Collective Cooling Mode; (Operating Cooling Function Mainly, Collective Operation Of Cooling And Heating Operation) - Toshiba MMY-MAP0806FT8P-TR Service Manual

4-5. Collective cooling mode

(Operating cooling function mainly, collective operation of cooling and heating operation)

Outdoor header unit (MMY-MAP1806FT*)
Fan
SV52
FM
SV
PMV1
SV12
SV
TE1
PMV4
TE2
SV
SV11
SV
SV5
SV
TL1
SV6
Fusible
plug
FP
SV3D
Oil
SV
separator
Liquid tank
SV41
SV
TD1
Comp1
SV14
TK1
Check joint
SV3E
（Liquid pipe）
PMV
TCS
SVS
SVD
SVSS
SVDD
TC2 TCJ
Cooling
Outdoor unit
4-Way valve ON SV3A
SV4(n) OFF(*1) SV3B
SV51 OFF SV3C
SV52 OFF SV3D
SV6 Control SV3E
SV11 ON PMV1
SV12 PMV4
ON
OFF(*2)
SV14 Outdoor Fan
(*1) SV4(n) of stopped compressor (n) = ON
(*2) SV14 of stopped outdoor unit = OFF
(*3) It may be controlled.
The outdoor unit which communication line between indoor and outdoor is connected is the "Header unit".
Other outdoor units are called "Follower units".
Fan
Fan motor FM Fan motor
Right side
TO
Main heat exchanger
Right side sub heat exchanger 2
Right side sub heat exchanger 1
Left side
Main heat exchanger
Left side sub heat exchanger 2
Left side sub heat exchanger 1
4-way
valve
TS1
Low-pressure sensor
Check joint
(Low-pressure)
Check joint (High-pressure)
TS2
High-pressure sensor
Accumlator
SV2
SV
SV42
SV3C
SV
TD2
TK4
High
pressure
High
pressure SW
SW
Comp2
TK2
Oil header
TK5
SV3A
SV3B SV
Balance pipe
Liquid pipe
Discharge gas pipe
Suction gas pipe
PMV TCS
SVS
SVD
SVSS
SVDD
TC1 TC2 TCJ TC1
Cooling
Control Cooling thermo ON
Control SVD
Control SVS
Control SVDD
ON SVSS
Close(*3) PMV FS
Control PMV indoor
Control
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
( 32 HP system described in the example of ( 18HP + 14HP ))
Outdoor follower unit (MMY-MAP1406FT*)
SV52
SV
PMV1
PMV4
TE2
SV5
TL1
Fusible
plug
FP
SV3D
Liquid tank
(SV14)
Check joint
（Liquid pipe）
PMV TCS
SVS
SVD
SVSS
SVDD
TC2 TCJ TC1
Stop
FS unit / Indoor unit
Heating thermo ON
OFF SVD ON
ON SVS OFF
OFF SVDD OFF
ON SVSS OFF
Close PMV FS Close PMV FS
Control PMV indoor Control PMV indoor
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
− 67 −
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
SV
SV11
SV
SV
SV6
Check joint (High-pressure)
High-pressure sensor
Accumlator
SV2
SV
Oil
SV
separator
SV41 SV42
SV3C
SV SV
TD1 TD2
TK4
Comp1 Comp2
TK1 TK2
Oil header
SV3E
TK5
0
SV3A
SV3B
SV
PMV TCS
SVS
SVD
SVSS
SVDD
TC2 TCJ TC1
Heating
Stop
SVD OFF
SVS OFF
SVDD OFF
SVSS ON
Close
Close
4-way
valve
TS1
Low-pressure
sensor
Check joint
(Low-pressure)
TS2