Emergency Operation (Single Heating Operation At Backup Of The Header Unit) - Toshiba MMY-MAP1006FT8(J)P-E Service Manual

4-8. Emergency operation (Single heating operation at backup of the header unit)

Outdoor header unit (MMY-MAP1806FT*)
Trouble
When PMV leaked, service
valve at liquid side = Close fully
SV52
SV52
SV
PMV1
SV12
SV
PMV4
TE2
SV
SV
SV5
SV
TL1
SV6
Fusible
plug
FP
SV3D
SV
Liquid tank
SV41
SV
SV14
Check joint
SV3E
（Liquid pipe）
PMV TCS
SVD
SVDD
TC2 TCJ
Heating
Trouble header outdoor unit
4-Way valve ON
SV4(n) ON
SV51 OFF
SV52 OFF
SV6 Control
SV11 ON
SV12 OFF
SV14 OFF Outdoor Fan
(*1) SV4(n) of stopped compressor (n) = ON
(*2) SV14 of stopped outdoor unit = OFF
(*3) In defrost mode, PMV4 and PMV FS also open.
The outdoor unit which communication line between indoor and outdoor is connected is the "Header unit".
Other outdoor units are called "Follower units".
Fan Fan
FM FM
Fan motor Fan motor
Right side
TO
Main heat exchanger
Right side sub heat exchanger 2
Right side sub heat exchanger 1
Left side
Main heat exchanger
TE1
Left side sub heat exchanger 2
Left side sub heat exchanger 1
SV11
Check joint (High-pressure)
High-pressure sensor
Accumlator
SV2
SV
Oil
separator
SV42
SV3C
SV
TD2
TD1
TK4
High
High pressure
pressure SW
SW
Comp1 Comp2
TK1 TK2
Oil header
TK5
SV3A
SV3B SV
Balance pipe
Liquid pipe
Discharge gas pipe
Suction gas pipe
Suction gas service valve, dischage pipe service valve = Close full
TCS
PMV
SVS
SVD
SVSS
SVDD
TC1 TC2 TCJ
Heating
SV3A OFF 4-Way valve
SV3B ON SV4(n)
SV3C OFF SV51
SV3D OFF SV52
SV3E ON SV6
PMV1 Close SV11
PMV4 Close SV12
OFF SV14
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
( 32 HP system described in the example of ( 18HP + 14HP ))
Outdoor follower unit (MMY-MAP1406FT*)
Temporal set center unit in
emergency operation
SV52
SV
PMV1
PMV4
TE2
4-way
valve
TS1
TL1
Low-pressure sensor
Check joint
可溶栓
(Low-pressure)
FP
TS2
Liquid tank
(SV14)
Check joint
（Liquid pipe）
TCS
PMV
SVS
SVD
SVSS
SVDD
TC1 TC2 TCJ
Stop
Temporal header outdoor unit
ON SV3A Control
OFF(*1) SV3B Control
OFF SV3C Control
OFF SV3D Control
Control SV3E ON
ON PMV1 Control
OFF PMV4 Close(*3)
ON(*2) Outdoor Fan Control
− 65 −
Fan
FM
Fan motor
Right side
Main heat exchanger
Right side sub heat exchanger
Left side
Main heat exchanger
TE1
Left side sub heat exchanger
SV
SV11
SV
SV5
SV
SV6
Check joint (High-pressure)
High-pressure sensor
SV2
SV3D
SV
Oil
SV
separator
SV41 SV42
SV3C
SV SV
TD1 TD2
TK4
Comp1 Comp2
TK1 TK2
Oil header
SV3E
TK5
SV3A
SV SV3B
TCS
PMV
SVS
SVD
SVSS SVSS
SVDD
TC1 TC2 TCJ
Stop
FS unit / Indoor unit
Heating thermo ON
SVD
SVS OFF
SVDD OFF
SVSS OFF
PMV FS Close(*3)
PMV indoor Control
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
TO
4-way
valve
TS1
Low-pressure sensor
Check joint
(Low-pressure)
TS2
Accumlator
0
SVS
TC1
ON