3-25
Check
joint
Strainer
(Indoor unit 1)
Air heat
exchanger
at indoor side
TA
(Suction
sensor)
Pressure
sensor
TC2
TC1
(Indoor unit 2)
(Indoor unit 3)
Packed
valve
(balancing
pipe)
Packed
valve
(liquid
side)
Service
valve
(gas side)
Packed
valve
(balancing
pipe)
Packed
valve
(liquid
side)
Service
valve
(gas side)
Packed
valve
(balancing
pipe)
Packed
valve
(liquid
side)
Service
valve
(gas side)
Check
joint
Strainer
Air heat
exchanger
at indoor side
TA
(Suction
sensor)
Pressure
sensor
TC2
TC1
Check
joint
Strainer
Air heat
exchanger
at indoor side
TA
(Suction
sensor)
Pressure
sensor
TC2
TC1
Packed
valve
(balancing
pipe)
Packed
valve
(liquid
side)
Service
valve
(gas side)
Packed
valve
(balancing
pipe)
Packed
valve
(liquid
side)
Service
valve
(gas side)
(Solid line) High-pressure gas or compressed liquid refrigerant
(Dotted line) Evaporating gas refrigerant (Low-pressure gas)
Unit 2 (Fixed-speed)
Unit 3 (Fixed-speed)
Unit 4 (Fixed-speed)
Server
Compressor
M
HP
Propeller fan
Fan motor
Sensor
(TE1)
Pulse motor valve A
(PMV 1 + PMV 2)
Pulse motor valve B
(Cooling bypass)
(PMV 3)
Sensor
(TK3)
Sensor
(TK2)
Sensor
(TK1)
Sensor
(TS)
Sensor
(TD1)
Sensor
(TD2)
High-pressure
sensor
Low-pressure
sensor
Check joint
Check
joint
Strainer
Strainer
Oil
separator
Liquid
tank
Capillary
Capillary
Capillary
Capillary
Capillary
Solenoid valve
(SV3A)
Solenoid
valve
(SV3B)
Check valve
Check valve
Check valve
Check
valve
Check
valve
Check
valve
Compressor
case oil
removal valve
High-pressure SW
Solenoid valve
(SV42)
Solenoid valve
(SV2)
4-Way valve
Solenoid valve
(SV3C)
Accumulator
(Right side)
Air heat exchanger at outdoor side
(Left side)
Air heat exchanger at outdoor side
Oil tank
HP
High-pressure
SW
In
v
e
rter
Fix
ed-speed
Compressor
M
HP
Propeller fan
Fan motor
Sensor
(TE1)
Capillary
Pulse motor
valve A
(PMV 1 + PMV 2)
Pulse motor valve B
(Cooling bypass)
(PMV 3)
Sensor
(TK3)
Sensor
(TK2)
Sensor
(TK1)
Sensor
(TS)
Sensor
(TD1)
Sensor (TD2)
High-pressure
sensor
Low-pressure
sensor
Check joint
Check
joint
Strainer
Strainer
Oil
separator
Liquid
tank
Capillary
Capillary
Capillary
Capillary
Capillary
Solenoid valve
(SV3A)
OFF ® ON
Solenoid
valve
(SV3B)
Check valve
Check
valve
Check
valve
Check valve
Check
valve
Check
valve
Check
valve
Compressor
case oil
removal valve
High-pressure SW
Solenoid
valve
(SV41)
Solenoid
valve
(SV42)
Solenoid valve
(SV2)
4-Way valve
Solenoid valve
(SV3C)
Accumulator
(Right side)
Air heat exchanger at outdoor side
(Left side)
Air heat exchanger at outdoor side
Oil tank
HP
High-pressure
SW
Fix
ed-speed
Fix
ed-speed
Fully close the valves 10 minutes
after the operation has started
Service valve fully opned at balancing pipe.
Service valve fully closed at liquid side.
Fully close the valves of balancing pipe.
OFF ON
OFF ON
Center unit (Inverter)
Terminal unit (Fixed-speed)
OFF ON
Failure
*
*
*
They are not provided to the Cooling Only model.
Strainer
Strainer
Check
valve
Strainer
Check
valve
Strainer
Dryer
Str
a
iner
Dryer
Str
a
iner
Strainer
Strainer
3-4-4.
Reco
ver
y of Refrig
erant in F
ailed Outdoor Unit
(Normal outdoor unit reco
ver
s refrig
erant)