9 About the system
Installation and operation manual
12
FXFQ20~125BVEB
VRV system air conditioner
4P540926-1B – 2019.01
BS*
Pushbutton ON/OFF, operation
switch
BZ, H*C
Buzzer
C*
Capacitor
AC*, CN*, E*, HA*, HE*, HL*,
HN*, HR*, MR*_A, MR*_B, S*,
U, V, W, X*A, K*R_*
Connection, connector
D*, V*D
Diode
DB*
Diode bridge
DS*
Dip switch
E*H
Heater
FU*, F*U, (for characteristics,
refer to PCB inside your unit)
Fuse
FG*
Connector (frame ground)
H*
Harness
H*P, LED*, V*L
Pilot lamp, light emitting diode
HAP
Light emitting diode (service
monitor green)
HIGH VOLTAGE
High voltage
IES
Intelligent eye sensor
IPM*
Intelligent power module
K*R, KCR, KFR, KHuR, K*M
Magnetic relay
L
Live
L*
Coil
L*R
Reactor
M*
Stepper motor
M*C
Compressor motor
M*F
Fan motor
M*P
Drain pump motor
M*S
Swing motor
MR*, MRCW*, MRM*, MRN*
Magnetic relay
N
Neutral
n=*, N=*
Number of passes through ferrite
core
PAM
Pulse-amplitude modulation
PCB*
Printed circuit board
PM*
Power module
PS
Switching power supply
PTC*
Thermistor PTC
Q*
Insulated gate bipolar transistor
(IGBT)
Q*DI
Earth leak circuit breaker
Q*L
Overload protector
Q*M
Thermo switch
R*
Resistor
R*T
Thermistor
RC
Receiver
S*C
Limit switch
S*L
Float switch
S*NPH
Pressure sensor (high)
S*NPL
Pressure sensor (low)
S*PH, HPS*
Pressure switch (high)
S*PL
Pressure switch (low)
S*T
Thermostat
S*RH
Humidity sensor
S*W, SW*
Operation switch
SA*, F1S
Surge arrestor
SR*, WLU
Signal receiver
SS*
Selector switch
SHEET METAL
Terminal strip fixed plate
T*R
Transformer
TC, TRC
Transmitter
V*, R*V
Varistor
V*R
Diode bridge
WRC
Wireless remote controller
X*
Terminal
X*M
Terminal strip (block)
Y*E
Electronic expansion valve coil
Y*R, Y*S
Reversing solenoid valve coil
Z*C
Ferrite core
ZF, Z*F
Noise filter
For the user
9
About the system
The indoor unit of this split system air conditioner can be used for
heating/cooling applications.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments, food, plants, animals, or
works of art.
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.
10
User interface
CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are
dangerous to touch and appliance problems may
happen. For checking and adjusting the internal parts,
contact your dealer.
This operation manual will give a non-exhaustive overview of the
main functions of the system.
For more information about the user interface, see the operation
manual of the installed user interface.
