Toshiba MMY-MAP0804FT7(Z), Service Manual, Page: 2 / 333

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CONTENTS
ORIGINAL INSTRUCTION ........................................................................................... 5
NEW REFRIGERANT (R410A) .................................................................................. 21
1. WIRING DIAGRAMS .............................................................................................. 23
1-1. Outdoor Unit ....................................................................................................................... 23
1-2. Indoor Unit .......................................................................................................................... 25
1-2-1. 4-way Cassette Type ............................................................................................................ 25
1-2-2. Compact 4-way Cassette Type ........................................................................................... 26
1-2-3. 1-way Cassette Type (Compact type)................................................................................. 27
1-2-4. 1-way Cassette Type SH series .......................................................................................... 28
1-2-5. 2-way Air Discharge Cassette Type ................................................................................... 29
1-2-6. Concealed Duct Standard Type .......................................................................................... 30
1-2-7. Concealed Duct Standard Type 6 series ............................................................................ 31
1-2-8. Concealed Duct High Static Pressure Type ...................................................................... 32
1-2-9. Slim Duct Type ..................................................................................................................... 34
1-2-10. Slim Duct Type .................................................................................................................. 35
1-2-11. Ceiling Type ....................................................................................................................... 36
1-2-12. High Wall Type 4MH series ............................................................................................... 37
1-2-13. High Wall Type 3 series .................................................................................................... 38
1-2-14. Floor Standing Cabinet Type ........................................................................................... 39
1-2-15. Floor Standing Concealed Type ...................................................................................... 40
1-2-16. Floor Standing Type.......................................................................................................... 41
1-2-17. Air to Air Heat Exchanger with DX Coil Unit .................................................................. 42
1-3. Flow Selector Unit .............................................................................................................. 46
2. PARTS RATING...................................................................................................... 48
2-1. Outdoor Unit (50Hz model: MMY-MAP
∗∗∗
4FT8-E, MAP
∗∗∗
4FT8-TR, MAP
∗∗∗
4FT8) ... 48
2-2. Outdoor Unit (60Hz model: MMY-MAP
∗∗∗
4FT7) ............................................................ 49
2-3. Outdoor Inverter (50Hz model: MMY-MAP
∗∗∗
4FT8-E, MAP
∗∗∗
4FT8-TR,
MAP
∗∗∗
4FT8) .................................................................................................................... 50
2-4. Outdoor Inverter (60Hz model: MMY-MAP
∗∗∗
4FT7) ...................................................... 51
2-5. Parts Layout in Outdoor Unit ............................................................................................ 52
2-6. Parts Layout in Inverter Assembly.................................................................................... 54
2-7. Outdoor (Inverter) Print Circuit Board .............................................................................. 56
2-7-1. Interface P.C. board (MCC-1606) ......................................................................................... 56
2-7-2. Inverter P.C. board for compressor (MCC-1596) A3-IPDU ................................................ 57
2-7-3. Inverter P.C. board for fan (MCC-1610) ............................................................................... 58
3. REFRIGERANT PIPING SYSTEMATIC DRAWING............................................... 59
4. SYSTEM REFRIGEERANT PIPING SCHEMATIC DIAGRAMS ............................ 64
4-1. Single Cooling mode (Operation of cooling only) when outside temperature is high
(Standard: 10°C or higher) / Defrost mode ...................................................................... 65
4-2. Single Cooling mode (Operation of cooling only) when outside temperature is low
(Standard: 10°C or lower) .................................................................................................. 66
4-3. Single Heating mode (Operation of heating only) .......................................................... 67
4-4. Collective cooling mode (Operating cooling function mainly, collective operation of
cooling and heating operation)......................................................................................... 68
4-5. Collective heating mode (Operating heating function mainly, collective operation of
cooling and heating operation)......................................................................................... 69
4-6. Emergency operation (Single cooling operation at backup of the center unit)........... 70
4-7. Emergency operation (Single heating operation at backup of the center unit)........... 71
4-8. Refrigerant recovery (during pump-down operation) of the troubled outdoor unit) (In
case of trouble of terminal unit) ....................................................................................... 72
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