Toshiba SMMS-u MMY-MUP0801HT8 Quick Reference page 117

(1) Refrigerant Flow (Automatic emergency heating)
Header Unit (MMY-MUP2401HT8-C)
Trouble
Fan Fan
M M
Fan motor Fan motor
PMV1 TO
Left side Left side Left side Right side Right side Right side
TL1
Main heat exchanger Main heat exchanger Main heat exchanger Main heat exchanger Main heat exchanger Main heat exchanger
TE1 TG1
Leakage from PMV
TG2
Liquid-side service
valve = Full closure
TG3
Left side Left side Left side Right side Right side Right side
Sub heat exchanger
Sub heat exchanger Sub heat exchanger Sub heat exchanger Sub heat exchanger Sub heat exchanger
PMV2
TE2 TE3
PMV3
TL2
4-way valve
TS3
High-pressure
TS1
sensor
Low-pressure
sensor
Accumulator
SV3D
SV
SV3F
High- High-
Leakage from PMV
SV SV
pressure pressure
Liquid-side service
switch switch
valve = Full closure
SV41 SV42
TD1 TD2
Subcool
Heat Exchanger
PMV4
TL3
TK1 TK2
Check joint
Gas-side service valve
= Full open
TC2 TCJ TC1 TC2 TCJ TC1
Heating Heating
Trouble header outdoor unit
4-way valve OFF SV3D OFF
PMV1 CLOSE SV3F OFF
PMV2 CLOSE SV4(n) OFF
PMV3 CLOSE Outdoor fan OFF
PMV4 CLOSE
Set Up as Temporary
Header Unit during
Follower Unit (MMY-MUP1401HT8-C)
Emergency Operation
Fan
M
Fan motor
TO
PMV1
TG1
Main heat exchanger Main heat exchanger Main heat exchanger
TE1
TL1
TG2
Sub heat exchanger Sub heat exchanger Sub heat exchanger
TE2
PMV2
TL2
4-way valve
TS3
High-pressure
TS1
sensor
Low-pressure
sensor
Accumulator
SV3D
SV
SV SV3F
High-
pressure
SV41
switch
Subcool
Heat Exchanger
TD1
PMV4
TL3
Check joint
TK1
TC2 TCJ TC1 TC2 TCJ TC1
Heating Heating
Temporal header outdoor unit
4-way valve OFF SV3D Control
PMV1 Control SV3F Control
PMV2 Control SV4(n) Control
PMV3 Control Outdoor fan Control
PMV4 Control
High-pressure gas refrigerant
Condensate liquid refrigerant
Evaporative gas refrigerant (Low pressure)
Low-pressure circuit (Refrigerant recover line)
(38 HP system described in the example of (24 HP + 14 HP))
(2) Refrigerant Flow (Manual emergency heating)
Header Unit (MMY-MUP2401HT8-C)
Fan
M M
Fan motor Fan motor
TO
PMV1
Left side Left side Left side Right side Right side Right side
TL1
Main heat exchanger Main heat exchanger Main heat exchanger Main heat exchanger Main heat exchanger Main heat exchanger
TE1
Leakage from PMV
TG2
Liquid-side service
valve = Full closure
TG3
Left side Left side Left side Right side Right side Right side
Sub heat exchanger Sub heat exchanger Sub heat exchanger Sub heat exchanger Sub heat exchanger Sub heat exchanger
PMV2
TE2 TE3
PMV3
TL2
4-way valve
TS3
High-pressure TS1
sensor
Accumulator
SV3D
SV
SV3F
High- High-
Leakage from PMV
SV SV
pressure pressure
Liquid-side service
switch switch
valve = Full closure
SV41 SV42
TD1 TD2
Subcool
Heat Exchanger
PMV4
TL3
TK1 TK2
Check joint
Gas-side service valve
= Full closure
TC2 TCJ TC1 TC2 TCJ
Heating Heating
Trouble header outdoor unit
4-way valve OFF SV3D OFF
PMV1 CLOSE SV3F OFF
PMV2 CLOSE SV4(n) OFF
PMV3 CLOSE Outdoor fan OFF
PMV4 CLOSE
10
Follower Unit (MMY-MUP1401HT8-C)
Trouble
Fan
Fan
M
Fan motor
TO
PMV1
TG1
Main heat exchanger Main heat exchanger Main heat exchanger
TG1 TE1
TL1
TG2
Sub heat exchanger Sub heat exchanger Sub heat exchanger
PMV2 TE2
TL2
TS3
High-pressure
sensor
Low-pressure
sensor
Accumulator
SV3D
SV
SV
High-
pressure
SV41
switch
Subcool
Heat Exchanger
TD1
PMV4
TL3
Check joint
TK1
TC1 TC2 TCJ TC1 TC2 TCJ
Heating
Temporal header outdoor unit
4-way valve OFF SV3D Control
PMV1 Control SV3F Control
PMV2 Control SV4(n) Control
PMV3 Control Outdoor fan Control
PMV4 Control
High-pressure gas refrigerant
Condensate liquid refrigerant
Evaporative gas refrigerant (Low pressure)
Low-pressure circuit (Refrigerant recover line)
(38 HP system described in the example of (24 HP + 14 HP))
Set Up as Temporary
Header Unit during
Emergency Operation
4-way valve
TS1
Low-pressure
sensor
SV3F
TC1
Heating