Instructions for the installer, maintenance
technician and final user
42
© SandenVendo Europe SpA
6.2 Control Unit CAREL ir33
The electronic control unit CAREL ir33 regulates and controls the refrigerant system and
all its components: the compressor, the fans, the defrosting and is independent of the
control of the board SVE01, which control the electronics of the distributor.
On the front of the control unit are: 3 digits, 7 LED indicators that show the operating
conditions and 4 buttons.
6.2.1 Display
ICON
FUNCTION
DESCRIPTION
Normal operation
Start up
ON
OFF
BLINK
COMPRESSOR
ON when the compressor
starts. Flashes when the
activation of the compressor is
delayed by safety times.
Compressor on Compressor off
Awaiting
activation
FAN
ON when the fan starts.
Flashes when the activation of
the fan is prevented due to
external disabling or
procedures in progress.
Fan on
Fan off
Awaiting
activation
DEFROST
ON when the defrost is
activated. Flashes when the
activation of the defrost is
prevented due to external
disabling or procedures in
progress.
Defrost in
progress
Defrost not in
progress
Awaiting
activation
AUX
Flashes if the anti-sweat heater
function is active, ON when the
auxiliary output (1 and/or 2)
selected as AUX (or LIGHT in
firmware version 3.6) is
activated.
AUX auxiliary
output
active(version
3.6 light
auxiliary output
active)
AUX auxiliary
output not active
Anti-sweat heater
function active
ALLARM
ON following pre-activation of
the delayed external digital
input alarm. Flashes in the
event of alarms during normal
operation (e.g. high/low
temperature) or in the event of
alarms from an immediate or
delayed external digital input.
Delayed
external alarm
(before the time
„A7‟ elapses)
No alarm present
Alarms in norm.
operation (e.g.
High/low
temperature) or
immediate or
delayed alarm
from external
digital input
