Mainly Cooling Mode (Operating Cooling Function Mainly, Collective Operation Of Cooling And Heating Operation) - Carrier MMY-MAP0724FT9UL Service Manual

5-4. Mainly cooling mode (Operating cooling function mainly, collective operation of
cooling and heating operation)
Outdoor header unit (MMY-MAP0964FT
PMV1 PMV2
PMV4
TE1
TE2
SV
SV
SV5
SV
TL
SV6
Fusible
plug
FP
SV3D SV
Liquid
tank
SV41 SV
TD1
Check
joint
(Liquid
pipe)
TC2 TCJ
Outdoor Unit
4-Way valve ON
SV4(n)
SV5 OFF
Control
SV6
SV11
ON
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".
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
SV11
Check joint SV6
( High pressure)
High pressure
sensor
Fusible
plug
SV2
SV
Oil
separator
High SV42
pressure High
High
SV
SW pressure
pressure
SW
SW
TD2
TK4
Comp.
Comp.
Comp.
3
2
1
(Inverter) (Inverter)
(Inverter)
TK3
TK1 TK2
Oil header
TK5
SV3F
SV
SV SV3B
Balance pipe
Liquid pipe
Dischage gas pipe
Suction gas pipe
TC1
TC2 TCJ
Cooling
Control
SV3A
Control
SV3B
Control
SV3C
Control
SV3D
SV3E ON
Control
SV3F
Outdoor fan
Control
(14 Ton system described in the example of (8 Ton + 6 Ton))
∗
UL) Outdoor follower unit (MMY-MAP0724FT
PMV1 PMV2
PMV4
TE2
4-way
valve
Low
TS1 pressure
sensor
Check
TL
joint
(Low
TS2
pressure)
Fusible
FP
plug
FP
Liquid
Accumulator
tank
SV43
SV
TD3
Check
joint
(Liquid
pipe)
TC1 TC2 TCJ
Cooling Stop
FS unit / indoor unit
Heating thermo ON Heating thermo OFF
SVD OFF SVD
ON
SVS
SVS
OFF
SVDD SVDD
SVSS
SVSS ON
PMV Control PMV
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
– 55 –
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
SV5
SV
Check joint SV6
SV6
( High pressure)
High pressure sensor
SV
Oil
separator
SV3D SV
High
pressure
High
SV41 SV
SW
pressure
SW
TD1 TD2
TK4
Comp. Comp.
1 2
(Inverter) (Inverter)
TK1 TK2
Oil header
TK5
SV SV3B
TC2 TCJ
TC1
Stop
ON OFF
SVD
OFF
SVS OFF
OFF
OFF
SVDD
SVSS
OFF ON
OFF PMV Close
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
∗
UL)
Fan
TO
4-way
valve
Low
TS1 pressure
sensor
Check
joint
(Low
TS2
pressure)
Fusible
FP
plug
SV2
Accumulator
SV42
SV
TC1
Heating