13 About the system
Installer and user reference guide
46
RWEYQ8~1 RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1 – 2017.04
12.4
Wiring diagram: Outdoor unit
The wiring diagram is delivered with the unit, located at the inside of
the service cover.
Notes to go through before starting the unit
English
Translation
Notes to go through before
starting the unit
Notes to go through before
starting the unit
Symbols
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
1
Refer to the installation or service manual on how to use
BS1~BS3 push buttons, and DS1+DS2 DIP switches.
2
Do not operate the unit by short-circuiting protection device
S1PH.
3
For connection of indoor-outdoor F1-F2 transmission wiring,
and outdoor-outdoor F1-F2 transmission wiring, refer to the
service manual.
Position in switch box
English
Translation
Position in switch box
Position in switch box
Legend
A1P
Main PCB
A2P
Noise filter PCB
A3P
Inverter PCB
A4P
SUB PCB
A8P
Adapter PCB
A9P
*
Cool/heat selector PCB
BS* (A1P)
Push buttons (mode, set, return)
C* (A3P)
Capacitor
DS* (A1P)
DIP switch
E1HC
Crankcase heater
F1S (A2P)
Surge arrestor
F1U (A4P)
Fuse (T, 3.15 A, 250 V)
F401U (A2P)
Fuse (T, 6.3 A, 250 V)
F402U (A2P)
Fuse (T, 6.3 A, 250 V)
F403U (A2P)
Fuse (T, 6.3 A, 250 V)
F410U (A2P)
Fuse (T, 63 A, 600 V)
F411U (A2P)
Fuse (T, 63 A, 600 V)
F412U (A2P)
Fuse (T, 63 A, 600 V)
F*U (A1P)
Fuse (T, 3.15 A, 250 V)
HAP (A1P)
Running LED (service monitor – green)
K1M (A3P)
Magnetic contactor
K*R (A*P)
Magnetic relay
L*R
Reactor
M1C
Motor (compressor)
M*F
Motor (fan)
PS (A1P)
Power supply
Q1DI
#
Earth leakage circuit breaker
Q1RP (A1P)
Phase reversal detect circuit
R* (A3P)
Resistor
R*T
Thermistor
R*V (A2P)
Varistor
S1NPH
High pressure sensor
S1NPL
Low pressure sensor
S1PH
High pressure switch (discharge)
S1S
Air control switch
S2S
Cool/heat switch
S3S
Interlock switch
SEG* (A1P)
7-segment display
T1A
Leakage current detection sensor
V1R (A3P)
IGBT power module
V2R (A3P)
Diode module
X66A
Connector (remote switching cool/heat
selector)
X*A
PCB connector
X*M
Terminal strip
X*M (A*P)
Terminal strip on PCB
X*Y
Connector
Y*E
Electronic expansion valve
Y*S
Solenoid valve
Z*C
Noise filter (ferrite core)
Z*F
Noise filter
*
Optional
#
Field supply
For the user
13
About the system
The indoor unit part of VRV IV heat recovery system can be used for
heating/cooling applications. The type of indoor unit which can be
used depends on the outdoor units series.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.