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Midea MDV-V105W/DVN1, Owner'S Manual

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Midea MDV-V105W/DVN1 Owner'S Manual Download Page 93

MCAC-VTSM-2014-09 

 

R410A All DC Inverter Mini VRF   

Troubleshooting                                                                                                                                                                                            91 

7.14.2 L1/L4 troubleshooting 

Step  1:  Check  the  DC  voltage  between  P  and  N  terminal,  the  normal  value  should  be  510V~580V,  if  the 

voltage is lower than 510V, go to step 2. 

 

 

Step 2: Check whether the wires of rectifier circuit are loose or not. If wires are loosen, fasten the wires. If 

wires are OK, replace the PCB.   

 

 

 

 

 

 

 

 

 

 

 

 

 

7.14.3 L2 troubleshooting 

Step  1:  Check  the  DC  voltage  between  P  and  N  terminal,  the  normal  value  should  be  510V~580V,  if  the 

voltage is higher than 580V, go to step   

 

 

2 Step 2: Check the voltage between the capacitor, the normal value should be 510V±30V or 310V±30V, if 

not in the range then the PCB has malfunction, it needs to be replaced. 

 

 

 

Turn the measure 

range of the meter to 

1kV and measure the 

voltage between two 

electrolytic capacitors 

Filter 

board 

1-Phase 

rectifier stack 

Summary of Contents for MDV-V105W/DVN1

Page 1: ...ormation 1 Part 2 Outdoor Units 9 Part 3 Installation 49 Part 4 Troubleshooting 61 Manufacture reserves the right to discontinue or change at any time specifications or designs without notices and wit...

Page 2: ......

Page 3: ...MCAC VTSM 2014 09 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 8...

Page 4: ...mm Net Gross weight lbs kg Power supply MDV V105W DVN1 Width 42 21 64 1075 Height 38 1 32 966 Depth 15 19 32 396 171 8 187 4 78 85 208 230V 1ph 60Hz MDV V120W DVN1 Width 35 7 14 900 Height 52 1 4 1327...

Page 5: ...Nomenclature MDV V120W DVN1 Note the actual cooling capacity please refers to the nameplate Refrigerant N1 R410A Power supply V 208 230V 60Hz 1ph D 208 230V 60Hz 3ph C 380 415V 60Hz 3ph Inverter Type...

Page 6: ...quiring heating and cooling of up to 7 zones with one outdoor unit Such as villa restaurant school etc Midea offers a variety of indoor unit more than 100 models of 15 types Capacity ranges are from 1...

Page 7: ...Optimally design fan shape and new designed discharge air grille and air deflector making higher air volume and lower operation sound 3 5 Quick warm up cool down design and less temperature fluctuati...

Page 8: ...or unit installation 3 9 Simple signal line connection Installation is much easier as the communication wiring between indoor outdoor units can be shared It s easy for the user to retrofit the existin...

Page 9: ...tton makes outdoor unit run in cooling mode at any condition so it is very easy for you to charge refrigerant to the system when it needs to be done The self diagnosis function detects malfunctions in...

Page 10: ...igh static pressure duct 18 6140 22 7500 28 9600 36 12300 45 15400 56 19100 71 24200 80 27300 90 30700 100 34100 112 38200 140 42600 160 54600 Capacity 100W Capacity Btu h Wall mounted Ceiling Floor S...

Page 11: ...i VRF Specifications Performance 9 Part 2 Outdoor Units 1 Specifications 10 2 Dimensions 13 3 Service Space 14 4 Piping Diagrams 15 5 Wiring Diagrams 16 6 Capacity Tables 19 7 Electric Characteristics...

Page 12: ...0 177 200 670 FV50S 0 230 0 166 870 630 Outdoor fan motor Model WZDK170 38G 1 WZDK100 38G Type DC motor DC motor Brand Panasonic Panasonic Insulation class E E Safe class IP23 IP23 Input W 200 2 x 100...

Page 13: ...8 26 8 Connection wiring Power wiring mm2 3 core x 4 0 3 core x 4 0 Signal wiring mm2 3 core shielded wire x 0 75 3 core shielded wire x 0 75 Ambient temperature Cooling 5 109 4 15 43 Heating 5 80 6 1...

Page 14: ...s kg 209 4 233 7 95 106 224 9 249 1 102 113 Refrigerant Type R410A R410A Charged volume Lbs kg 8 6 3 9 8 6 3 9 Throttle type Electronic expansion valve Design pressure MPa 4 4 2 6 Refrigerant piping L...

Page 15: ...09 R410A All DC Inverter Mini VRF Specifications Performance 13 2 Dimensions 10 5kW 12kW 14kW 16kW Unit in mm 38 1 32 966 38 31 32 990 42 21 64 1075 24 9 16 624 13 15 16 354 13 15 64 336 15 19 32 396...

Page 16: ...300 23 5 8 600 11 13 16 300 78 3 4 2000 Wall or obstacle Maintain channel Air outlet Air inlet Air inlet Single unit installation 78 3 4 2000 11 13 16 300 Parallel connect the two units or above Paral...

Page 17: ...eceiver 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 expansion valve The o...

Page 18: ...R410A All DC Inverter Mini VRF MCAC VTSM 2014 09 16 Specifications Performance 5 Wiring Diagrams For 10 5kW...

Page 19: ...MCAC VTSM 2014 09 R410A All DC Inverter Mini VRF Specifications Performance 17 For 12 14 16kW...

Page 20: ...R410A All DC Inverter Mini VRF MCAC VTSM 2014 09 18 Specifications Performance 6 Field Wiring...

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Page 49: ...0 85 6 26 0 98 7 25 1 13 7 75 1 21 8 25 1 28 9 24 1 44 10 3 1 61 64 4 5 23 0 86 6 26 1 7 25 1 15 7 75 1 22 8 25 1 3 9 24 1 47 10 3 1 64 68 5 23 0 87 6 26 1 01 7 25 1 16 7 75 1 24 8 25 1 33 9 24 1 49...

Page 50: ...6 4 96 13 6 5 06 13 55 5 23 19 4 18 32 14 19 4 65 14 19 4 81 14 14 4 98 14 14 5 07 14 09 5 15 14 09 5 32 23 21 92 14 95 4 79 14 9 4 96 14 84 5 12 14 84 5 2 14 84 5 28 14 79 5 43 26 6 25 34 15 65 4 94...

Page 51: ...5 69 13 31 5 74 19 4 18 32 14 01 5 38 14 01 5 51 13 95 5 64 13 95 5 7 13 95 5 76 13 31 5 48 23 21 92 14 76 5 5 14 71 5 62 14 71 5 74 14 65 5 8 14 28 5 62 13 31 5 15 26 6 25 34 15 46 5 61 15 46 5 72 15...

Page 52: ...4 29 10 2 3 98 9 88 3 84 9 55 3 69 8 9 3 41 23 21 92 11 5 4 32 10 85 4 04 10 2 3 76 9 88 3 62 9 55 3 49 8 9 3 23 26 6 25 34 11 5 4 08 10 85 3 82 10 2 3 56 9 88 3 43 9 55 3 3 8 9 3 05 32 30 74 11 5 3 7...

Page 53: ...N1 60 208 230V 187V 253V 30 30A 13 5 0 2 1 8 MDV V140W DVN1 60 208 230V 187V 253V 30 30A 13 5 0 2 1 8 MDV V160W DVN1 60 208 230V 187V 253V 30 40A 16 1 2 0 085 2 0 9 Remark TOCA Total Over current Amps...

Page 54: ...ient temperature is lower than 15 o C 5 o F or higher than 43 o C 109 4 o F the unit will stop for protection control 10 5 0 5 10 15 20 25 30 35 40 45 10 15 20 25 30 35 20 15 10 5 0 5 10 15 20 25 30 3...

Page 55: ...RF 53 Installation Part 3 Installation 1 Precautions 54 2 Accessories 55 3 Outdoor unit installation 55 4 Piping installation 57 5 Electric Wiring Installations 61 6 Outdoor Unit Wiring 63 7 Test Runn...

Page 56: ...than the specified refrigerant into the refrigeration cycle If air or any other has is mixed in refrigerant the gas pressure in the refrigeration cycle becomes abnormally high and it may resultantly c...

Page 57: ...to a strong wind such as the upper stairs or rooftop of a building apply the windproof measures referring to the following examples Install the unit so that its discharge port faces to the wall of the...

Page 58: ...two units or above Parallel connect the front with rear sides All the pictures in this manual are for explanation purpose only They may be slightly different from the air conditioner you purchased de...

Page 59: ...ld from inside to outside and then piping and wiring through this Pay attention to the piping the fat connecting pipe should out from the largest hole otherwise the pipes will be rubbed Please do the...

Page 60: ...the nearest branch Maximum pipe equivalent length Pipe Length from the first branch to the furthest IDU Level difference bwtween IDU IDU Level difference between ODU ODU Indoor unit a N1 3 N 5 N 6 N...

Page 61: ...m Flaring nut 1 4in 6 35mm Flaring nut Duct type 5 6 14 5 8in 15 9mm Flaring nut 3 8in 9 53mm Flaring nut Ceiling Floor 3 6 4 5 1 2in 12 7mm Flaring nut 1 4in 6 35mm Flaring nut Ceiling Floor 5 6 16 5...

Page 62: ...s Wash the piping with high pressure nitrogen never use refrigerant of outdoor unit 4 5 Airtight Test Charge pressured nitrogen after connecting indoor outdoor unit piping to do airtight test Cautions...

Page 63: ...t be the same circuit and must simultaneously on or off otherwise system life will seriously effect and appear the situation not to solve 4 The communication line between indoor units and outdoor unit...

Page 64: ...engineering is prohibited to bind together with refrigerant piping It is necessary to pass through wire tube and be distributed separately and the gap between control line and power wire should be 50...

Page 65: ...xed wiring according to the National Wiring Regulation Caution Employ an electrical engineer for wiring Complete wiring according to national electrical standards To reduce interference use a three co...

Page 66: ...al action can be taken on time Refrigerant critical thickness 0 44 kg m3 for R410A Confirm the critical thickness through follow steps and take necessary actions 1 Calculate the sum of the charge volu...

Page 67: ...VRF Troubleshooting 65 Part 4 Troubleshooting 1 PCB ports instructions 66 2 PCB parts instructions 68 3 Function setting dials witches instructions 70 4 LED on PCB instructions 71 5 PCB Introduction 7...

Page 68: ...of outdoor fan port DC380V 15V 14 CN30 Communication port between indoor units DC2 5 5V 15 CN29 Communication port between outdoor unit and indoor unit DC2 5 5V 16 CN13 Signal input port of system low...

Page 69: ...ort between indoor units DC 5V 15 CN10 Communication port between indoor unit and outdoor unit DC 5V 16 Signal input port of AC input current 17 CN1 Detect port of radiation fin DC 5V 18 CN6 Signal in...

Page 70: ...ing temperature Actual value 7 T4 environment temperature Actual value 8 T5 discharge temperature Actual value if it is more than one hundred it will be only display the hundreds digit and the tens di...

Page 71: ...ling 3 Heating 4 Forced cooling 3 Operating fan speed level 0 Power off 4 The total required capacity of the indoor unit 5 The required capacity of the revised outdoor unit 6 T3 piping temperature Act...

Page 72: ...e If there is no fault or protection code it will be display nn 17 Display 3 Function setting dial switches instructions 10 5 kW SW3 definition Auto Addressing Dial SW3 1 ON Obtain network address aut...

Page 73: ...to the following picture LED1 Malfunction 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 w...

Page 74: ...ll DC Inverter Mini VRF MCAC VTSM 2014 09 72 Troubleshooting 5 PCB Introduction 10 5 kW 12 16kW IPM Module Drive Board Main PCB Filter Board PFC Module PFC Module IPM Module Drive Board Main PCB Filte...

Page 75: ...10 5 kW E8 12 16 kW P1 High pressure protection All models P2 Low pressure protection All models P3 Compressor current protection All models P4 Compressor discharge temperature protection All models...

Page 76: ...IR341chip is on the IPM module LED display H0 E3 Communication malfunction between main PCB chip and IR341 chip Whether the LED indicator on the drive board flash normally Replace the drive board NO W...

Page 77: ...ress 0 1 2 3 4 5 6 7 8 9 Capacity 100W 22 28 36 45 56 71 80 90 112 140 HP 0 8 1 0 1 2 1 6 2 0 2 5 3 0 3 2 4 0 5 0 For example LED displays E2 Communication malfunctions between indoor unit chip and ou...

Page 78: ...n P and Q of outdoor unit Installation refers to the following picture Note Communication wires should be shield wire and indoor units should be connected in series 7 3 E4 Pipe temperature T3 ambient...

Page 79: ...bolt as follows 7 4 E5 Voltage protection malfunction for all models T4 sensor is worn out and connected with sheet metal After being reconnected the system becomes normal LED displays E5 Voltage prot...

Page 80: ...diagram to check whether the DC fan wiring is correct or not NO Connect again YES O Check whether power source and voltage of DC fan are normal Check whether the voltage with black red terminal conne...

Page 81: ...her than normal value compressor makes noise pressure meter do not display steady LED displays E7 Discharge sensor malfunction Check whether discharge temperature sensor s head is inside the sleeve or...

Page 82: ...function E9 is for 10 5kW E0 is for 12 16kW The malfunction may be caused by two reasons 1 The EEPROM is not inserted well 2 Outdoor main board is broken LED display E9 E0 EEPROM malfunction Replace o...

Page 83: ...ent temperature is higher than the unit s operating condition when heating mode YES Belongs to system normal protection NO Check whether the refrigerant volume of the system is added according to the...

Page 84: ...the high pressure switch YES Check whether the cooling system operates normally Replace the main PCB NO Whether high pressure of the system is too high YES Stop the system NO Whether side air duct of...

Page 85: ...system can work as normal YES NO Check whether the outdoor ambient temperature is too low YES Stop the unit NO Whether refrigerant system leaks YES Leakage detecting add nitrogen or refrigerant into t...

Page 86: ...ower wire is more than 30A Check cooling system is normal or not YES Check whether the outdoor ambient temperature is too high YES Stop the unit NO NO Check whether the outdoor unit ventilates well YE...

Page 87: ...perature of the 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 acc...

Page 88: ...er condenser temperature is higher than 62 degrees for 3 seconds NO Check whether the resistance of condenser temperature sensor is correct YES Replace the outdoor main PCB NO Replace the temperature...

Page 89: ...bridge is normal or not 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 connecti...

Page 90: ...frequency difference in one second more than 15Hz L9 frequency difference between the real and the setting frequency more than 15Hz L0 module protection L5 Zero speed protection L7 Phase sequence err...

Page 91: ...ne of the above works replace the PCB Module check 1 DC voltage between P and N should be 296V to 324V 2 DC voltage between 1 and 2 should be 510V to 580V 3 First adjust multi meter to diode position...

Page 92: ...control box A is malfunction then check the inverter module If the compressor could not start normally that means the compressor is malfunction the go to step 3 to check the compressor Step 3 Check t...

Page 93: ...fasten the wires If wires are OK replace the PCB 7 14 3 L2 troubleshooting Step 1 Check the DC voltage between P and N terminal the normal value should be 510V 580V if the voltage is higher than 580V...

Page 94: ...ection Check whether average temperature 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 m...

Page 95: ...LED 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 wh...

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