12
Installation and Operations Manual
Electrical Connections
WARNINGS:
The electrical connections must only be completed by a
qualified electrician;
A power supply other than the type specified may
seriously damage the system;
Separate as much as possible the probes and digital input
signal cables from the cables carrying inductive loads
and power cables to avoid possible electromagnetic
disturbance. Never lay power cables (including the
electrical cables) and probe signal cables in the same
conduits. Do not install the probe cables in the immediate
vicinity of power devices (contactors, circuit breakers or
similar);
Reduce the path of the probe and sensor cables as much
as possible, and avoid spiral paths that enclose power
devices. The probes must be connected using shielded
cables (minimum cross-section of each wire: 0.5 mm
2
);
Avoid direct contact with internal electronic components;
Connection errors (and connections other than those
indicated in this manual) may involve danger to the safety
of the users and cause faults on the instruments and the
components connected;
Fit the unit with all the electromechanical safety devices
required to guarantee correct operation and the complete
safety of the user.
CONTROLLER WIRING
Display
BUT. NO. FUNCTION
NORMAL OPERATION
START
UP
ON
OFF
flash
1
compressor
on
off
call
on
2
fan
on
off
call
on
3
defrost
on
off
call
on
4
auxiliary
output
(AUX)
output
active
output
not
active
–
on
5
clock (RTC)
RTC
available,
enabled
(tEN=1)
and at
least
one time
band has
been set)
RTC not
available
or not
enabled
(tEN=0)
or no
time
band set
on (if the
clock is
fitted)
6
alarm
alarm in
progress
no
alarm in
progress
–
on
7
digits
three digits with decimal point and range
-199 to 999. See parameters /4, /5, /6 for
the type of probe displayed, values in
°C/°F and decimal point
3.
C
on
tr
ollers
