Mitsubishi Electric M-SERIES Service Manual Download

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Contents

1. SAFETY PRECAUTION ..................................................................................................................................................... 2

1-1. Always observe for safety ......................................................................................................................................... 2

1-2. Cautions related to new refrigerant ........................................................................................................................... 2

2. PART NAMES AND FUNCTIONS ...................................................................................................................................... 3

3. SPECIFICATION ................................................................................................................................................................ 4

4. FAN PERFORMANCE AND CORRECTED AIR FLOW ..................................................................................................... 6

MVZ-A12AA7 ................................................................................................................................................................... 6

MVZ-A18AA7 ................................................................................................................................................................... 7

MVZ-A24AA7 ................................................................................................................................................................... 8

MVZ-A30AA7 ................................................................................................................................................................... 9

MVZ-A36AA7 ................................................................................................................................................................. 10

MVZ-A12, 18, 24, 30, 36AA7 ......................................................................................................................................... 11

5. SOUND PRESSURE LEVELS ......................................................................................................................................... 12

5-1. Sound pressure level .............................................................................................................................................. 12

5-2. NC curves ............................................................................................................................................................... 12

6. OUTLINES & DIMENSIONS ............................................................................................................................................ 15

7. WIRING DIAGRAM .......................................................................................................................................................... 17

8. REFRIGERANT SYSTEM DIAGRAM .............................................................................................................................. 18

9. HEATER CONTROL ......................................................................................................................................................... 19

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........................................................................................................... 19

9-2. Fan control .............................................................................................................................................................. 21

9-3. CN24RELAY-KIT-CM3 (Optional Parts) installation ................................................................................................ 22

10. HUMIDIFIER CONTROL ................................................................................................................................................ 24

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........................................................................................................................................... 24

10-2. Installation ............................................................................................................................................................. 24

11. ERV (ENERGY RECOVERY VENTILATION) CONTROL ....................................................................................................................... 25

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............................................................................................................................................ 25

12. TROUBLESHOOTING ................................................................................................................................................... 26

12-1. Cautions on troubleshooting ................................................................................................................................. 26

12-2. Self-check function ................................................................................................................................................ 27

12-3. Self-diagnosis action table .................................................................................................................................... 29

12-4. Troubleshooting by inferior phenomena ............................................................................................................... 33

12-5. Test point diagram ................................................................................................................................................. 34

12-6. Trouble criterion of main parts............................................................................................................................... 36

12-7. Thermistor ............................................................................................................................................................. 36

12-8. DC Fan motor (FAN MOTOR/INDOOR CONTROLLER BOARD) ....................................................................... 37

12-9. Functions of DIP switch and jumper wire .............................................................................................................. 38

13. DISASSEMBLY PROCEDURE ...................................................................................................................................... 39

13-1. Control box ............................................................................................................................................................ 39

13-2. Thermistor (Return Air) .......................................................................................................................................... 40

13-3. Coil Assembly........................................................................................................................................................ 41

13-4. Blower/Fan Assembly............................................................................................................................................ 43