5-4. Emergent Operation
(Heating Operation when Center Outdoor Backup)
(MMY-MAP1001H)
Failure
TE1
1
*
PMV1
PMV2
Pd sensor
TL
SV3D
Liquid
tank
SV41
HP
3
2
*
*
Strainer
Strainer
PMV
TC2
TCJ
High-pressure gas or condensate liquid refrigerant
Evaporative gas refrigerant (Low-pressure gas)
NOTE
An outdoor unit which is connected with indoor/outdoor communication
lines is the "Header unit", and the other unit is called "Follower unit".
Header unit
FM
TO
4-Way valve
SV5
SV2
Ps sensor
OS
SV42
HP
SV3C
TD1
TD2
TK3
TK1
TK2
Oil tank
SV3E
TK4
SV3A
SV3B
Balance pipe
Liquid pipe
Gas pipe
Gas pipe
Liquid pipe
Strainer
Strainer
PMV
TC1
TC2
TCJ
Header unit set
temporarily in
emergent time
PMV1
PMV2
TS1
TL
SV3D
Liquid
tank
Accumulator
1
When liquid leaks from PMV, packed valve
*
at liquid side = Close fully
2 Gas pipe service valve = Close fully
*
3
Balance pipe packed valve = Open fully
*
Strainer
PMV
TC1
TC2
TCJ
Indoor unit
62
Follower unit
(MMY-MAP1001H)
FM
TE1
4-Way valve
SV5
SV2
Pd sensor
Ps sensor
OS
SV41
SV42
HP
HP
SV3C
TD1
TD2
TK3
TK1
TK2
Oil tank
SV3E
TK4
SV3A
SV3B
Strainer
Strainer
PMV
TC1
TC2
TCJ
(Example: 20HP system)
TO
TS1
Accumulator
Strainer
TC1