For The User; 10 About The System; System Layout - Daikin LRLEQ3BY1 Installation And Operation Manual

10 About the system

English
**
/12.2
1
Notes:
1 Symbols: see above.
2 Refer to the installation or service manual on how to use
BS1~BS4 push buttons and DS1‑1~DS1‑2 switches.
3 Do not operate the unit by short-circuiting protection device
S1PH.
4 The capacity of this contact is 220~240 V AC – 0.5 A (total of
caution output, warning output, run output, and operation
output).
5 The initial setting is "0" (OFF). To operate, set to
"1" (REMOTE) or "2" (ON).
6 To use the remote switch, use a voltage-free contact for
microcurrent (<1 mA - 12 V DC). For instructions on how to
use the remote switch, refer to the technical engineering data.
7 The initial state of SW1 is "open" (normal mode). To activate
low‑noise mode, close the contact.
Legend for wiring diagram LRMEQ3+4:
A1P Printed circuit board (main)
A2P Printed circuit board (inverter)
BS* (A1P) Push buttons (MODE, SET, RETURN, TEST, RESET)
C* (A2P) Capacitor
DS1 (A1P) DIP switch
E, E1 (A1P) Connector
F1U (A1P) Fuse (T 31.5 A / 500 V)
F1U (A2P) Fuse (T 5 A / 250 V)
F2U (A1P) Fuse (T 31.5 A / 500 V)
F3U Fuse (T 1.0 A / 250 V)
F3U (A1P) Fuse (T 6.3 A / 250 V)
F4U Fuse (T 1.0 A / 250 V)
F4U (A1P) Fuse (T 6.3 A / 250 V)
F5U (A1P) Fuse (T 6.3 A / 250 V)

For the user

10 About the system
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.
Installation and operation manual
30
Translation
Connection ** continues on page
12 column 2
Several wiring possibilities
Option
Not mounted in switch box
Wiring depending on model
PCB
HAP (A*P) Running LED (service monitor is green)
H*P (A1P) LED (service monitor is orange)
K1M (A2P) Magnetic contactor
K*R (A*P) Magnetic relay
L1R Reactor
L*A Connector
M1C Motor (compressor)
M1F Motor (fan) (upper)
M2F Motor (fan) (lower)
NA (A1P) Connector
P1, P2 Connector
(A2P)
PS (A2P) Power supply
Q1DI Earth leakage circuit breaker (field supply)
R1T Thermistor (air)
R2T Thermistor (M1C discharge)
R3T Thermistor (suction)
R4T Thermistor (liquid pipe)
R5T Thermistor (subcool heat exchanger outlet)
R6T Thermistor (subcool heat exchanger inlet)
R10T Thermistor (fin)
R* (A2P) Resistor
S1NPH Pressure sensor (high)
S1NPL Pressure sensor (low)
S1PH Pressure switch (high)
S1S Operation switch (REMOTE/OFF/ON)
SW1 Low‑noise mode switch
SW2 External operation switch
U, V, W Connector
(A2P)
V1R (A2P) IGBT power module
V2R, V3R Diode module
(A2P)
X*A PCB connector
X*M Terminal strip
X*Y Connector
Y1E Electronic expansion valve (subcool)
Z*C Noise filter (ferrite core)
Z*F (A1P) Noise filter
10.1

System layout

a b c
a Outdoor unit (ZEAS condensing unit)
b Refrigerant piping
c Indoor unit (Blower coil)
d
LRMEQ+LRLEQ3+4BY1
Air-cooled refrigeration condensing unit
4P545024-1 – 2018.09