Refrigerant Recovery (During Pump-Down Operation) Of The Troubled Outdoor Unit) (In Case Of Trouble Of Follower Unit) - Carrier MMY-MAP0724FT9UL Service Manual

5-8. Refrigerant recovery (during pump-down operation) of the troubled outdoor unit)
(In case of trouble of follower unit)
Outdoor header unit (MMY-MAP0964FT
PMV1 PMV2
PMV4
TE1
TE2
SV
SV
SV5
SV
TL
SV6
Fusible
plug
FP
SV3D SV
Liquid
SV41
tank
SV
TD1
Check
joint
(Liquid
pipe)
TC2 TCJ
Header outdoor unit
4-Way valve OFF
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".
Fan
FM
Fan motor
Right side
Main
heat exchanger
Right side sub heat exchanger
Left side
Main
heat exchanger
Left side sub heat exchanger
SV11
Check joint
( 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)
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
4-Way valve
SV3A
Control SV4(n)
SV3B
SV5
SV3C Control
SV3D Control SV6
SV3E ON SV11
SV3F Control SV14
PMV1, 2
Outdoor fan Control
PMV4
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
(14 Ton system described in the example of (8 Ton + 6 Ton))
∗
UL) Outdoor follower unit (MMY-MAP0724FT
Trouble
TO
PMV1 PMV2
PMV4
TE2
4-way
valve
Low
TS1
pressure
sensor
Check
TL
joint
(Low
TS2
pressure)
Fusible
plug
FP
FP
Liquid
Accumulator
tank
SV43
SV
TD3
Check
joint
(Liquid
pipe)
TC1 TC2 TCJ
Cooling
Trouble outdoor unit
Control
OFF SV3A
Control
SV3B
ON
Control
SV3C
Control Control
SV3D
OFF SV3E
Control
OFF SV3F
Outdoor fan
Control Control
– 59 –
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
( High pressure)
High pressure sensor
SV2
SV
Oil
separator
SV3D
SV
High
SV41
pressure
SV
SW High
pressure
SW
TD1 TD2
TK4
Comp.
Comp.
2
1
(Inverter)
(Inverter)
TK1 TK2
Oil header
TK5
SV3B
SV
Balance pipe packed valve = Open full
Low pressure gas pipe service valve = Open full
10 minutes after operation = Close full
Liquid side service valve, dischage pipe service valve = Close full
TC2 TCJ
TC1
Cooling
FS unit / indoor unit
Cooling thermo ON
OFF
SVD
SVS ON
SVDD OFF
ON SVSS ON
PMV Control
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
∗
UL)
Fan
TO
Low
TS1
pressure
sensor
Check joint
(Low pressure)
TS2
Fusible
FP
plug
Accumulator
TC1
Cooling