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20 Technical data
Main code
Sub code
20
Technical data
▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
Business Portal (authentication required).
20.1
Piping diagram: Compressor unit
and heat exchanger unit
5 HP
M2F
M1F
R3T
l
R2T
f
a
b
R7T
f
R4T
g
Y3E
c
f
h
d
e
f
i
A
Heat exchanger unit
B
Compressor unit
a
Stop valve (gas) (circuit 2: to indoor units)
b
Stop valve (liquid) (circuit 2: to indoor units)
c
Stop valve (liquid) (circuit 1: to heat exchanger unit)
d
Stop valve (gas) (circuit 1: to heat exchanger unit)
e
Service port (refrigerant charge)
f
Filter
g
Subcool heat exchanger
h
Pressure regulating valve
i
Capillary tube
j
Accumulator
k
Compressor accumulator
Installation and operation manual
42
Cause
▪ Auto address malfunction (inconsistency)
▪ Mismatch
of
compressor
exchanger unit.
▪ The stop valves of the compressor unit are left
closed.
▪ The piping and wiring of the specified indoor unit
or heat exchanger unit are not connected
correctly to the compressor unit.
A
R1T
Y1E
f
B
Y1S
m
R3T
S1NPH
S1PH
S1NPL
R5T
R2T
k
j
M1C
3D110524-1
▪ Check
if
matches with powered unit amount (by monitor
unit
and
heat
mode) or wait till initialisation is finished.
▪ Check
if
exchanger unit are compatible.
▪ Open the stop valves on both the gas and liquid
side.
▪ Confirm that the piping and wiring of the
specified indoor unit or heat exchanger unit are
connected correctly to the compressor unit.
l
Heat exchanger
m
Check valve
M1C
Compressor
M1F, M2F
Fan motor
R1T (A)
Thermistor (air)
R2T (A)
Thermistor (gas)
R3T (A)
Thermistor (coil)
R2T (B)
Thermistor (discharge)
R3T (B)
Thermistor (suction accumulator)
R4T (B)
Thermistor (subcool heat exchanger gas)
R5T (B)
Thermistor (suction compressor)
R7T (B)
Thermistor (liquid)
S1NPH
High pressure sensor
S1NPL
Low pressure sensor
S1PH
High pressure switch
Y1E, Y3E
Electronic expansion valve
Y1S
Solenoid valve (4‑way valve)
Heating
Cooling
8 HP
M3F
M2F
M1F
R3T
l
R2T
f
a
b
R5T
f
R6T
g
Y2E
c
f
d
e
f
i
A
Heat exchanger unit
B
Compressor unit
a
Stop valve (gas) (circuit 2: to indoor units)
b
Stop valve (liquid) (circuit 2: to indoor units)
c
Stop valve (liquid) (circuit 1: to heat exchanger unit)
d
Stop valve (gas) (circuit 1: to heat exchanger unit)
e
Service port (refrigerant charge)
f
Filter
VRV IV compressor unit for indoor installation
Solution
transmission
wired
unit
amount
the
compressor
unit
and
A
R1T
Y1E
f
Y1S
R3T
S1NPH
S1PH
h
S1NPL
R7T
R21T
M1C
j
3D104510-1
RKXYQ5T8 + RKXYQ8T7Y1B
4P499900-1B – 2021.12
heat
B
k
f
i
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