Emergency Operation (Heating Operation Under Header Outdoor Unit Backup Scenario) - Toshiba MMY-MAP0804HT8-E Service Manual

4-5. Emergency Operation (Heating Operation under
Header Outdoor Unit Backup Scenario)
Leakage from PMV:
Liquid-side service valve
= Full closure
PMV1
PMV2
PMV4
TL
Liquid tank
Gas-side service valve
= Full closure
PMV
TC2
TCJ
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Header unit (MMY-MAP1604*)
FM
TE1
TE2
4-Way valve
Pressure sensor
(high pressure)
SV6
SV
SV
SV2
SV3D
O.S.
SV
SV41
SV
SV
SV42
SV3C
TD2
TD1
HPS HPS
HPS
TK4
Compressor Compressor Compressor
1 2
TK2
TK1 TK3
TK5
SV3E
SV3F
SV
SV3A
SV3B
SV
Balance pipe
Liquid pipe
Gas pipe
Balance pipe packed valve
= Full opening
Gas pipe
Liquid pipe
PMV
TC1
TC2
TCJ
High-pressure gas or condensate liquid refrigerant
Evaporative gas refrigerant (low-pressure gas)
Normal refrigerant line
Refrigerant recovery line
Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication
line is connected. All other outdoor units are called "follower units".
manuals search engine
Set Up as Temporary
Header Unit during
Emergency Operation
Failure
TO
PMV1
PMV
PMV
TS1
Pressure sensor
TL
(low pressure)
Accumulator
SV
Liquid tank
SV43
TD3
3
PMV
TC1
TC2
TCJ
Indoor unit
68
Follower unit (MMY-MAP1604*)
FM
TE1
TE2
4-Way valve
Pressure sensor
(high pressure)
SV6
SV
SV
SV2
SV3D
O.S.
SV
SV41
SV
SV
SV42
SV3C
TD1 TD2
HPS HPS
HPS
TK4
Compressor Compressor Compressor
1 2
TK2
TK1
TK3
TK5
SV3E
SV3F
SV
SV3A
SV3B
SV
PMV
TC1
TC2
TCJ
(The diagram shows a 32 HP system
(16 HP + 16 HP) as an example.)
TO
TS1
Pressure sensor
(low pressure)
Accumulator
SV
SV43
TD3
3
TC1