Wiring Diagram: Compressor Unit - Daikin VRV IV RKXYQ5T8Y1B Series Installation And Operation Manual

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
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
h
d
S1NPL
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 Oil separator
l Heat exchanger
M1C Compressor
M1F~M3F Fan motor
RKXYQ5T8 + RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1A – 2020.10
A
R1T
Y1E
f
B
Y1S
R3T S1NPH
k
S1PH
f
i
R7T
R21T
M1C
j
3D104510-1
R1T (A) Thermistor (air)
R2T (A) Thermistor (gas)
R3T (A) Thermistor (coil)
R21T (B) Thermistor (discharge)
R3T (B) Thermistor (suction accumulator)
R5T (B) Thermistor (liquid)
R6T (B) Thermistor (subcool heat exchanger gas)
R7T (B) Thermistor (suction compressor)
S1NPH High pressure sensor
S1NPL Low pressure sensor
S1PH High pressure switch
Y1E, Y2E Electronic expansion valve
Y1S Solenoid valve (4‑way valve)
Heating
Cooling
20.2

Wiring diagram: Compressor unit

The wiring diagram is delivered with the unit, located on the switch
box cover.
Symbols:
X1M Main terminal
Earth wiring
15
Wire number 15
Field wire
Field cable
**
/12.2
Connection ** continues on page 12 column 2
1
Several wiring possibilities
Option
Not mounted in switch box
Wiring depending on model
PCB
Legend for wiring diagram 5 HP:
A1P Printed circuit board (main)
A2P Printed circuit board (inverter)
BS* Push button (A1P)
C* Capacitor (A2P)
DS1 DIP switch (A1P)
F1U, F2U Fuse (T 31.5 A / 250 V) (A1P)
F3U, F5U Fuse (T 6.3 A / 250 V) (A1P)
H*P LED (service monitor orange) (A1P)
HAP Running LED (service monitor green) (A*P)
K1M Magnetic contactor (A2P)
K1R Magnetic relay (A*P)
L1R Reactor
M1C Motor (compressor)
M1F Motor (fan)
PS Switching power supply (A2P)
Q1DI Earth leakage circuit breaker (field supply)
R* Resistor (A2P)
R2T Thermistor (discharge)
R3T Thermistor (suction accumulator)
R4T Thermistor (subcool heat exchanger gas)
R5T Thermistor (suction compressor)
R7T Thermistor (liquid)
R10T Thermistor (fin)
S1NPL Low pressure sensor
S1NPH High pressure sensor
S1PH High pressure switch
20 Technical data
Installation and operation manual
43