All Cooling Mode (Operation Of Cooling Only) When Outside Temperature Is; (Standard: 50゜F ~ 90゜F) / Defrost Mode - Toshiba MMY-MAP0726FT2P-UL Service Manual

5-2. All Cooling mode (Operation of cooling only) when outside temperature is middle
(Standard: 50゜F ~ 90゜F) / Defrost mode
Oudoor header unit (MMY-MAP0726FT*-UL)
PMV1
TE1
PMV4
TE2
PMV3
SV
SV
SV5
SV
TL1
SV6
Fusible
plug
FP
SV3D
SV
Liquid tank
SV41
SV
TD1
(SV14)
SV3E
Check joint
（Liquid pipe）
PMV
TCS
SVD
SVDD
TC2 TCJ
Cooling
Outdoor unit
4-Way valve OFF
SV4(n) OFF(*1)
SV5 ON
SV6 Control
SV11 OFF
SV12 OFF(*2)
SV14 OFF
SV15 ON
(*1) SV4(n) of stopped compressor (n) = ON
(*2) It may be controlled.
(*3) In defrost mode, PMV4 ,PMV FS and PMV indoor also open.
The outdoor unit which communication line between indoor and outdoor is connected is the "Header unit".
Other outdoor units are called "Follower units".
Fan
FM
Fan motor
Right side
TO
Main heat exchanger
Right side sub heat exchanger
Left side
Main heat exchanger
Left side sub heat exchanger
SV15
4-way
SV11
valve
TS1
Low-pressure sensor
Check joint (High-pressure)
High-pressure sensor
TS2
Accumlator
SV2
SV
Oil
separator
SV42
SV3C
SV
TD2
TK4
Comp1 Comp2
TK1 TK2
Oil header
TK5
0
SV3A
SV3B
SV
Balance pipe
Liquid pipe
Discharge gas pipe
Suction gas pipe
PMV TCS
SVS
SVD
SVSS
SVDD
TC1 TC2 TCJ
Cooling
SV3A Control Cooling thermo ON
SV3B Control SVD
SV3C Control SVS
SV3D Control SVDD
SV3E ON SVSS
PMV1 Control PMV FS
PMV3 Close PMV indoor
PMV4 Close(*3)
Outdoor Fan Control
( 12 ton system described in the example of ( 6ton + 6ton ))
Outdoor follower unit (MMY-MAP0726FT*-UL)
PMV1
TE2
Check joint
TL1
(Low-pressure)
Fusible
plug
FP
Liquid tank
Fusible
plug
FP
(SV14)
Check joint
（Liquid pipe）
PMV TCS
SVS
SVD
SVSS
SVDD
TC1 TC2 TCJ
Cooling
FS unit / Indoor unit
Cooling thermo OFF
OFF SVD OFF
ON SVS OFF
OFF SVDD OFF
ON SVSS ON
Close(*3) PMV FS Close(*3)
Control(*3) PMV indoor Close(*3)
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
− 42 −
Fan
FM
Fan motor
Right side
Main heat exchanger
Right side sub heat exchanger
Left side
Main heat exchanger
TE1
PMV4
Left side sub heat exchanger
PMV3
SV
SV11
SV
SV5
SV
SV6
Check joint (High-pressure)
High-pressure sensor
SV2
SV3D
SV
Oil
SV
separator
SV41 SV42
SV3C
SV
TD1 TD2
TK4
Comp1 Comp2
TK1 TK2
Oil header
SV3E
TK5
SV3A
SV
PMV TCS
SVS
SVD
SVSS
SVDD
TC1 TC2 TCJ
Stop
Stop
SVD OFF
SVS OFF
SVDD OFF
SVSS ON
PMV FS Close(*3)
PMV indoor Close(*3)
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
TO
SV15
4-way
valve
TS1
Low-pressure sensor
Check joint
(Low-pressure)
TS2
Accumlator
Fusible
plug
SV
FP
0
SV3B
SVS
SVSS
TC1