Daikin LRMEQ4BY1 Installer And User Manual page 27

6 Connect the wiring to the output signals terminal (X3M) as
follows:
C C1 W1 R P1 P2
a b c
a Caution signal
b Warning signal
c Run signal
d Operation signal
▪ Respect the following guidelines:
Output signal
Caution and Warning signal Connection recommended
Run signal
Operation signal
CAUTION
When connecting the power supply, the earth connection
must be made before the current-carrying connections are
established. When disconnecting the power supply, the
current-carrying connections must be separated before the
earth connection is. The length of the conductors between
the power supply stress relief and the terminal block itself
must be as such that the current-carrying wires are
tautened before the earth wire is in case the power supply
is pulled loose from the stress relief.
NOTICE
Never connect the power supply to terminal blocks X2M or
X3M. Otherwise the entire system may break down.
NOTICE
Output signals. The outdoor unit is provided with a
terminal (X3M) that can output 4 different signals. The
signal is 220~240 V AC. The maximum load for all signals
is 0.5 A. The unit outputs a signal in the following
situations:
▪ C/C1: caution signal – connection recommended –
when an error occurs that does not stop unit operation.
▪ C/W1: warning signal – connection recommended –
when an error occurs that causes unit operation to
stop.
▪ R/P2: run signal – connection optional – when the
compressor is running.
▪ P1/P2: operation signal – connection mandatory –
when the indoor unit solenoid valve is being controlled.
7 Connect the power supply as follows:
LRMEQ+LRLEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1A – 2018.09
d
Guideline
when system malfunctions
are likely to occur.
Connection optional.
Connection mandatory.
Connect the operation signal
to the solenoid valves that are
installed upstream of the
expansion valves of the
indoor unit. The outdoor unit
controls the solenoid valve
opening:
▪ During start-up, to prevent
liquid refrigerant
entering the compressor.
▪ During oil return operation.
See "6.8.2 Field wiring:
Overview" on page 24 for
more details.
L1 L2 L3
a
b
c
L1 L2 L3
a Earth leakage circuit breaker
b Fuse
c Power supply cable
NOTICE
Keep cables away from the left maintenance stop valve
and piping. The valve and piping can get very hot and
damage the cables.
8 Fix the cables with cable ties.
X1M
2×
a
from
b
2×
a Power supply (including earth)
b Output signals
c Remote operation switch, low-noise switch, transmission
9 Route the wiring through the frame and connect it to it.
Routing through
the frame
6 Installation
3N~ 50 Hz
380-415 V
X1M
N
X3M
X2M
1×
c
1
b
a
a Power supply cable and output signal
cables
b Remote operation switch cable, low-
noise switch cable, and transmission cable
Installer and user reference guide
2
b
a
27