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Service manual 

 

There is risk of electric shock. 

 

When the product is not be used for a long time, 

disconnect the power supply plug or turn off the 

breaker. 

There is risk of product damage or failure, or unintended 
operation. 

 

Take care to ensure that nobody could step on or fall 

onto the outdoor unit. 

This could result in personal injury and product damage. 
 
 

 

CAUTION 

 

Always check for gas (refrigerant) leakage after 

installation or repair of product. 

Low refrigerant levels may cause failure of product. 

 

Install the drain hose to ensure that water is drained 

away properly. 

A bad connection may cause water leakage. 

 

Keep level even when installing the product. 

To avoid vibration of water leakage. 

 

Do not install the product where the noise or hot air 

from the outdoor unit could damage the 

neighborhoods. 

It may cause a problem for your neighbors. 

 

Use two or more people to lift and transport the 

product. 

Avoid personal injury. 

 

Do not install the product where it will be exposed to 

sea wind (salt spray) directly. 

It may cause corrosion on the product. Corrosion, 
particularly on the condenser and evaporator fins, could 
cause product malfunction or inefficient operation. 
 

 

 

Operational 

 

Do not expose the skin directly to cool air for long 

periods of time. (Do not sit in the draft). 

This could harm to your health. 

 

Do not use the product for special purposes, such 

as preserving foods, works of art, etc. It is a 

consumer air conditioner, not a precision refrigerant 

system. 

There is risk of damage or loss of property. 

 

Do not block the inlet or outlet of air flow. 

It may cause product failure. 

 

Use a soft cloth to clean. Do not use harsh 

detergents, solvents, etc. 

There is risk of fire, electric shock, or damage to the 
plastic parts of the product. 

 

Do not touch the metal parts of the product when 

removing the air filter. They are very sharp. 

There is risk of personal injury. 

 

Do not step on pr put anything on the product. 

(outdoor units) 

There is risk of personal injury and failure of product. 

 

Always insert the filter securely. Clean the filter 

every two weeks or more often if necessary. 

A dirty filter reduces the efficiency of the air conditioner 
and could cause product malfunction or damage. 

 

Do not insert hands or other object through air inlet 

or outlet while the product is operated. 

There are sharp and moving parts that could cause 
personal injury. 

 

Do not drink the water drained from the product. 

It is not sanitary could cause serious health issues. 

 

Use a firm stool or ladder when cleaning or 

maintaining the product. 

Be careful and avoid personal injury. 

 

Replace the all batteries in the remote control with 

new ones of the same type. Do not mix old and mew 

batteries or different types of batteries. 

There is risk of fire or explosion. 

 

Do not recharge or disassemble the batteries. Do not 

dispose of batteries in a fire. 

They may burn of explode. 

 

If the liquid from the batteries gets onto your skin or 

clothes, wash it well with clean water. Do not use the 

remote of the batteries have leaked. 

The chemical in batteries could cause burns or other 
health hazards. 

Summary of Contents for MSV1-09HRDN1

Page 1: ...Cover MSV1 09HRDN1 MSV1 12HRDN1...

Page 2: ...ngth and the elevation 14 8 4 Air purging of the piping and indoor unit 15 8 5 Pumping down Re installation 16 8 6 Re air purging Re installation 17 8 7 Balance refrigerant of the 2 way 3 way valves 1...

Page 3: ...it Error Display 31 13 2 Diagnostic chart 36 13 3 Resetting phenomenon often occurs during operation 38 13 4 Operation lamp flashes and Timer lamp off 38 13 5 Operation lamp flashes and Timer lamp on...

Page 4: ......

Page 5: ...very high and a door or a windows is left open Moisture may condense and wet or damage furniture Take care to ensure that power cable could not be pulled out or damaged during operation There is risk...

Page 6: ...a precision refrigerant system There is risk of damage or loss of property Do not block the inlet or outlet of air flow It may cause product failure Use a soft cloth to clean Do not use harsh deterge...

Page 7: ...n is turn to low speed cooling heating The unit will be turn off at the seventh hour Sleep mode auto control The function is usually used in rainy days in springtime or damp areas Independent dehumidi...

Page 8: ...ly The hydrophilic fin can improve the heating efficiency at operation mode Hydrophilic aluminum fin It is only operated in the heating operation mode except defrosting operation Anti rust cabinet Val...

Page 9: ...Service manual 3 Dimension 3 1 Indoor unit Vertu Dimension W H D 5 Mode 9K 795 270 165 12K 845 286 165 3 2 Outdoor unit Vertu Dimension W H D Mode 9K 760 590 285 12K 760 590 285...

Page 10: ...min 1150 1000 850 1250 1050 900 m3 h 570 480 350 700 520 420 dB A 40 34 29 42 35 29 Model YDK24 6F YDK24 6F Brand Welling Welling Input W 56 56 Capacitor uF 2 5 2 5 Speed r min 800 800 m3 h 1700 1900...

Page 11: ...Service manual 5 Refrigerant cycle diagram 7...

Page 12: ...rom the continuous operation under constant air temperature conditions However excludes the initial pull down stage 6 2 Heating operation Indoor air temp DB Outdoor unit air temp DB Note The chart is...

Page 13: ...Service manual 7 Schematic diagram and Wiring diagram 7 1 Schematic diagram 7 1 1 Display board 9...

Page 14: ...Service manual 7 1 2 Indoor main PCB 10...

Page 15: ...Service manual 7 1 3 Outdoor main PCB 11...

Page 16: ...Service manual 7 1 4 Outdoor power PCB 12...

Page 17: ...Service manual 7 2 Wiring diagram 7 2 1 MSV1 09HRDN1 MSV1 12HRDN1 13...

Page 18: ...Unit 7K 9K 12K mm2 1 0 1 0 1 5 8 3 Pipe length and the elevation 14 Pipe size Capacity Btu h GAS LIQUID Standard length Max Max Additional Elevation Elevation refrigerant m B m B m g m 3 8 9 52 1 4 6...

Page 19: ...nd 3 way valves 8 Check for gas leakage At this time especially check for gas leakage from the 2 way and 3 way stem nuts and from the service port Be sure to use a hexagonal wrench to operate the valv...

Page 20: ...rge hose with the push pin to the gas service port 4 Air purging of the charge hose Open the low pressure valve on the charge set slightly to purge air from the charge hose 5 Set the 2 way valve to th...

Page 21: ...minutes repeat 3 times After purging the air use a torque wrench to tighten the flare nut to on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refr...

Page 22: ...service port 3 Open the valves Low side on the charge set and discharge the refrigerant until the gauge indicates 0 05 to 0 1 Mpa If there is no air in the refrigeration cycle the pressure when the ai...

Page 23: ...s moved toward 0 1 Mpa 76 cmHg vacuum of 4 mmHg or less 3 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes af...

Page 24: ...pecified amount of refrigerant if can be charged with a little at a time approximately 150g each time0 while operating the air conditioner in the cooling cycle however one time is not sufficient wait...

Page 25: ...C Pressure kg cm2 34 0 33 5 32 0 31 0 28 0 27 0 18 C Pressure kg cm2 35 0 34 5 34 0 32 5 29 0 27 5 20 C Pressure kg cm2 36 5 36 0 35 5 33 5 30 0 28 5 22 C Pressure kg cm2 37 0 36 5 36 0 35 0 31 5 29...

Page 26: ...56 1 51 1 39 1 37 1 30 Capacity kW 3 45 4 10 4 05 3 70 3 48 3 11 2 99 1 70 18 C Input kW 0 96 1 55 1 58 1 60 1 52 1 40 1 38 1 32 Capacity kW 3 44 4 05 2 87 3 69 3 47 3 00 2 86 1 69 20 C Input kW 0 96...

Page 27: ...9 2 01 1 99 1 80 1 76 Capacity kW 4 801 6 09 5 58 5 02 4 39 4 10 3 59 3 27 18 C Input kW 1 6 2 18 2 39 2 20 2 16 2 09 1 83 1 81 Capacity kW 4 684 5 89 4 03 4 90 4 21 3 89 3 37 3 11 20 C Input kW 1 658...

Page 28: ...osting automatically or when the warm air control feature is activated in heating mode 11 1 6 TURBO indication lamp Lights up when select TURBO function on cooling operation or on heating operation 11...

Page 29: ...o signals in 4 minutes the unit stops and LED displays failure information and can t return to normal operation automatically 11 3 Fan only mode Fan speed is high mid low Auto 11 4 Cooling mode 11 4 1...

Page 30: ...ing mode or turned off 4 way valve doesn t delay in dehumidifying mode 11 6 2 Generally the outdoor fan is turned off with the on off action of compressor in heating mode except for the defrosting mod...

Page 31: ...ger remains consecutively lower than 3 c for more than 80 minutes and the temperature remains consecutively 2 c for more than 3 minutes 11 7 1 2 When outdoor temp is less than 0 Defrosting starts when...

Page 32: ...l switch 11 10 1 Mode changes when push this button Cooing mode Auto mode Unit off Cooing mode 11 10 2 At Cooing mode after 30 minutes cooling operation whose fan speed is set as low the A C operates...

Page 33: ...ates in accordance with selected running mode by auto mode 11 12 5 After 7 hours unit cancels this modes automatically 11 13 Auto restart function In case of a sudden power failure this function autom...

Page 34: ...8 38 F3 45 48 45 48 F4 52 57 52 57 F5 57 66 57 66 F6 64 76 64 76 F7 74 84 74 84 F8 86 90 86 90 F9 92 94 92 94 F10 96 98 96 98 I1COOL 6 0 6 5 6 0 6 5 I2COOL 7 0 8 3 7 0 8 3 I3COOL 8 5 9 5 8 5 9 5 I1HEA...

Page 35: ...ure sensor open or short circuit of P0 Module protection P1 Over voltage or too low voltage protection P2 Compressor top protection against temperature P3 Outdoor low temp protection P4 Inverter compr...

Page 36: ...s defective Yes Yes Does the led on outdoor control board bright No YES Replace the module board The power supply of PCB is supplied by the module board Replace the outdoor power supply board Yes Is t...

Page 37: ...r connection good Is voltage being applied to the fan motor rang 90v 160v between mid pin and N on CN1 No Indoor fan motor is defective Repair the connector No Yes Indoor PCB is defective Is connectio...

Page 38: ...the wires to compressor right Check the inverter module If some component cracked or damaged Is it breakdown between P N P U P V N W N U N V At inverter module Check compressor Inverter module is defe...

Page 39: ...circulation volume normal Gas charging Is abnormality the same after gas charging Check refrigerant system such as clogging of ill t Is protector normal Check the outdoor main PCB Replace protector N...

Page 40: ...lighted and the air conditioner can t be operated Reconnecting Yes Replace outdoor main PCB If the problem can not be solved replace inverter module Replace inverter compressor No If the problem comes...

Page 41: ...eck if AC 220V exists at the primary coil of transformer Yes YES No Check if AC 14 5V exists at the secondary coil of transformer Indoor PCB is defective Take off the secondary plug of transformer and...

Page 42: ...er changing indoor PCB check if the failure realease Yes After changing indoor fan motor check if the failure realease Yes YES Yes Power supply circuit has problems Indoor PCB is defective 13 4 Operat...

Page 43: ...changing the main control board check if the failure realease Power supply fault No Outdoor unit fault such as the compressor 13 7 Operation lamp on and Timer lamp flashes EEROM error indoor PCB is de...

Page 44: ...10 52 3 1918 1 37 1988 26 9 5507 53 3 0707 0 35 2024 27 9 1245 54 2 959 1 33 3269 28 8 7198 55 2 8442 2 31 5635 29 8 3357 56 2 7382 3 29 9058 30 7 9708 57 2 6368 4 28 3459 31 7 6241 58 2 5397 5 26 877...

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