CAREL® ir33 PLATFORM PROGRAMMABLE CONTROLLER FOR REFRIGERATED UNITS - PAGE 1 of 3
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Integrated Electronic
Microprocessor Controller
Programming The Instrument
To Modify Defrost, Differential and Other Parameters
1. Press & hold “Prg” & “SET” keys together for at least five (5) seconds; display
will flash “0,” representing password prompt.
2.
Press ▲ until password “22” is reached.
3. Press “SET” key to confirm password.
4. Press ▲ or ▼ to reach a category to
be modified.
5.
Press “SET” to modify selected parameter.
6.
Increase or decrease the value using
the ▲ or ▼ button respectively.
7. Press the “SET” key to temporarily save the
new value and return to the parameter display.
8. Press & hold the “Prg” key for 5 full seconds
to save changes. This will also mute the audible
alarm (buzzer) and deactivate the alarm relay.
Warning! Save Your Parameter Settings!
1.
To store the new parameter values, PRESS
and HOLD the “Prg” key for at least 5 seconds.
2. All modifications made to parameters will be lost
if you do NOT press a button within 60 seconds.
Should this “timeout” occur, normal operational
settings (prior to modifications being made) will
resume.
3. If the instrument is switched off before pressing the
“Prg” key, all modifications to parameters will be lost.
Set
▲
aux
Prg
mute
def
▼
Prg
mute
Set
Set
▼
Set
▲
aux
Prg
mute
How To Change Reading
From Fahrenheit (°F) To Celsius (°C)
1. Press and hold “Prg” and “SET” keys
together for at least 5 seconds; display will
show “0” (password prompt).
2. Press ▲ until password “22” is reached.
3. Confirm by pressing “SET” key.
4. Press ▲ or ▼ until reaching the
parameter “/ 5.”
5. Press “SET” to modify this selected parameter.
6. Press ▲ or ▼ to change value to
desired setting: “0” for Celsius (°C) or “1”
for Fahrenheit (°F).
7. Press “SET” key to temporarily save the new
value and return to the display of the parameter.
8. Press & hold “Prg” key for 5 full seconds to
save changes.
Note! All values will automatically
convert to new scale. No conversion is required.
Prg
mute
Set
Set
def
▼
▲
aux
Set
▲
aux
def
▼
Set
Prg
mute
To Activate / Deactivate Auxiliary Output
Press and hold the “aux” key for 1 second.
▲
aux
To Activate Manual Defrost
Press and hold “def” key for at least 5 seconds.
def
▼
To Reset Any Alarms With Manual Reset
Press and hold the “Prg” and “aux” key for
at least 1 second.
▲
aux
def
▼
▲
aux
def
Set
▲
aux
Prg
mute
▲
aux
This data derived from Carel® Controller Material:
ir33 +030220441 - rel. 2.0 - 01.05.2006.
User Manuals\Carel ir33 Platform Programmable Controller For
Refrig Units - Rev C Date: 06/22/2022
