Single Heating Mode (Operation Of Heating Only) - Toshiba MMY-MAP0804FT8(ZG)-E Service Manual

4-3. Single Heating mode (Operation of heating only)

Outdoor header unit (MMY-MAP1404FT
PMV2
PMV1
PMV4
TE2
SV5
TL
Fusible
plug
FP
SV3D
Liquid
tank
SV14
Check
joint
(Liquid
pipe)
TC2 TCJ
4-Way valve
SV4(n)
SV5
Control
SV6
SV11
SV14
PMV1, 2 Control
PMV4
The outdoor unit which communication line between indoor and outdoor is connected is the "Header unit".
Other outdoor units are called "Follower units".
AMP Air Conditioning
Fan
FM
Fan motor
Right side
Main
heat exchanger
Right side sub heat exchanger
Left side
Main
heat exchanger
TE1
Left side sub heat exchanger
SV11
SV
SV
TS1
SV
Check joint
SV6
( High pressure)
High pressure
Oil separator
sensor
Accumulator
SV2
SV
SV
SV42
SV41
High
High
pressure
High
SV
SV pressure
SW
pressure
SW
SW
TD1 TD2
TK4
Comp.
Comp. Comp.
2 3
1
(Inverter) (Inverter) (Inverter)
TK2 TK3
TK1
Oil header
TK5
SV3F SV
SV3B
SV
Balance pipe
Liquid pipe
Dischage gas pipe
Suction gas pipe
TC1
TC2 TCJ
Heating
Outdoor Unit
Control
SV3A
ON
Control
SV3B
OFF Control
SV3C
Control
SV3D
ON SV3E ON
Control
SV3F
Outdoor fan
Control
(24 HP system described in the example of (14 HP + 10 HP))
∗
) Outdoor follower unit (MMY-MAP1004FT
TO
PMV2
PMV1
PMV4
TE2
4-way
w SV5
valve
pressure
sensor
Check
joint
(Low
TS2
pressure
Fusible
plug
FP
Liquid
tank
SV SV43
TD3
SV14
Check
joint
(Liquid
pipe)
TC1 TC2 TCJ
Heating
FS unit / indoor unit
Heatling thermo ON Heatling thermo OFF
ON ON
SVD SVD
SVS OFF SVS OFF
OFF OFF
SVDD SVDD
SVSS OFF SVSS OFF
PMV Control PMV OFF
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
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Fan
FM
Fan motor
Right side
Main
heat exchanger
Right side sub heat exchanger
Left side
Main
heat exchanger
TE1
Left side sub heat exchanger
SV
TS1
SV
Check joint
SV6
( High pressure)
TS2
High pressure sensor
Oil separator
SV2
SV
SV3D
SV
Accumulator
SV41
SV42
High
pressure
SV High SV
SW
pressure
SW
TD1
TD2
TK4
Comp. Comp.
1 2
(Inverter)
(Inverter)
TK1
TK2
Oil header
TK5
SV3B
SV
TC2 TCJ
TC1
Heating
Stop
thermo OFF
Stop
OFF
SVD
SVS OFF
SVDD OFF
SVSS
ON
PMV Close
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
∗
)
TO
4-way
valve
Low
pressure
sensor
Check
joint
(Low
pressure
TC1