Midea MSG-30CRN1-QB9P Service Manual Download Page 27 | Manualshive

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Service manual

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Current protection
High temperature protection of indoor heat exchanger at heating mode
Auto defrosting and heating recovery at heating mode
Anti cold air at heating mode

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Summary of Contents for MSG-30CRN1-QB9P

Page 1: ...MSG 30CRN1 QB9P MSG 30HRN1 QB9P MSG 36CRN1 QB8P MSG 36HRN1 QB8P...

Page 2: ......

Page 3: ...length and the elevation 13 8 4 Air purging of the piping and indoor unit 13 8 5 Pumping down Re installation 15 8 6 Re air purging Re installation 16 8 7 Balance refrigerant of the 2 way 3 way valve...

Page 4: ...ubleshooting 31 12 3 Diagnostic chart 32 12 4 Resetting phenomenon often occurs during operation 33 12 5 Operation lamp flashes and Timer lamp off 33 12 6 Operation lamp flashes and Timer lamp on 33 1...

Page 5: ...Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury Do not let the air...

Page 6: ...tional 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...

Page 7: ...r each operation mode The unit will decide the louver direction according to operation mode Two direction air vane The fan is turn to low speed cooling heating The unit will be turn off after seven ho...

Page 8: ...unit run more quietly Low noise air flow system The hydrophilic fin can improve the heating efficiency at operation mode Hydrophilic aluminum fin It is only operated in the heating operation mode exce...

Page 9: ...ervice manual 5 3 Dimension 3 1 Indoor unit Dimension Mode W H L 28K 1250 325 230 36K 1250 325 230 3 2 Outdoor unit Dimension Mode W H D L1 L2 L3 28K 895 860 330 560 360 735 36K 895 860 330 560 360 73...

Page 10: ...00 m3 h 1350 1200 1050 1350 1200 1050 dB A 52 49 45 52 49 45 Model YDK100 6 YDK100 6 Brand Welling Welling Input W 169 169 Capacitor uF 5 5 Speed r min 900 900 m 3 h 1900 1900 dB A 60 60 g R410A 2450...

Page 11: ...0 1200 1050 1350 1200 1050 dB A 52 49 45 52 49 45 Model YDK100 6 YDK100 6 Brand Welling Welling Input W 169 169 Capacitor uF 5 5 Speed r min 900 900 m 3 h 3000 3000 dB A 60 60 g 2450 2450 MPa 4 2 4 2...

Page 12: ...Service manual 8 5 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 6 2 Heating operation Indoor air temp DB Outdoor unit air temp DB Note The chart i...

Page 14: ...Service manual 10 7 Schematic diagram and Wiring diagram 7 1 Schematic diagram...

Page 15: ...Service manual 11 7 2 Wiring diagram 7 2 1 Cooling and heating pump mode indoor unit MSG 30C H RN1 QB9P MSG 36C H RN1 QB8P 7 2 2 Cooling mode outdoor unit MSG 28CRN1 QB9P MSG 36CRN1 QB8P...

Page 16: ...tion details 8 1 Wrench torque sheet for installation Torque mm inch Kg m 9 52 3 8 4 2 16 0 5 8 6 6 Outside diameter 8 2 Connecting the cables The power cord of connect should be selected according to...

Page 17: ...r 5 7 meters 8 4 Air purging of the piping and indoor unit Required tools Hexagonal wrench adjustable wrench torque wrenches wrench to hold the joints and gas leak detector Note The air in the indoor...

Page 18: ...wait for one minute 5 Use torque wrench to tighten the service port cap to a torque of 1 8 kg m 18n m 6 Set the 3 way valve to the opened position 7 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: ...1 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 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: ...88 7 40 6 86 6 31 5 90 5 47 15 C W Sensitive capacity kW 5 75 5 52 5 18 4 79 4 50 4 21 Input kW 2 74 2 89 3 01 3 25 3 61 3 73 24 C D Total capacity kW 8 53 8 15 7 62 7 20 6 71 6 19 17 C W Sensitive ca...

Page 25: ...7 90 7 38 6 85 15 C W Sensitive capacity kW 7 21 6 92 6 48 6 00 5 64 5 28 Input kW 3 52 3 72 3 87 4 18 4 65 4 80 24 C D Total capacity kW 10 69 10 21 9 54 9 02 8 41 7 75 17 C W Sensitive capacity kW 7...

Page 26: ...ature TE2 Anti cold wind from Breeze to Setting Fan Speed temperature TE3 Anti cold wind from Setting Fan Speed to Breeze temperature TE4 Anti cold wind from Breeze to Fan Off temperature TE5 Evaporat...

Page 27: ...Service manual 23 Current protection High temperature protection of indoor heat exchanger at heating mode Auto defrosting and heating recovery at heating mode Anti cold air at heating mode...

Page 28: ...normal operation automatically 10 4 4 Cross Zero signal error warning If there is no Cross Zero signals in 4 minutes the unit stops and LED displays failure information and can t returns to normal ope...

Page 29: ...compressor if the compressor changed into non heating mode or turned off 4 way valve doesn t delay in dehumidifying mode 10 8 2 Generally the outdoor fan is turned off with the on off action of compre...

Page 30: ...7 The louver opens to Standard Angle ANGLHEAT when power is on for the first time 10 9 Defrosting mode available for heating mode 10 9 1 Defrosting condition Defrost starts when either of the followin...

Page 31: ...indoor fan blows automatically in corresponding selected mode 10 10 3 The motion of indoor fan s blade should accord with the selected operation mode 10 10 4 One mode should be carried out for at lea...

Page 32: ...will maintain as a constant and the fan speed is kept at low speed 10 12 3 Heating The set temperature decrease 1 per hour Two hours later the set temperature will maintain as a constant and the air...

Page 33: ...ower returns 11 Model and Parameters 1PH 198V 253V 50Hz Model MSG 28CRN1 QB9PMSG 28HRN1 QB9PMSG 36CRN1 QB8P MSG 36HRN1 QB8P I3SEC A 26 26 34 34 I5MIN A 24 24 32 32 IFAN A 20 20 25 25 IDEFROST A 18 18...

Page 34: ...icator illuminates then TIMER is set ON PRE DEF indicator For cooling heating mode only The air conditioner starts defrosting automatically if outdoor unit frosts in heating operating At this time PRE...

Page 35: ...or occurs 4 times X EEROM error On No over zero signal r Extinguish Flash at 5Hz For heat pump mode Failure phenomenon Operation lamp Timer lamp Defrosting lamp Over current protection of the compress...

Page 36: ...Service manual 32 12 3 Diagnostic chart After energizing no indicator is lighted and the air conditioner can t be operated...

Page 37: ...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 procedure 12 5 Operation lamp...

Page 38: ...12 8 Operation lamp on and Timer lamp flashes EEROM error indoor PCB is defective 12 9 Operation lamp flashes Timer lamp flashes This is alarm signal when the main chip can t detect over zero signal...

Page 39: ...25 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...

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