Normal Operation (Cool Mode) - Low Outside Air Temperature (Roughly Below 20°C) - Toshiba MMY-MAP0806HT8(J)P Service Manual

4-2. Normal Operation (COOL Mode) - Low Outside Air
Temperature (Roughly Below 20°C)
Header unit (MMY-MAP1606HT*)
PMV1
PMV3
TL1
TL2
TS3
FP
SV3D
Fusible
Plug
Liquid tank
Sub cool
heat exchanger
PMV4
TL3
Check joint
TC2 TCJ
Outdoor Unit
OFF
4-Way valve
OFF(*1)
SV4(n)
OFF
SV52
Close(*2)
PMV1
Control Outdoor fan Control
PMV3
Close(*2)
PMV4
(*1) SV4 (n) of stopped compressor (n)=ON
(*2) 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".
AMP Air Conditioning
Fan
M
Fan motor
Right side
Main heat exchanger
Right side Sub heat exchanger
Left side
Main heat exchanger
TE1
Left side Sub heat exchanger
TE2
4-Way valve
TS1
Check Joint
Pressure sensor
(high pressure)
SV2
Accumulator
SV
Oil
Separator
SV
SV41 SV42
SV3C
SV SV
TD1 TD2
TK4
HPS HPS
圧縮機
１
(ｲﾝﾊﾞｰﾀ)
Compressor Compressor
1 2
TK1 TK2
Oil
TK5
Header
SV3A
SV3B
SV
TC1 TC2 TCJ
Cooling
Control
SV3A
High-pressure gas refrigerant
Control
SV3B
Control
SV3C
Condensed liquid refrigerant
Control
SV3D
( 28 HP system described in the example of (16 HP + 12 HP))
Follower unit (MMY-MAP1206HT*)
TO
TG1
PMV1
TG2
TL1
Check
Joint
Pressure sensor
TS3
(low pressure)
FP
Fusible
Plug
Liquid tank
Sub cool
heat exchanger
PMV4
TL3
Check joint
TC1 TC2 TCJ
Cooling
Evaporative gas refrigerant (Low pressure)
Low-pressure circuit (Refrigerant recovery line)
− 61 −
Fan
M
Fan motor
Right side
Main heat exchanger
Left side
Main heat exchanger
TE1
SV
SV52
Check Joint
Pressure sensor
(high pressure)
SV2
SV3D
SV
Oil
Separator
SV
SV41 SV42
SV3C
SV SV
TD1 TD2
TK4
HPS HPS
圧縮機
１
(ｲﾝﾊﾞｰﾀ)
Compressor Compressor
1 2
TK1 TK2
Oil
TK5
Header
SV3A
SV3B
SV
TC1 TC2 TCJ
Cooling
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TO
4-Way valve
Check
Joint
TS1
Pressure sensor
(low pressure)
Accumulator
TC1
Cooling