and in con ntact with the...
  • Page 81 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01 ielding cable e is 1000m.  stallation of RS485 card Remove th he serial car rd placemen nt cover with h a screwdriv Remove th he pre-punc ctured plastic c, the hole w...

  • Page 82: Maintenance

    MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series connector on the card. 6. There is a table of Pin-wiring of the connector stamped on the card. Significato meaning RX+/TX+ RX-/TX- 7. Maintenance 7.1 Electrical maintenance According to the following items to check appearance of the electrical connections and do the relative handlings.

  • Page 83: Filter Screen Maintenance

    Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01  heck the out tput connect tion between n the contro ol connector panel to ea ach contacto or, liquid pipe ectromagnet tic valve, an nd the inpu t connection n between...

  • Page 84: Indoor Fan Components Maintenance

    MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series the filter screen clogging switch. The filter screen clogging switch is located in the electric control box, and collect the large air pressure and filtered air pressure through the white soft hose, and the filter screen clogging switch to compare the two pressure difference to judge the output.
  • Page 85 Midea Precisi on AC Technic cal Manual MCAC-PDSM M-2013-01  struction of t the steam hu umidifier com mponent pa arts which ne eed to maint tain. Item Support frame Water s upply tank + + Conductivi ity meter Water in...

  • Page 86: Electrical Heating Components

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series remove all l the impurit ies and rinse e off.  sassembling g the humidi fication tank Press the Manual dra ainage butto on to empty the water in humidificat tion tank.

  • Page 87: Compressor Monitoring And Replacement

    Midea Precision AC Technical Manual MCAC-PDSM-2013-01 situation of the system. When the water content of system is more than the standard, the liquid sight glass basic color will change from green to yellow. When the refrigeration system has malfunction, judge the error according to some operating parameters of the system.

  • Page 88: Outdoor Fan Maintenance

    MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series 1. Mechanical error The mechanical error of compressor is mostly because that during the installation process it is not strictly accorded to the operation guidelines, and the system refrigerant leakage and improper trial run in the process of the construction and operation, and then cause the compressor return liquid operation in long term.

  • Page 89: Trouble Shooting

    Midea Precision AC Technical Manual MCAC-PDSM-2013-01 8. Trouble shooting When the system is suddenly having a demand, but there is a failure or invalidation which led to non-workable, and then it cannot meet environmental needs. So it is necessary to periodically do the functional test for the system components.
  • Page 90 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series  Common faults and handling methods of humidification system Symptom Probable reason Check items or handling methods Check the water source. No water filling in the humidification tank Check the water inlet solenoid valve is open.
  • Page 91 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Symptom Probable reason Check items or handling methods Air suction and Reverse the compressor or inner air When the compressor was reversed, change exhausting pressure mixed up. any two L wires. Inner air mixed up, change...
  • Page 92 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series the inverter output to stop the motor and make it stay free running condition. If there is alarm, the inverter will display alarm code, and will not cut off the inverter output during alarm state, the motor still be controlled by the inverter.
  • Page 93 Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Select a large power inverter. The inverter power is too small. Check the ambient temperature. Ambient temperature is too high. Inverter overheat error, the Improve the ventilation environment. Ventilation of inverter is not well.

  • Page 94: Accessories

    MCAC-PDSM M-2013-04 Midea a Precision AC Technical Ma anual-Down D elivery Series 9. Acces ssories Indoor unit Name Quantity Shape User’s m manual of ind oor unit Installatio frame water leakage sensor Switch p panel compon nent Door key (Place ed on the do oor plate.)

  • Page 95: Annex I: Alarm Table

    Midea Precision AC Technical Manual MCAC-PDSM-2013-01 Annex I: Alarm table Alarm display Result Probable reason 10s after the low pressure switch is Low pressure compressor 1 Switch off the compressor 1. trigged. 10s after the airflow switch from close to...
  • Page 96 MCAC-PDSM-2013-04 Midea Precision AC Technical Manual-Down Delivery Series Actual current of humidifier is 130% higher than standard current for long Built-in humidifier: high current Switch off humidifier time. After water inlet valve is opened, Built-in humidifier: no water in the...

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