Emergency Operation (Single Cooling Operation At Backup Of The Header Unit) - Toshiba MMY-MAP0806FT8P-TR Service Manual

4-7. Emergency operation (Single cooling operation at backup of the header unit)

Outdoor header unit (MMY-MAP1806FT*)
Trouble
When PMV leaked, service
valve at liquid side = Close fully
SV52
SV
PMV1
SV12
SV
TE1
PMV4
TE2
SV
SV11
SV
SV5
SV
TL1
SV6
Fusible
plug
FP
SV3D
SV
Liquid tank
SV41
SV
TD1
Comp1
SV14
Check joint
SV3E
（Liquid pipe）
Suction gas service valve, dischage pipe service valve = Close full
PMV
TCS
SVD
SVSS
SVDD
TC2 TCJ
Cooling
Trouble header outdoor unit
4-Way valve OFF
SV4(n) ON
SV51 ON
SV52 OFF
SV6 Control
SV11 OFF
SV12 OFF
SV14 OFF Outdoor Fan
(*1) SV4(n) of stopped compressor (n) = ON
(*2) 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 Fan motor FM 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
Left side sub heat exchanger 2
Left side sub heat exchanger 1
4-way
valve
TS1
Low-pressure sensor
Check joint
(Low-pressure)
Check joint (High-pressure)
TS2
High-pressure sensor
Accumlator
SV2
SV
Oil
separator
SV42
SV3C
SV
TD2
TK4
High
pressure
High
SW
pressure
SW
Comp2
TK1 TK2
Oil header
TK5
SV3A
SV3B SV
Balance pipe
Liquid pipe
Discharge gas pipe
Suction gas pipe
PMV TCS
SVS
SVS
SVD
SVSS
SVDD
TC1 TC2 TCJ
Cooling
SV3A OFF 4-Way valve
SV3B OFF 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 ))
Out door follower unit (MMY-MAP1406FT*)
Temporal set center unit in
emergency operation
SV52
SV
PMV1
PMV4
TE2
SV5
TL1
Fusible
plug
FP
Liquid tank
(SV14)
Check joint
（Liquid pipe）
PMV TCS
SVS
SVD
SVSS
SVDD
TC1 TC2 TCJ TC1
Cooling
Temporal header outdoor unit
OFF SV3A Control
OFF(*1) SV3B Control
ON SV3C Control
OFF SV3D Control
Control SV3E ON
OFF PMV1 Control
OFF PMV4 Close(*2)
OFF Outdoor Fan Control
− 69 −
Fan
FM
Fan motor
Right side
TO
Main heat exchanger
Right side sub heat exchanger
Left side
Main heat exchanger
TE1
Left side sub heat exchanger
SV
SV11
SV
SV
SV6
Check joint (High-pressure)
High-pressure sensor
Accumlator
SV2
SV3D
SV
Oil
SV
separator
SV41 SV42
SV3C
SV SV
TD1 TD2
TK4
Comp1 Comp2
TK1 TK2
Oil header
SV3E
TK5
0
SV3A
SV3B
SV
PMV TCS
SVS
SVD
SVSS
SVDD
TC2 TCJ TC1
Stop
FS unit / Indoor unit
Cooling thermo ON
SVD OFF
SVS ON
SVDD OFF
SVSS ON
PMV FS Close(*2)
PMV indoor Control
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
4-way
valve
TS1
Low-pressure sensor
Check joint
(Low-pressure)
TS2