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

4-3. Normal Operation (HEAT Mode)

Header unit (MMY-MAP1604*)
PMV1
PMV
TE1
PMV4 TE2
Pressure sensor
(high pressure)
SV3D
TL
SV
SV41
SV
Liquid tank
TD1
Compressor
SV3A
PM
TC2
TC
J
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".
FM
TO
4-Way valve
SV6
SV
SV
SV2
O.S.
Accumulator
SV
SV SV42
SV3C
SV43
HPS HPS TD2
TD3
HPS
TK4
Compressor
Compressor
1 2
3
TK2
TK1
TK3
TK5
SV3E
SV SV3F
SV3B
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
PMV1
PMV2
TS1
TL
Pressure sensor
(low pressure)
Liquid tank
PMV
TC1
TC2
TCJ
Indoor unit
66
Follower unit (MMY-MAP1204*)
FM
TE1
SV
SV5
4-Way valve
Pressure sensor
Pressure sensor
(low pressure)
(high pressure)
SV
SV2
SV3D
O.S.
SV
S V 4 1
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
TS1
S V 4 2
Accumulator
TC1