Normal Operation (Cool Mode) - Low Outside Air Temperature (Roughly Below 20 °C) - Toshiba MMY-MAP0804HT8-E Service Manual

4-2. Normal Operation (COOL Mode) - Low Outside Air
Temperature (Roughly Below 20 °C)
PMV1
PMV2
PMV4
TL
Liquid tank
PMV
TC2
TCJ
Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication
line is connected. All other outdoor units are called "follower units".
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Header unit (MMY-MAP1604*)
FM
TE1
TE2
Pressure sensor
(high pressure)
SV6
SV
SV
SV2
SV3D
O.S.
SV
SV41
SV
SV SV42
SV3C
TD1 HPS HPS
TD2
HPS
TK4
Compressor Compressor
1 2
TK2
TK1
TK5
SV3E
SV SV3F
SV3A
Balance pipe
PMV
TC1
TC2
TCJ
High-pressure gas or condensate liquid refrigerant
Evaporative gas refrigerant (low-pressure gas)
Normal refrigerant line
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TO
PMV1
4-Way valve
TS1
TL
Pressure sensor
(low pressure)
Accumulator
SV
Liquid tank
SV43
TD3
Compressor
3
TK3
SV3B
SV
Liquid pipe
Gas pipe
Gas pipe
Liquid pipe
PMV
TC1
TC2
TCJ
Indoor unit
Note: With a 14 or 16 HP outdoor unit, the main heat exchanger and sub-heat
exchanger may be switched over depending on the outside temperature and
air conditioning loads.
(The diagram shows a 28 HP system (16 HP + 12 HP) as an example.)
65
Follower unit (MMY-MAP1204*)
FM
TE1
SV
SV5
PMV2
4-Way valve
Pressure sensor
Pressure sensor
(low pressure)
(high pressure)
SV
SV2
SV3D O.S.
SV
SV41
SV SV
TD2
TD1
HPS HPS
SV3C
A3 TK4
Compressor Compressor
1 2
TK2
TK1
SV3E TK5
SV3A
SV SV3B
PMV
TC1
TC2
TCJ
TO
TS1
SV42
Accumulator
TC1