Normal Operation (Heat Mode) - Toshiba MMY-MAP0804HT8-E Service Manual

4-3. Normal Operation (HEAT Mode)

PMV1
PMV
PMV4
TL
Liquid tank
PM
TC2
TC
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Header unit (MMY-MAP1604*)
FM
TE1
TE2
4-Way valve
Pressure sensor
(high pressure)
SV6
SV
SV
SV2
SV3D
O.S.
SV
SV41
SV SV42
SV
SV3C
TD1
HPS HPS TD2
HPS
TK4
Compressor
Compressor
Compressor
1 2
TK2
TK1
TK3
TK5
SV3E
SV SV3F
SV3A
SV
Balance pipe
Liquid pipe
Gas pipe
Gas pipe
Liquid pipe
PMV
TC1
TC2
TCJ
High-pressure gas or condensate liquid refrigerant
Evaporative gas refrigerant (low-pressure gas)
Normal refrigerant line
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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TO
PMV1
PMV2
TS1
TL
Pressure sensor
(low pressure)
Accumulator
SV
Liquid tank
SV43
TD3
3
SV3B
PMV
TC1
TC2
TCJ
Indoor unit
66
Follower unit (MMY-MAP1204*)
FM
TE1
SV
SV5
4-Way valve
TS1
Pressure sensor
Pressure sensor
(low pressure)
(high pressure)
SV
SV2
SV3D O.S.
SV
S V 4 1 S V 4 2
SV SV
TD1 TD2
HPS HPS
SV3C
A3
TK4
Compressor Compressor
1 2
TK2
TK1
SV3E
TK5
SV3A
SV3B
SV
PMV
TC1
TC
TCJ
(The diagram shows a 28 HP system
(16 HP + 12 HP) as an example.)
TO
Accumulator
TC1