Midea Corona MSC-07CRN1 Technical & Service Manual

Corona series (7000-18000btu) r410a wall mounted split type, heat pump air conditioners

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Service manual (48 pages)

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Page 1 GD Midea Refrigeration Equipment Co.,Ltd SPLIT TYPE, HEAT PUMP AIR CONDITIONERS Technical & service manual 2005 Corona Series(7000-18000BTU) R410a Wall Mounted [Models] MSC-07CRN1 MSC-07HRN1 MSC-09CRN1 MSC-09HRN1 MSC-12CRN1 MSC-12HRN1 MSC-18CRN1 MSC-18HRN1 Downloaded from AC-Manual.com Manuals...
Page 2: Table Of Contents
Corona Series (R410A) Contents 1. Features………………………………………………………………… 02 2. Specification………………………………………………………..……03 3. Dimensions…………………………………………………………..… 05 4. Refrigeration cycle diagram……………………………………………09 5. Pressure table…………….……………………………………….……10 6. Capacity table…………………………………………………………...14 7. Wiring diagram…………………………………………………..………20 8. Electronic function………………………………………….…………...25 9. Troubleshooting……………………………………………………….…33 10. Characteristic of temp. sensor…………………………………………36 Downloaded from AC-Manual.com Manuals...
Page 3: Features
1.Features 1.1 Compact design 1.2 High efficiency and quiet operation 1.3 A class energy level Downloaded from AC-Manual.com Manuals...
Page 4: Specification
2.Specification Model MSC-07CRN1 MSC-07HRN1 MSC-09CRN1 MSC-09HRN1 Power supply Ph-V-Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz Capacity Btu/h 7000 7000 9000 9000 Input Cooling Rated current Btu/w.h, w/w 11,3.2 11,3.2 11,3.2 11,3.2 Capacity Btu/h 8500...
Page 5 Model MSC-12CRN1 MSC-12HRN1 MSC-18CRN1 MSC-18HRN1 Power supply Ph-V-Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz Capacity Btu/h 12000 12000 18000 18000 Input 1120 1120 1720 1720 Cooling Rated current Btu/w.h, w/w 11,3.2 11,3.2 10.5,3.1 10.5,3.1 Capacity 15000 19000 Input 1180...
Page 6: Dimensions
3.Dimensions 3.1 Indoor unit MSC-07CRN1, MSC-07HRN1, MSC-09CRN1, MSC-09HRN1 3.2 Indoor unit MSC-12CRN1, MSC-12HRN1 Downloaded from AC-Manual.com Manuals...
Page 7 3.2 Indoor unit MSC-18CRN1, MSC-18HRN1 Downloaded from AC-Manual.com Manuals...
Page 8 3.4 Outdoor unit MSC-07CRN1, MSC-07HRN1 3.5 Outdoor unit MSC-09CRN1, MSC-09HRN1, MSC-12CRN1, MSC-12HRN1 Downloaded from AC-Manual.com Manuals...
Page 9 MSC-18CRN1, MSC-18HRN1 Downloaded from AC-Manual.com Manuals...
Page 10: Refrigeration Cycle Diagram
4.Refrigeration cycle diagram Downloaded from AC-Manual.com Manuals...
Page 11: Pressure Table
5. Pressure table Note: *The pressure data is from 3 way valve, the pressure data are pressure above atmosphere. *D: Dry bulb temp. *W: Wet bulb temp. 5.1 MSC-07CRN1 Cooling mode Outdoor temperature (Dry bulb temp) Pressure 25ºC 30ºC 35ºC 40ºC...
Page 12 5.3 MSC-09CRN1 Cooling mode Outdoor temperature (Dry bulb temp) Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Indoor Conditions 21ºC D Pressure 10.0 15ºC W ( kg/cm 24ºC D Pressure 10.1 17ºC W ( kg/cm 27ºC D Pressure 10.2 10.8 19ºC W ( kg/cm 32ºC D Pressure...
Page 13 5.5 MSC-12CRN1 Outdoor temperature (Dry bulb temp) Cooling mode Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Indoor Conditions 21ºC D Pressure 15ºC W ( kg/cm 24ºC D Pressure 10.0 10.4 17ºC W ( kg/cm 27ºC D Pressure 10.3 10.9 19ºC W ( kg/cm 32ºC D Pressure...
Page 14 5.7 MSC-18CRN1 Outdoor temperature (Dry bulb temp) Cooling mode Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Indoor Conditions 21ºC D Pressure 15ºC W ( kg/cm 24ºC D Pressure 10.0 10.5 17ºC W ( kg/cm 27ºC D Pressure 10.4 10.9 19ºC W ( kg/cm 32ºC D Pressure...
Page 15: Capacity Table
6. Capacity table 6.1 MSC-07CRN1 SUMMER OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions Total capacity kW 2.04 1.94 1.61 1.53 1.41 21ºC D Sensitive capacity kW 1.52 1.41 1.39 1.32 1.19 1.07 15ºC W Input kW.
Page 16 WINTER OUTDOOR CONDITIONS 12ºC D 7ºC D 4ºC D 0ºC D -4ºC D -7ºC D Indoor 11ºC W 6ºC W 3ºC W -1ºC W -6ºC W -8ºC W Conditions Capacity kW 3.01 2.73 2.47 1.76 1.65 1.58 15ºC Input kW. 0.76 0.66 0.58...
Page 17 6.4 MSC-09HRN1 SUMMER OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions Total capacity kW 2.42 2.41 2.24 2.03 1.87 1.75 21ºC D Sensitive capacity kW 1.72 1.69 1.65 1.53 1.43 1.36 15ºC W Input kW. 0.72 0.75 0.84 0.89 0.97...
Page 18 6.5 MSC-12CRN1 SUMMER OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions Total capacity kW 3.276 3.187 3.105 2.821 2.746 2.621 21ºC D Sensitive capacity kW 2.567 2.457 2.413 2.287 2.21 2.087 15ºC W Input kW. 0.89 1.01 1.082 1.188 1.243...
Page 19 WINTER OUTDOOR CONDITIONS 12ºC D 7ºC D 4ºC D 0ºC D -4ºC D -7ºC D Indoor 11ºC W 6ºC W 3ºC W -1ºC W -6ºC W -8ºC W Conditions Capacity kW 4.446 4.264 4.132 3.838 3.335 3.305 15ºC Input kW. 1.141 1.106 1.059...
Page 20 6.8 MSC-18HRN1 SUMMER OUTDOOR TEMPERATURE DRY Indoor 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC Conditions Total capacity kW 4.914 4.781 4.658 4.232 4.119 3.932 21ºC D Sensitive capacity kW 3.851 3.686 3.620 3.431 3.315 3.131 15ºC W Input kW. 1.335 1.515 1.623 1.782 1.865...
Page 21: Wiring Diagram
7. Schematic diagram and wiring diagram 7.1 Schematic diagram IN4007*4 7812 +12V-a 7805 说明： Vout Vout 不带掉电记忆；不接，带掉电记忆。 1.JR1=2K R19 150 去掉预留的换气功能，控制口的输出功能去掉，保留输入功能，用做自检检测口。 REC1 IN4148 +12V...
Page 22 7.2 Wiring diagram 7.2.1 Cooling only 7.2.1.1 MSC-07CRN1, MSC-09CRN1 MSC-12CRN1 IND OO R UNIT OUT DO OR UNIT 1 2(N) Y&G BLACK BLACK BLACK MOTOR BLUE BLUE Y&G COMPRESSOR CAPACITOR Downloaded from AC-Manual.com Manuals...
Page 23 7.2.1.2 MSC-18CRN1 INDOOR UNIT OUTDOOR UNIT Y&G BLACK BLACK OVERLOAD BLACK RELAY COMPRESSOR MOTOR BLUE WHITE BLUE COMPRESSOR CAPACITOR CAPACITOR Downloaded from AC-Manual.com Manuals...
Page 24 7.2.2 Heating/cooling 7.2.2.1 MSC-07HRN1, MSC-09HRN1 MSC-12HRN1 IND OOR UN IT OUT DOOR U NIT Downloaded from AC-Manual.com Manuals...
Page 25 7.2.2.2 MSC-18HRN1 INDOOR UNIT OUTDOOR UNIT BLUE BLUE Y&G 4-WAY BLACK OVERLOAD RELAY BLACK BLACK COMPRESSOR BLUE MOTOR WHITE BLUE COMPRESSOR CAPACITOR FAN CAPACITOR Downloaded from AC-Manual.com Manuals...
Page 26: Electronic Function
8 Electronic function Electric Control working environment 8.1.1 input voltage: 175~253V 8.1.2 Input power frequency:50Hz 8.1.3 Ambient temperature: -7°C~+43°C 8.1.4 Indoor fan normal working amp is less than 1A, 8.1.5 Outdoor fan. Normal working amp is less than 1.5A 8.1.6 Four-way valve normal working amp is less than 1A.
Page 27 Protection 8.4.1 3 minutes delay at restart for compressor. 8.4.2 Sensor protection at open circuit and breaking disconnection 8.4.3 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 information and can’t returns to normal operation automatically.
Page 28 Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. ) Condition Compressor Outdoor fan Temp. Time Evaporator T> TE6 Temp. up T< TE6 >5 Minutes Evaporator T> TE5 Temp. down T< TE5 >5 Minutes Dehumidifying mode 8.7.1 The 4-way valve is off in dehumidifying mode 8.7.2 Compressor and Indoor Fan actions in dehumidifying mode Conditions...
Page 29 8.7.3 Low room temperature protection: When room temperature decreases to below 10℃, compressor and outdoor fan will stop(indoor fan is Breeze). Dehumidifying operation will be resumed when room temperature restores to over 13℃. 8.7.4 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as that of cooling mode.
Page 30 8.8.6 Indoor evaporator high-temperature protection at heating mode Condition Compressor Outdoor fan T= Indoor exchanger temp. Indoor exchanger temp. up T<TE8 TE8<T<TE7 T>TE7 Indoor exchanger temp. down T>TE9 T<TE9 8.8.7. The louver opens to Standard Angle ANGLHEAT when power is on for the first time Defrosting operation (Available for heating only).
Page 31 8.9.4 Defrosting Actions: Defrost 10or 6minutes Compressor 4-way Valve Outdoor Fan Indoor Fan 8.10 Automatic operation mode 8.10.1 The air conditioner automatically selects one of the following operation modes: cooling, heating or fan only according to the temp. difference between room temp. (TA) and set temp. (TS). TA—TS Operation mode TA—TS>2℃...
Page 32 constant and the fan speed is kept at low speed. The total time is 7 hours, after 7 hours the unit stops. 8.14.3 Heating: The set temperature decrease 1℃ per hour. Two hours 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).
Page 33 8.18 Models and Parameters Model MSC-07CRN1 MSC-07HRN1 MSC-09CRN1 MSC-09HRN1 MSC-12CRN1 MSC-12HRN1 I3SEC 7.5A 7.5A 10.0A 10.0A 12.0A 12.0A I5MIN 6.2A 6.2A 7.5A 7.5A 8.5A 8.5A IFAN 5.2A 5.2A 5.5A 5.5A 7.5A 7.5A IRESTORE 4.2A 4.2A 4.5A 4.5A 6.5A 6.5A IDEFROST 3.2A...
Page 34: Troubleshooting
9.Troubleshooting 9.1 Display board Signal receptor AU TO indicator Thi s indicator illuminates whe n the air conditioner i s in AUTO operation. DE FROST indicator (F or Cooling & H eating mo dels only) Thi s indicator illuminates whe n the air conditioner starts defrostin g automati cally or when the warm air control fea ture is activated in he ating oper ation.
Page 35 9.3 Diagnostic Chart 9.3.1 After energizing, no indicator is lighted and the air conditioner can’t be operated. After energizing, the air conditioner can’t be operated Check if AC220V power supply outputs to Indoor PCB. Check if AC220V exists at the primary coil of transformer. Indoor PCB is defective Check if AC14.5V exists at the secondary coil of transformer.
Page 36 9.3.3 Failure phenomenon Failure phenomenon Operation lamp Timer lamp Indoor fan speed has been out of control for over 1 minute ☆ Indoor room temp. or evaporator sensor is open circuit or short circuit ☆ Over current protection of the compressor occurs 4 times ☆...
Page 37: Characteristic Of Temp. Sensor
10. Characteristic of temp. sensor Temp.℃ Resistance KΩ Temp.℃ Resistance KΩ Temp.℃ Resistance KΩ 62.2756 14.6181 4.3874 58.7079 13.918 4.2126 56.3694 13.2631 4.0459 52.2438 12.6431 3.8867 49.3161 12.0561 3.7348 46.5725 11.5 3.5896 10.9731 3.451 41.5878 10.4736 3.3185 39.8239 3.1918 37.1988 9.5507 3.0707 35.2024...

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