Midea MSV1-07CRN1 Service Manual Download Page 33 | Manualshive

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Midea MSV1-07CRN1 Service Manual Download Page 33

Service manual

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9 Troubleshooting

9.1 LCD Display board

ON/OFF indicator

This indicator illuminates when the air conditioner is in operation.

PRE.-DEF. Indicator (For Cooling & Heating models only)

This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control

feature is activated in heating mode.

Turbo indicator

This indicator illuminates when the air conditioner is in turbo operation.

TEMPERATURE indicator

Usually it displays the temperature settings.

TIMER indicator

This indicator illuminates when TIMER is set ON/OFF.

FAN SPEED indicator

This indicator illuminates when change the fan speed.

AUTOCEPHALY AIR EXCHANGING indicator

This indicator illuminates when the indoor air exchange with the outdoor air.

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Summary of Contents for MSV1-07CRN1

Page 1: ...MSV1 07CRN1 MSV1 07HRN1 MSV1 09CRN1 MSV1 09HRN1 MSV1 12CRN1 MSV1 12HRN1...

Page 2: ......

Page 3: ...20 7 2 Proper symbols and their meaning 20 7 3 Function 21 7 4 Protection 21 7 5 Fan only mode 22 7 6 Cooling mode 22 7 7 Dehumidifying mode 23 7 8 Heating mode 23 7 9 Defrosting mode available for he...

Page 4: ......

Page 5: ...ker of fuse There is risk of fire or electric shock Do not modify or extend the power cable There is risk of fire or electric shock Do not install remove or reinstall the unit by yourself customer The...

Page 6: ...tric shock Do not open the inlet grill of the product during operation Do not touch the electrostatic filter if the unit is so equipped There is risk of physical injury electric shock or product failu...

Page 7: ...f 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...

Page 8: ...The function will be operate in any operation mode 12 Air flow Direction control The louver can be set at the desired position or swing up and down automatically 13 Auto mode The unit can be change b...

Page 9: ...anual 5 2 Dimension Indoor unit Dimension Mode W H D 7K 795 270 165 9K 795 270 165 12K 845 286 165 outdoor unit Dimension Mode W H D L1 L2 7K 700 535 285 458 250 9K 780 540 250 549 266 12K 780 540 250...

Page 10: ...1 2 1 2 1 2 1 2 Speed hi mi lo r min 1040 900 800 1040 900 800 1040 900 800 1040 900 800 m3 h 450 450 550 550 dB A 36 33 30 36 33 30 38 35 32 38 35 32 Model YDK24 6T YDK24 6T YDK24 6F YDK24 6F Brand W...

Page 11: ...900 1260 1080 900 m3 h 650 650 dB A 40 37 34 40 37 34 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 1800 1800 dB A 55 55 g R410A 1050 R410A...

Page 12: ...Service manual 8 Refrigerant cycle diagram Cooling only Heat pump mode...

Page 13: ...from the continuous operation under constant air temperature conditions However excludes the initial pull down stage Heating operation Indoor air temp DB Outdoor unit air temp DB Note The chart is th...

Page 14: ...SV1 09CRN1 MSV1 12CRN1 Indoor unit outdoor unit RED R ED BLUE M COMPRESSON C R S BLUE 1 2 N M BLACK BLACK COMPRESSON CAPACITON FAN CA P A C I TON FAN BLACK RED YELL O W G R EEN YE L LOW GREEN OVERLOAD...

Page 15: ...Indoor unit outdoor unit 1 2 N 3 4 Y G BL UE S R M RE D C BL AC K COMPRESSOR O V E RLO AD RE L A Y BL A CK BL UE BL UE 4 WAY Y G RE D CO MP RES SO R C AP ACI TO R F AN MO TO R BL UE RED FAN C APACI TO...

Page 16: ...cording to the following specifications sheet Amp 10 15 20 mm 2 1 0 1 5 2 5 Grade 6 3 Pipe length and the elevation Standard length Max Max Additional m Elevation Elevation refrigerant Btu h GAS LIQUI...

Page 17: ...torque wrenches wrench to hold the joints and gas leak detector Note The air in the indoor unit and in the piping must be purged If air remains in the refrigeration piping it will affect the compresso...

Page 18: ...wait for one minute 7 Use torque wrench to tighten the service port cap to a torque of 1 8 kg m 18n m 8 Set the 3 way valve to the opened position 9 Mounted the valve stem nuts to the 2 way and 3 way...

Page 19: ...charge 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...

Page 20: ...inutes repeat 3 times 6 After purging the air use a torque wrench to tighten the flare nut to on the 2 way valve 7 Check the gas leakage 8 Check the flare connections for gas leakage 9 Discharge the r...

Page 21: ...he 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...

Page 22: ...has 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...

Page 23: ...e specified 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 wa...

Page 24: ...minutes until turns off the compressor IFAN Self protection amp of outdoor fan indoor fans when they change from higher wind to lower wind IRESTORE Amp self protection return value THDEFROST High win...

Page 25: ...uit and breaking disconnection 7 4 3 Fan Speed is out of control When Indoor Fan Speed is too high higher than High Fan 300RPM or too low lower than 400RPM the unit stops and LED displays failure info...

Page 26: ...ion of the compressor and the outdoor fan T indoor temperature Auto fan at cooling mode Anti freezing control to indoor evaporator at cooling mode T evaporator temp TE5 T EVAP temp up EVAP temp down T...

Page 27: ...erally the outdoor fan is turned off with the on off action of compressor in heating mode except for the defrosting mode or the end of defrost 7 8 3 Action of compressor and outdoor fan motor at heati...

Page 28: ...sting mode available for heating mode 7 9 1 Defrosting condition Defrost starts when either of the following T3 lower than 0 C lasts for more than 40 minutes provided that the time period then the tem...

Page 29: ...r fan blows automatically in corresponding selected mode 7 10 3 The motion of indoor fan s blade should accord with the selected operation mode 7 10 4 One mode should be carried out for at least 15 mi...

Page 30: ...to mode 7 12 2 Cooling The set temperature rise 1 per hour Two hours later the set temperature will maintain as a constant and the fan speed is kept at low speed 7 12 3 Heating The set temperature dec...

Page 31: ...14 Ionizer air clean function 7 14 1 Ionizer air clean function is effected when the unit is working and controlled by the remote controller 7 14 2 This function is active when the unit received the...

Page 32: ...E7 60 60 63 TE8 53 53 53 TE9 50 50 52 THDEFROST 15 17 18 TMDEFROST 16 18 19 TLDEFROST 17 19 20 ANGLRANGE 196 196 196 ANGLOFF 100 100 100 ANGLCOOL 180 180 180 ANGLHEAT 22 22 22 ANGLCSL 8 8 8 ANGLCSH 40...

Page 33: ...or when the warm air control feature is activated in heating mode Turbo indicator This indicator illuminates when the air conditioner is in turbo operation TEMPERATURE indicator Usually it displays th...

Page 34: ...error E3 Fan speed beyond control E4 Over current protection of the compressor occurs 4 times E5 Open or short circuit of Room temperature sensor E6 evaporator temperature sensor open or short circuit...

Page 35: ...ccurs during operation That is automatically entering to the status when power is on The reason is that the instantaneous voltage of main chip is less than 4 5V Check according to the following proced...

Page 36: ...and Timer lamp flashes 9 8 Operation lamp on and Timer lamp flashes EEROM error indoor PCB is defective 9 9 Operation lamp flashes Timer lamp flashes This is alarm signal when the main chip can t det...

Page 37: ...5 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 8...

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