Carel ir33 Handbook page 3

POWER OFF When the instruments is switched off the display shows the label OFF and
all internal relays are disabled (not energized)
POWER ON
When the controller is switched on a special procedure tests the display
and the keypad. The display is completely ON for 2 seconds
Three segments "---" on the display are visualized for 2 seconds and then
the controller becomes operative
Compressor icons flashes and the compressor activation is delayed by
safety times
SET CAVITY
To display or to set the temperature, proceeds as follows:
TEMPERATURE
Keep SET button pressed for more than 1 second. The instruments
displays the temperature value
Increase or decrease the set point using UP/DOWN buttons, until reaching
the desired value
Press SET button again to confirm the new value
FREQUENT USE Press Prg/mute button more than 5 seconds the instruments shows the
PARAMETER code of the first adjustable parameter (type "F") – if an alarm is active,
(TYPE F) pressing this button, the buzzer is muted first.
FREQUENTLY USE PARAMETER LIST: St, rd, rt, rH, rL, dI, dt1, dt2,
dP1, dP2, dd, d8, d/1, d/2, AL, AH, Ad, F1, Fd
CONFIGURATION Access to the configuration parameters is protected by password that
PARAMETER avoid unwanted modifications or access by unauthorized personel.
(TYPE C) Proceeds as follows:
Ver. 1.1
Eng
Press Prg/Mute and Set buttons together for more than 3
1.
seconds; display shows a flashing numerical code "0" that indicates
the password prompt
Press UP button to set the password – CAREL thermoregulators are
2.
provided with password set to 11 (the code of the password allows
access to the configuration parameters)
Confirm by pressing the Set button to enter in the programming
3.
mode and scroll up/down the operating parameters list
Display shows the code of the first adjustable type "C" parameter
4.
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Updated:
17/03/2010
Pag.3/12