Emergency Operation (All Heating Operation At Backup Of The Header Unit) - Carrier MMY-MAP0724FT9UL Service Manual

5-7. Emergency operation (All heating operation at backup of the header unit)

Outdoor header unit (MMY-MAP1204FT
Trouble
When PMV leaked, service
valve at liquid side = Close fully
PMV1 PMV2
PMV4
TE1
TE2
SV
SV
SV5
SV
TL
SV6
Fusible
plug
FP
SV
SV3D
Liquid
tank SV41
SV
TD1
Check
joint
(Liquid
pipe)
TC2 TCJ
Trouble header outdoor unit
4-Way valve ON
SV4(n) ON
SV5 OFF
Control
SV6
SV11 ON
SV14 OFF
PMV1, 2 Close Outdoor fan
Close
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
( High pressure)
High pressure
sensor
Fusible
SV2
plug
SV
Oil
separator
High SV42
pressure High
SV
SW pressure
High
SW
pressure
SW
TD2 TD3
Comp. Comp.
Comp.
2 3
1
(Inverter) (Inverter)
(Inverter)
TK1 TK3
TK2
Oil header
TK5
SV3F
SV
SV3B
SV
Balance pipe
Liquid pipe
Dischage gas pipe
Suction gas pipe
TC1
TC2 TCJ
Heating
SV3A OFF 4-Way valve
SV4(n)
SV3B ON
OFF SV5
SV3C
OFF
SV3D SV6
SV3E ON SV11
OFF SV14
SV3F
OFF PMV1, 2
PMV4
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
(20 Ton system described in the example of (10 Ton + 10 Ton))
∗
UL) Outdoor follower unit (MMY-MAP1204FT
Temporal set header unit in
emergency operation
PMV1 PMV2
PMV4
TE2
4-way
valve
SV5
Low
TS1
pressure
sensor
Check
TL
joint
(Low
TS2
pressure)
Fusible
FP
plug
FP
Liquid
Accumulator
tank
SV43
SV
Check
joint
(Liquid
pipe)
TC1 TC2 TCJ
Heating
Temporal header outdoor unit
Control
ON SV3A
Control
SV3B
OFF
SV3C Control
Control SV3D Control
ON
SV3E
SV3F Control
Control Outdoor fan Control
– 58 –
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
SV
SV
Check joint
SV6
( High pressure)
High pressure
sensor
SV2
SV
Oil
separator
SV
SV3D
SV41 High SV42
pressure High
SV SV
SW pressure
SW
TD1 TD2
Comp.
Comp.
2
1
(Inverter)
(Inverter)
TK1
TK2
Oil header
TK5
SV3F
SV
SV3B
SV
TC2 TCJ
TC1
Stop
Stop
FS unit / indoor unit
Cooling thermo ON
SVD ON
OFF
SVS
SVDD OFF
ON SVSS OFF
PMV Control
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
Accumulator
High
SV43
pressure
SV
SW
TD3
Comp.
3
(Inverter)
TK3
TC1
Stop
SVD OFF
SVS OFF
OFF
SVDD
SVSS ON
PMV Close