Midea MDV-120W/DGN1 Technical & Service Manual Download Page 76

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MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF

Troubleshooting 73

4.12 P4:Compressor discharged temperature protection

When the discharged temperature of the compressor is higher than 115°C, the unit will stop running.

When the discharged temperature of the compressor is lower than 90°C , the unit resumes normal

operation automatically.

LED

displays

Discharged temperature of the compressor

Check whether the discharged temperature of the compressor is higher

than 115°C.

Check whether the compressor discharged

temperature sensor connects with PCB

correctly according to the wiring diagram.

YES

Judge: check whether resistance of compressor

discharged temperature sensor is correct or not .

Connect correctly again.

YES

Replace outdoor PCB

Judge: whether the discharged temperature sensor

is damaged or not.

Replace compressor discharged

temperature sensor.

Check refrigerant leaks or not.

Stop leaking and then confirm the

refrigerant volume again.

YES

Summary of Contents for MDV-120W/DGN1

Page 1: ...3 phase 380 415V 50 60Hz MDV 120W DGN1 MDV 140W DGN1 MDV 160W DGN1 Model TechnicalServiceManual Mini VRF...

Page 2: ...ormation 1 Part 2 Outdoor Units 9 Part 3 Installation 44 Part 4 Troubleshooting 58 Manufacture reserves the right to discontinue or change at any time specifications or designs without notices and wit...

Page 3: ...R410A All DC Inverter Mini VRF MCAC VTSM 2016 02...

Page 4: ...MCAC VTSM 2016 02 R410A All DC Inverter Mini VRF General Information 1 Part 1 General Information 1 Product Lineup 2 2 Nomenclature 3 3 Features 4 4 Indoor Units Lineup 7...

Page 5: ...oor Units Model name Dimension body mm Net Gross weight kg Power supply MDV 120W DGN1 Width 900 Height 1327 Depth 400 95 105 380 415V 3N 50 60Hz MDV 140W DGN1 Width 900 Height 1327 Depth 400 99 109 38...

Page 6: ...eneral Information 3 2 Nomenclature M D V 120 W D G N1 Note the actual cooling capacity please refer to the nameplate Refrigerant type N1 R410A Power Supply G 380 415V 3N 50 60Hz Inverter Type D DC In...

Page 7: ...tance save more power and enhance heat exchange performance Hydrophilic film fins and inner threaded copper pipes optimize heat exchange efficiency 3 3 Newly designed air outlet grill Optimally design...

Page 8: ...ht commercial areas such as villas restaurants usually it need more than one indoor unit which in turn requires multiple outdoor units Midea s Mini VRF system solves this problem and retains buildings...

Page 9: ...oor unit s address 3 8 More Convenient Piping Connector Branch Box Easier and safer installation thanks to a branch box that simplifies piping work and the adoption of screw connection Both left and r...

Page 10: ...assette Four way cassette 15 18 22 28 36 45 56 71 80 90 100 112 140 Capacity 100W Duct type Low static pressure duct Medium static pressure duct High static pressure duct 15 18 22 28 36 45 56 71 80 90...

Page 11: ...Wall mounted R panel 15 22 28 36 45 56 71 80 90 Note If ODU connect only one IDU the capacity of IDU should be not more than ODU If ODU connect more than one IDU the capacity of each IDU should be not...

Page 12: ...ifications Performance 9 Part 2 Outdoor Units 1 Specifications 10 2 Dimensions 12 3 Service Space 13 4 Piping Diagrams 14 5 Wiring Diagrams 15 6 Field Wiring 16 7 Capacity Tables 17 8 Electric Charact...

Page 13: ...1400ml 100ml VG74 1400ml 100ml VG74 1400ml 250ml Outdoor fan motor Model WZDK100 38G Type DC motor Brand Panasonic Nidec Insulation class E Safe class IP23 Input W 2 100 Output W 2 85 Rated current A...

Page 14: ...length m 100 Max difference in level between indoor units m 8 Ambient temperaure Cooling 15 to 46 Heating 15 to 27 Notes Capacities are based on the following conditions Cooling Indoor temperature 27...

Page 15: ...R410a All DC Inverter Mini VRF MCAC VTSM 2016 02 12 Specifications Performance 2 Dimensions Unit mm MODEL A B C D E F H 120 140 160 900 600 366 320 400 360 1327 H A B C D E F...

Page 16: ...Performance 13 3 Service Space Unit mm 300 600 300 2000 Wall or obstacle Maintain channel Air outlet Air inlet Air inlet Single unit installation 600 2000 300 Parallel connect the two units or above 2...

Page 17: ...ssure liquid receiver It is used to store the liquid refrigerant and oil it can protect the compressor from liquid hammer 4 way valve Closed in cooling mode and open in heating mode Electronic expansi...

Page 18: ...tion Malfunction or Protection EEPROM malfunction Fan Protection A fan in the A region run for more than 5 minutes in Heat mode E9 Eb H4 Communication malfunction betweem IR341 main board PE Indoor ev...

Page 19: ...or Communication Bus Indoor Unit Indoor Unit wire distribution box Switch Circuit breaker Switch Circuit breaker Power wiring outdoor Central control monitor CCM CCM Computer in broken line table user...

Page 20: ...1 0 3 09 12 2 3 48 12 6 3 60 12 8 3 62 13 0 3 64 13 4 3 68 13 8 3 73 41 11 0 3 25 12 1 3 51 12 4 3 63 12 7 3 65 12 8 3 68 13 2 3 69 13 3 3 76 43 11 0 3 33 12 0 3 53 12 4 3 64 12 6 3 67 12 7 3 68 13 0...

Page 21: ...42 11 1 3 13 12 1 3 55 12 3 3 57 12 5 3 58 12 8 3 62 13 1 3 66 41 9 3 2 45 11 1 3 15 12 0 3 57 12 2 3 59 12 4 3 61 12 6 3 64 12 7 3 68 43 9 3 2 47 11 1 3 20 11 9 3 60 12 1 3 62 12 3 3 63 12 5 3 66 12...

Page 22: ...8 3 47 39 7 6 1 85 9 1 2 35 10 6 2 91 11 3 3 21 12 0 3 53 12 3 3 57 12 6 3 59 41 7 6 1 91 9 1 2 45 10 6 3 01 11 3 3 29 12 0 3 55 12 2 3 66 12 5 3 68 43 7 6 2 00 9 1 2 56 10 6 3 12 11 3 3 38 12 0 3 62...

Page 23: ...10 5 2 71 11 7 3 15 39 5 9 1 35 7 1 1 67 8 2 2 04 8 8 2 23 9 4 2 44 10 5 2 88 11 7 3 35 41 5 9 1 41 7 1 1 73 8 2 2 10 8 8 2 31 9 4 2 51 10 5 3 00 11 7 3 50 43 5 9 1 52 7 1 1 85 8 2 2 18 8 8 2 43 9 4 2...

Page 24: ...16 4 3 0 62 5 1 0 72 5 9 0 82 6 3 0 88 6 7 0 93 7 5 1 05 8 4 1 17 18 4 3 0 63 5 1 0 73 5 9 0 84 6 3 0 89 6 7 0 95 7 5 1 07 8 4 1 20 20 4 3 0 64 5 1 0 74 5 9 0 85 6 3 0 91 6 7 0 97 7 5 1 09 8 4 1 22 21...

Page 25: ...83 11 20 3 90 11 16 4 03 7 7 6 11 69 3 58 11 69 3 71 11 64 3 84 11 64 3 91 11 60 3 97 11 60 4 10 5 5 6 12 31 3 70 12 27 3 82 12 22 3 95 12 22 4 01 12 22 4 07 12 18 4 19 3 3 7 12 89 3 81 12 89 3 93 12...

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Page 31: ...3 23 13 0 3 75 39 6 6 1 61 7 9 1 99 9 2 2 43 9 8 2 66 10 4 2 91 11 7 3 43 13 0 4 00 41 6 6 1 68 7 9 2 06 9 2 2 50 9 8 2 75 10 4 3 00 11 7 3 57 13 0 4 17 43 6 6 1 81 7 9 2 21 9 2 2 60 9 8 2 90 10 4 3...

Page 32: ...16 4 7 0 74 5 6 0 86 6 5 0 98 7 0 1 05 7 5 1 12 8 4 1 26 9 3 1 40 18 4 7 0 75 5 6 0 87 6 5 1 00 7 0 1 07 7 5 1 14 8 4 1 28 9 3 1 43 20 4 7 0 76 5 6 0 88 6 5 1 01 7 0 1 08 7 5 1 16 8 4 1 30 9 3 1 46 21...

Page 33: ...0 4 49 12 80 4 58 12 75 4 73 7 7 6 13 36 4 21 13 36 4 36 13 31 4 51 13 31 4 59 13 26 4 66 13 26 4 81 5 5 6 14 07 4 34 14 02 4 49 13 97 4 63 13 97 4 71 13 97 4 78 13 92 4 92 3 3 7 14 73 4 47 14 73 4 61...

Page 34: ...8 5 09 12 68 5 15 12 52 5 20 7 7 6 13 18 4 88 13 18 4 99 13 13 5 11 13 13 5 16 13 13 5 22 12 52 4 97 5 5 6 13 89 4 98 13 84 5 09 13 84 5 20 13 79 5 25 13 44 5 09 12 52 4 67 3 3 7 14 55 5 08 14 55 5 18...

Page 35: ...7 7 6 10 82 4 16 10 21 3 88 9 60 3 61 9 30 3 48 8 99 3 34 8 38 3 09 5 5 6 10 82 3 92 10 21 3 66 9 60 3 41 9 30 3 28 8 99 3 16 8 38 2 92 3 3 7 10 82 3 70 10 21 3 46 9 60 3 22 9 30 3 11 8 99 2 99 8 38...

Page 36: ...15 6 4 89 16 1 5 06 16 4 5 09 16 6 5 12 17 1 5 18 17 6 5 24 41 14 0 4 57 15 4 4 94 15 9 5 10 16 2 5 14 16 4 5 17 17 0 5 19 17 0 5 29 43 14 0 4 69 15 3 4 96 15 8 5 12 16 1 5 16 16 3 5 17 16 7 5 20 16 8...

Page 37: ...14 2 4 41 15 6 5 00 15 8 5 02 16 0 5 05 16 4 5 10 16 9 5 15 41 11 9 3 45 14 2 4 44 15 4 5 03 15 7 5 06 15 9 5 08 16 2 5 13 16 4 5 18 43 11 9 3 49 14 2 4 50 15 3 5 07 15 5 5 09 15 8 5 12 16 1 5 15 16 1...

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Page 39: ...13 4 3 81 14 9 4 44 39 7 5 1 90 9 0 2 36 10 5 2 87 11 2 3 15 11 9 3 44 13 4 4 05 14 9 4 73 41 7 5 1 98 9 0 2 44 10 5 2 96 11 2 3 25 11 9 3 54 13 4 4 22 14 9 4 93 43 7 5 2 14 9 0 2 61 10 5 3 08 11 2 3...

Page 40: ...5 4 0 87 6 5 1 01 7 5 1 16 8 0 1 24 8 5 1 32 9 5 1 49 10 6 1 66 18 5 4 0 89 6 5 1 03 7 5 1 18 8 0 1 26 8 5 1 35 9 5 1 51 10 6 1 69 20 5 4 0 90 6 5 1 04 7 5 1 20 8 0 1 28 8 5 1 37 9 5 1 54 10 6 1 72 21...

Page 41: ...0 5 12 14 00 5 21 13 94 5 39 7 7 6 14 61 4 79 14 61 4 96 14 56 5 14 14 56 5 23 14 50 5 31 14 50 5 48 5 5 6 15 39 4 95 15 33 5 11 15 28 5 28 15 28 5 36 15 28 5 44 15 22 5 60 3 3 7 16 11 5 09 16 11 5 25...

Page 42: ...6 5 80 13 86 5 87 13 70 5 92 7 7 6 14 42 5 55 14 42 5 68 14 36 5 81 14 36 5 88 14 36 5 94 13 70 5 65 5 5 6 15 20 5 67 15 14 5 80 15 14 5 92 15 08 5 98 14 70 5 80 13 70 5 32 3 3 7 15 92 5 78 15 92 5 90...

Page 43: ...67 7 7 6 11 83 4 73 11 17 4 42 10 50 4 11 10 17 3 96 9 83 3 81 9 17 3 52 5 5 6 11 83 4 46 11 17 4 17 10 50 3 88 10 17 3 74 9 83 3 60 9 17 3 33 3 3 7 11 83 4 21 11 17 3 94 10 50 3 67 10 17 3 54 9 83 3...

Page 44: ...TOCA MFA MSC RLA kW FLA MDV 120W DGN1 50 60 380 415 342 456 16 25 15 25 9 95 2 0 1 2 0 9 MDV 140W DGN1 50 60 380 415 342 456 17 5 15 25 9 95 2 0 1 2 0 9 MDV 160W DGN1 50 60 380 415 342 456 17 5 15 25...

Page 45: ...R410a All DC Inverter Mini VRF MCAC VTSM 2016 02 42 Specifications Performance 7 Sound Levels Model Noise level dB A Height m MDV 120W DGN1 57 1 2 MDV 140W DGN1 57 1 2 MDV 160W DGN1 57 1 2 1m H...

Page 46: ...below 80 Heating mode 15 C 27 C 27 C Notes 1 If the unit is running outside the above condition protective device will start and even then the units take place abnormality running 2 These figures base...

Page 47: ...02 44 Installation Part 3 Installation 1 Precautions 45 2 Accessories 46 3 Outdoor Unit Installation 47 4 Piping Installation 49 5 Electric Wiring Installations 53 6 Outdoor Unit Wiring 56 7 Test Runn...

Page 48: ...tion may result in water leakage electric shock or fire Turn off the main power supply switch or breaker before attempting any electrical work Make sure all power switches are off Failure to do so may...

Page 49: ...he terminals Be sure to provide grounding Do not connect ground wires to gas pipes water pipes lightning rods or ground wires for telephone cables Conform to the regulations of the local electric comp...

Page 50: ...not install the unit in a place full of machine oil Do not install the unit in a place full of sulphuric gas Do not install the unit in a place where high frequency radio waves are likely to be gener...

Page 51: ...ront with rear sides All the pictures in this manual are for explanation purpose only They might be slightly different from the air conditioner you purchased depending on model The actual shape shall...

Page 52: ...L shape metal plate otherwise cannot wiring Back out pipe Please wipe off the piping support rubber blanket beside the inner outlet pipe cover of the machine while back side getting out pipes Undersu...

Page 53: ...Indoor Unit The first line Branch Pipe Outdoor unit Pipe Length from the nearest branch pipe equivalent length Maximum pipe equivalent length from the first line branch pipe Maximum pipe equivalent l...

Page 54: ...main pipe the branch pipe and the main pipe of indoor unit A B C D E Note The distance between the first branch to the last indoor unit is more than 15m choose the second connecting method The pipe b...

Page 55: ...Quantity of Indoor unit Total Capacity of Indoor unit 120 model 7 45 130 140 model 8 45 130 160 model 9 45 130 If ODU connect more than one IDU the capacity of each IDU should be not more than 8kW for...

Page 56: ...of copper pipe 15 9mm the thickness of the insulating layer at least more than 20mm Please use attached heat insulating materials to do the heat insulation without clearance for the connecting parts o...

Page 57: ...e is made of material the same as phase line the smallest sectional area of PE line should be in accordance with the regulation below Sectional area of core to phase lines mm Smallest sectional area o...

Page 58: ...cord is parallel with signal wire please put them into separate wire distribution pipes and leave a proper distance Reference distance It is 300mm when current capacity of power cord is less than 10A...

Page 59: ...not use a multi core cable Incorporate the outdoor unit and indoor unit connection wiring system and refrigerant pipe system for the same system The power supply electric leakage protectors and manual...

Page 60: ...tical thickness through follow steps and take necessary actions 1 Calculate the sum of the charge volume A kg Total Refrigerant volume of 10HP factory refrigerant volume super addition 2 Calculate the...

Page 61: ...R410A All DC Inverter Mini VRF MCAC VTSM 2016 02 58 Troubleshooting Part 4 Troubleshooting 1 PCB ports instructions 59 2 PCB parts instructions 60 3 Error code table 63 4 Troubleshooting 64...

Page 62: ...the inverter compressor In dynamic change 10 CN15 Reserve 11 SW6 For setting models 12 SW7 net address code automatically 13 SW8 Reserved 14 CN11 Internet group control of indoor units DC 2 5 2 7V 15...

Page 63: ...ooling fin 9 Opening degree of EXV Actual value Display value 8 10 Actual current value Actual value 11 DC gener atrix voltage Actual value 12 T2 T2B average temperature Actual value 13 Quantity of in...

Page 64: ...MCAC VTSM 2016 02 R410A All DC Inverter Mini VRF Troubleshooting 61 2 2 Function setting dial switches instruction...

Page 65: ...on indicator lamp of inverter module The lamp will be off if the system running is normal And it will be on if the inverter module is faulty and the error code will display on digital tube LED2 Runnin...

Page 66: ...less than 200V for 5S H0 Communication malfunction betweem IR341 main board H4 3 times of L0 or L1 protection in 60 minutes P1 High pressure protection P2 Low pressure protection P3 Input current prot...

Page 67: ...g 4 1 E9 EEPROM malfunction The malfunction may be caused by two reasons 1 The EEPROM is not inserted well 2 Outdoor main board is broken LED display E0 or E9 EEPROM malfunction Replace outdoor main b...

Page 68: ...unit chip Judge 3 check the communication wire sequence is correct or not Connect the wire again NO Judge 4 Check whether there is disconnection YES Replace NO Judge 2 check whether the three cored sh...

Page 69: ...eplace outdoor main board YES Check whether the connecting wiring between the IPM module positive pole and the CN12 on the power board is break off YES Insert the connecting wiring well over again NO...

Page 70: ...main PCB Judge T3 T4 sensor malfunction Connect the wire again YES NO Judge whether temperature sensor pin connects properly YES Connect again NO NO Replace T3 T4 sensor YES LED displays E5 Voltage pr...

Page 71: ...ct or not NO Connect again YES O Check whether PN voltage of the DC fan transfer board is from 255V to 367V YES DC fan motor power supply is normal Check the Voltage between DC fan motor s white termi...

Page 72: ...r ambient temperature is higher than the unit s operating condition under heating mode YES Belongs to system normal protection NO Check whether the refrigerant volume of the system is added according...

Page 73: ...h pressure switch YES Check whether the cooling system operates normally Replace the main PCB NO Judge 3 whether high pressure of the system is too high YES Stop the system NO Judge 4 whether side air...

Page 74: ...e unit NO Judge 4 whether refrigerant system leaks YES Leakage detecting add nitrogen or refrigerant into the system si si will sound evidently if leaks heavily Use soap water the combination of water...

Page 75: ...than 15A Check cooling system is normal or not YES Judge 2 Check whether the outdoor ambient temperature is too high YES Stop the unit NO NO Judge 3 check whether the outdoor unit ventilates well YES...

Page 76: ...he compressor Check whether the discharged temperature of the compressor is higher than 115 C NO Check whether the compressor discharged temperature sensor connects with PCB correctly according to the...

Page 77: ...rature is higher than 62 degrees for 3 seconds NO Check whether the resistance of condenser temperature sensor is correct YES Replace the outdoor PCB NO Replace the temperature sensor YES Judge 1 whet...

Page 78: ...ot NO Replace rectifier NO YES Check each reactor is connected normally If wiring is damaged the resistance of two ports is NO Replace connecting wire YES Check if wiring connection between main PCB a...

Page 79: ...go to next step 1 2 2 Check the rectification circuit Find out any loose in the circuit Moreover check the filter board rectifier stacks Mind DC and AC switch on the meter while doing this 1 2 3 If n...

Page 80: ...ow table clamp They should be 4A at the frequency of 35 Hertz 4 P6 appears after the compressor turns on with difficulties 4 1 Check the module according to step 3 first 4 2 If the module works make t...

Page 81: ...C contactor should be picked up If not there s something wrong with the main control board or the PTC resistors which need to be replace correspondingly b Somewhere is loose in the circuit c The volta...

Page 82: ...erature of evaporator is higher than 63 degrees for 50 seconds or not NO Check whether the resistance of evaporator temperature sensor is correct YES Replace outdoor main PCB NO Replace temperature se...

Page 83: ...displays P8 Typhoon protection YES Belongs to normal protection When air conditioner is standby or in malfunction stopping status check if there is strong air blows the fan phenomenon NO Check whether...

Page 84: ...Midea Group Address Midea Headquarters Building 6 Midea Avenue Beijiao Shunde Foshan Guangdong China Postal code 528311 Tel 86 757 26338346 Fax 86 757 22390205 cac midea com global midea com Note Prod...

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