Midea MSQ-07CR Service Manual Download Page 14 | Manualshive

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Service manual

11

6. Operation limits

6.1

Cooling operation

Outdoor unit air temp.

℃

DB

Indoor air temp.

℃

DB

Note: The chart is the result 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 is the result from the continuous operation under constant air temperature conditions. However, excludes the initial

pull-down stage.

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Summary of Contents for MSQ-07CR

Page 1: ...1 MSQ 07CR MSQ 07HR MSQ 09CR MSQ 09HR MSQ 12CR MSQ 12HR All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 2: ...3 Pipe length and the elevation 16 8 4 Air purging of the piping and indoor unit 17 8 5 Pumping down Re installation 18 8 6 Re air purging Re installation 19 8 7 Balance refrigerant of the 2 way 3 wa...

Page 3: ...eshooting 39 13 1 For all cooling only model 39 13 2 For all heat pump model 39 13 3 Diagnostic chart 40 13 4 Resetting phenomenon often occurs during operation 41 13 5 Operation lamp flashes and Time...

Page 4: ...nd wet or damage furniture Take care to ensure that power cable could not be pulled out or damaged during operation There is risk of fire or electric shock Do not place anything on the power cable The...

Page 5: ...perty 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...

Page 6: ...the LED LCD for each operation mode The fan is turn to low speed cooling heating The unit will be turn off after seven hours Sleep mode auto control The function is usually used in rainy days in spri...

Page 7: ...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 except d...

Page 8: ...Service manual 5 3 Dimension 3 1 Indoor unit MSQ 07 09 12C H R All manuals and user guides at all guides com...

Page 9: ...Service manual 6 3 2 Outdoor unit MSQ 07 09C H R All manuals and user guides at all guides com...

Page 10: ...Service manual 7 MSQ 12C H R All manuals and user guides at all guides com...

Page 11: ...800 1040 900 800 1040 900 800 Indoor air flow Hi Mi Lo m3 h 490 520 470 420 520 Indoor noise level Hi Mi Lo dB A 34 31 25 35 31 26 35 31 26 Outdoor fan motor Model YDK24 6T YDK24 6T YDK24 6T Brand Wel...

Page 12: ...d hi mi lo r min 1060 940 880 1130 1130 1080 1030 Indoor air flow Hi Mi Lo m3 h 520 470 420 550 550 500 450 Indoor noise level Hi Mi Lo dB A 35 31 26 37 33 27 37 33 27 Outdoor fan motor Model YDK24 6T...

Page 13: ...Service manual 10 5 Refrigerant cycle diagram Cooling only Heat pump mode All manuals and user guides at all guides com...

Page 14: ...peration 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 the result from the...

Page 15: ...Service manual 12 7 Schematic diagram and Wiring diagram 7 1 Schematic diagram All manuals and user guides at all guides com...

Page 16: ...Service manual 13 7 2 Wiring diagram MSQ3 07CR MSQ3 09CR MSQ3 12CR All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 17: ...Service manual 14 MSQ3 07HR MSQ3 09HR MSQ3 12HR MSQ3 12HR All manuals and user guides at all guides com...

Page 18: ...Service manual 15 All manuals and user guides at all guides com...

Page 19: ...heet Grade Unit 7K 9K 12K mm2 1 0 1 0 1 5 8 3 Pipe length and the elevation Capacity Btu h Pipe size Standard length m Max Elevation B m Max Pipe length A m Additional refrigerant g m GAS LIQUID 07k 0...

Page 20: ...n for gas leakage 4 Purge the air from the system Set the 2 way valve to the open position and remove the cap from the 3 way valve s service port Using the hexagonal wrench to press the valve core pin...

Page 21: ...e 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 the close position 6 Operate the a...

Page 22: ...es 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 refrigerant Close the va...

Page 23: ...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 air conditioner is not...

Page 24: ...pa 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 after turning off the...

Page 25: ...efrigerant 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 approximately 1 minu...

Page 26: ...oling mode Outdoor temperature Dry bulb temp Indoor Conditions Pressure 25 C 30 C 35 C 40 C 45 C 50 C 21 C D 15 C W Pressure kg cm2 6 2 6 7 7 2 8 0 8 5 9 4 24 C D 17 C W Pressure kg cm2 6 3 6 5 7 5 8...

Page 27: ...ions Pressure 25 C 30 C 35 C 40 C 45 C 50 C 21 C D 15 C W Pressure kg cm2 7 8 8 1 8 4 9 0 9 3 10 0 24 C D 17 C W Pressure kg cm2 7 9 8 2 8 7 9 0 9 5 10 1 27 C D 19 C W Pressure kg cm2 8 0 8 5 9 2 9 9...

Page 28: ...ions Pressure 25 C 30 C 35 C 40 C 45 C 50 C 21 C D 15 C W Pressure kg cm2 8 4 8 5 8 8 8 9 9 4 9 9 24 C D 17 C W Pressure kg cm2 8 6 8 8 9 2 9 4 10 0 10 4 27 C D 19 C W Pressure kg cm2 8 8 9 2 9 4 9 8...

Page 29: ...07 Sensitive capacity kW 1 57 1 59 1 57 1 55 1 53 1 54 Input kW 0 71 0 79 0 87 0 95 1 03 1 10 10 2 MSQ 07HR SUMMER OUTDOOR TEMPERATURE DRY Indoor Conditions 25 C 30 C 35 C 40 C 45 C 50 C 21 C D 15 C...

Page 30: ...ATURE DRY Indoor Conditions 25 C 30 C 35 C 40 C 45 C 50 C 21 C D 15 C W Total capacity kW 2 44 2 32 2 16 1 98 1 82 1 70 Sensitive capacity kW 1 68 1 63 1 56 1 48 1 40 1 34 Input kW 0 87 0 95 1 02 1 09...

Page 31: ...57 Input kW 0 89 0 97 1 05 1 14 1 22 1 30 32 C D 23 C W Total capacity kW 3 12 2 98 2 86 2 76 2 63 2 50 Sensitive capacity kW 1 83 1 85 1 84 1 81 1 78 1 79 Input kW 0 88 0 98 1 07 1 17 1 27 1 37 WINT...

Page 32: ...tive capacity kW 2 56 2 59 2 57 2 53 2 50 2 51 Input kW 1 15 1 26 1 43 1 53 1 66 1 80 10 6 MSQ 12HR SUMMER OUTDOOR TEMPERATURE DRY Indoor Conditions 25 C 30 C 35 C 40 C 45 C 50 C 21 C D 15 C W Total c...

Page 33: ...3 64 2 31 1 90 1 83 Input kW 1 36 1 29 1 14 0 96 0 88 0 84 18 C Capacity kW 4 39 3 92 3 52 2 18 2 00 1 84 Input kW 1 50 1 29 1 16 1 03 0 97 0 87 20 C Capacity kW 4 36 3 96 3 49 2 07 1 84 1 80 Input kW...

Page 34: ...ing temperature TE7 Evaporator high temperature protection compressor off temperature TE8 Evaporator high temperature protection fan off temperature TE9 Evaporator high temperature protection restorin...

Page 35: ...s off for continuously 4 times due to current protection in 5 minutes from Compressor On the unit stops and LED displays failure information and can t returns to normal operation automatically 11 4 Fa...

Page 36: ...Compressor and Outdoor Fan LOW ON 6minutes BREEZE OFF 4minutes LOW ON 5minutes BREEZE OFF 5minutes LOW ON 4minutes BREEZE OFF 6minutes A B C Repeat on and off cycle 11 6 4 Low room temperature protec...

Page 37: ...mpressor must run for 7 minutes after starting and then judge temperature Meanwhile other protections are still valid Ts 2 T Room temp up Room temp down Ts 3 Compressor and outdoor fan off Compressor...

Page 38: ...for the first time 11 8 Defrosting mode available for heating mode 11 8 1 Defrosting condition Defrosting starts when either of the following A and B are satisfied A The compressor keeps running for 4...

Page 39: ...ng Actions Defrost 10or 7 5minutes 45S 25S Compressor 4 way Valve 23S 40S Outdoor Fan Indoor Fan 10S 11 9 Auto mode 11 9 1 The air conditioner automatically selects one of the following operation mode...

Page 40: ...urs later the set temperature will maintain as a constant and the air circulation is kept at low speed Cold air proof function takes precedence over all The total time is 7 hours after 7 hours the uni...

Page 41: ...A 8A 8A IRESTORE 4 2A 4 2A 5A 5A 6A 6A IDEFROST 3 2A 4 5A 5 5A TE1 28 28 28 TE2 32 32 32 TE3 30 30 30 TE4 20 20 20 TE5 2 2 2 2 2 2 TE6 7 7 7 7 7 7 TE7 60 60 60 TE8 53 53 53 TE9 50 50 50 ANGLCOOL 200 2...

Page 42: ...EEROM error On No over zero signal Extinguish Flash at 5Hz 13 2 For all heat pump model Failure phenomenon Operation lamp Timer lamp Defrosting lamp Over current protection of the compressor occurs 4...

Page 43: ...pply outputs to indoor PCB Check 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 seco...

Page 44: ...CB 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 5 Operation lamp flashes and...

Page 45: ...ntrol board check if the failure realease Power supply fault No Outdoor unit fault such as the compressor 13 8 Operation lamp on and Timer lamp flashes EEROM error indoor PCB is defective 13 9 Operati...

Page 46: ...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 8778 32 7 2946 59 2 4468 6 25 4954...

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