Single Cooling Mode (Operation Of Cooling Only) When Outside Temperature Is High; (Standard: 10°C Or Higher) / Defrost Mode - Toshiba MMY-MAP0804FT8(ZG)-E Service Manual

4-1. Single Cooling mode (Operation of cooling only) when outside temperature is high

(Standard: 10°C or higher) / Defrost mode
Outdoor header unit (MMY-MAP1404FT
PMV2
PMV1
PMV4
TE2
SV5
TL
SV6
Fusible
plug
FP
SV3D
Liquid
tank
SV14
Check
joint
(Liquid
pipe)
TC2 TCJ
Outdoor Unit
4-Way valve
ON
SV4(n)
SV5 ON
Control
SV6
SV11 OFF
SV14 OFF
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
TO
Main
heat exchanger
Right side sub heat exchanger
Left side
Main
heat exchanger
TE1
Left side sub heat exchanger
SV11
SV
SV
SV
Check joint
( High pressure)
High pressure
Oil separator
sensor
Accumulator
SV2
SV
SV
SV41 SV42
High
pressure
High High
SV SW SV
pressure
pressure
SW
SW
TD1 TD2
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
Cooling
Control Cooling thermo ON
SV3A
Control
SV3B SVD
Control
SV3C SVS
SV3D Control SVDD
SV3E ON SVSS
Control PMV
SV3F
Outdoor fan Control
(24 HP system described in the example of (14 HP + 10 HP))
∗
) Outdoor follower unit (MMY-MAP1004FT
PMV1 PMV2
PMV4
TE2
4-way
valve
SV5
Low
pressure
TS1
sensor
Check
TL
joint
TS2 (Low
pressure
Fusible
plug
FP
Liquid
tank
SV SV43
TD3
SV14
Check
joint
(Liquid
pipe)
TC1 TC2 TCJ
Cooling
FS unit / indoor unit
Stop
OFF SVD OFF
SVS OFF
ON
OFF SVDD OFF
ON SVSS ON
Control PMV Close
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
– 65 –
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
Check joint
SV6
( High pressure)
TS2
High pressure sensor
Oil separator
SV2
SV
SV3D
SV
Accumulator
SV41
High
High
pressure
SV SW pressure SV
SW
TD1
Comp.
Comp.
2
1
(Inverter)
(Inverter)
TK1 TK2
Oil header
TK5
SV3B
SV
TC2 TCJ
TC1
Cooling Stop
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
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∗
)
TO
4-way
valve
Low
TS1 pressure
sensor
Check
joint
(Low
pressure
TC1