Wiring Diagram: Outdoor Unit - Daikin LRMEQ3BY1 Installation And Operation Manual

k Double tube heat exchanger
l Propeller fan
m Sight glass
n Capillary tube
M1C Compressor
R1T Thermistor (air)
R2T Thermistor (discharge)
R3T Thermistor (suction)
9.3

Wiring diagram: Outdoor unit

The wiring diagram is delivered with the unit, located at the inside of
the service cover.
Symbols:
English
Symbols
X1M
15
** /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)
LRMEQ3+4BY1
Air-cooled refrigeration condensing unit
4P495373-1 – 2017.07
Translation
Symbols
Main terminal
Earth wiring
Wire number 15
Field wire
Field cable
Connection ** continues on page
12 column 2
Several wiring possibilities
Option
Not mounted in switch box
Wiring depending on model
PCB
R4T Thermistor (Liquid pipe)
R5T Thermistor (Subcool heat exchanger outlet)
R6T Thermistor (Subcool heat exchanger inlet)
S1NPH High pressure sensor
S1NPL Low pressure sensor
S1PH High pressure switch
Y1E Electronic expansion valve (Subcooling)
F5U (A1P) Fuse (T 6.3 A / 250 V)
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
9 Technical data
Installation and operation manual
27