Carel ir33 smart User manual

Updated:
17/03/2010
Ver. 1.1
Eng Pag.1/12
CAREL ir33
Quick reference Handbook

Updated:
17/03/2010
Ver. 1.1
Eng Pag.2/12
MAIN FEATURES OF THE INSTRUMENT
USER INTERFACE
1. ON/OFF switch button – UP button to increase temperature values
2. DOWN button to decrease values - Activates/deactivates the
manual defrost
3. SET temperature button
4. Prg/mute button
5. Malfunctioning or failure warning icon
6. High/Low temperature alarm icon
7. icon is ON when defrost process starts
8. icon is ON when compressor starts
9. icon is ON when evaporator fans starts
10. icon is ON when an auxiliary output is active

Updated:
17/03/2010
Ver. 1.1
Eng Pag.3/12
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
TEMPERATURE
To display or to set the temperature, proceeds as follows:
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
PARAMETER
(TYPE F)
Press Prg/mute button more than 5 seconds the instruments shows the
code of the first adjustable parameter (type “F”) – if an alarm is active,
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
PARAMETER
(TYPE C)
Access to the configuration parameters is protected by password that
avoid unwanted modifications or access by unauthorized personel.
Proceeds as follows:
1. Press Prg/Mute and Set buttons together for more than 3
seconds; display shows a flashing numerical code “0” that indicates
the password prompt
2. Press UP button to set the password – CAREL thermoregulators are
provided with password set to 11 (the code of the password allows
access to the configuration parameters)
3. Confirm by pressing the Set button to enter in the programming
mode and scroll up/down the operating parameters list
4. Display shows the code of the first adjustable type “C” parameter
/2

Updated:
17/03/2010
Ver. 1.1
Eng Pag.4/12
MANUAL
DEFROST
Manual defrost is activated or deactivated if DEF/DOWN button is keep
pressed more than 5 seconds.
When defrost starts display shows dFb (defrost begining)
Defrost’s warning icon is ON when defrost is active
Defrost can be interrupted simply by pressing again the DEF/DOWN
button more than 5 seconds. Display shows the message dFE (defrost
End)
MODIFYING THE
PARAMETERS
After having displayed the first operating parameter, either type C or type
F, it is necessary to procedes as follows:
1. Press UP/DOWN button until reaching the parameter to be
modified. When scrolling the list, an icon appears on the display
that indicates the category the parameter belongs to
2. Press SET button to display the parameter’s value
3. Increase or decrease its value using UP/DOWN button
4. Press again SET button to temporarily save the new value, closing
the parameter adjustment and return to the display of the
parameter code
Repeat the operations from point 1 to 4
STORING THE
NEW ASSIGNED
VALUES
To definitively store the new values of the modified parameters, procede
as follows:
1. Press the Prg/mute button more than 5 seconds
2. Display shows the label Pro
The controller step out the parameter setting procedure and the display
shows current temperature value.
RESET ANY
MODIFICATIONS All modifications made to the parameters, temporarily stored into the internally memory of the controller, can be cancelled and normal operation
resumed by not pressing any button for 60 second, thus allowing the
parameter setting session to expire due to timeout

Updated:
17/03/2010
Ver. 1.1
Eng Pag.5/12
HOW TO CHECK
CAVITY PROBE
TEMPERATURE
To check current temperature measured by a single installed probe,
proceeds as follow:
1. refers to the previous step how to get in the configuration
parameter session - type C parameter
2. scroll the configuration parameter list, by using UP/DOWN
buttons, until display shows the parameter /C1 (calibration or
offset for cavity probe)
3. press SET button
4. display shows the probe calibration value, used to correct the
temperature measured by the probe by means of an offset
5. Press again SET button
6. display shows the current temperature value measured by the
probe
7. press SET button to return to display of the parameter code /C1
HOW TO CHECK
EVAPORATOR
TEMPERATURE
Current evaporator probe temperature is available by means of the
parameter /C2 (calibration or offset for evaporator probe)
To check temperature value proceeds as previously indicated from step 1
to step 2, considering the configuration parameter /C2
HOW TO CHECK
CONDENSER
TEMPERATURE
If the condenser probe is installed it is possible to check condenser
temperature by means of the parameter /C3 (calibration or offset for
condenser probe)
To check temperature value proceeds as previously indicated from step 1
to step 2, considering the configuration parameter /C3
BE CAREFUL ⇒DO NOT ADJUST THE
CALIBRATION VALUE

Updated:
17/03/2010
Ver. 1.1
Eng Pag.6/12
TABLE OF OPERATING PARAMETERS
N° Code Range U.M. Description
TEMPERATURE PROBE MANAGEMENT PARAMETERS
1 /2 0...15 -- Measurement stability
2 /3 0...15 -- Probe display response
3 /4 0…100 -- Virtual probe
4 /5 0/1 Flag Selection °C or °F
5 /6 0/1 Flag Decimal point
6 /tl 1…6 -- Display on terminal
7 /tE 0...6 -- Display on external terminal
8 /P 0…2 -- Type of probe
9 /A2 0…3 -- Configuration probe 2
10 /A3 0…3 -- Configuration probe 3
11 /c1 -20…20 °C/°F (/10) Calibration probe 1
12 /c2 -20…20 °C/°F (/10) Calibration probe 2
13 /c3 -20…20 °C/°F (/10) Calibration probe 3
TEMPERATURE CONTROL PARAMETERS
14 St r1…r2 °C/°F set point temperature
15 rd 0.1…20 °C/°F Control delta
16 rn 0…60 °C/°F Dead band
17 rr 0.1…20 °C/°F Reverse differential for control with dead band
18 r1 -50...r2 °C/°F Minimum set point allowed
19 r2 r1…200 °C/°F Maximum set point allowed
20 r3 0...2 Flag Operating mode
21 r4 -20...20 °C/°F Automatic night-time set point variation
22 r5 0...1 °C/°F Enable temperature monitoring
23 rt 0...999 °C/°F Temperature monitoring interval
24 rH - °C/°F Maximum temperature read
25 rL - °C/°F Minimum temperature read
COMPRESSOR SAFETY TIME AND ACTIVATION PARAMETERS
26 c0 0...15 Minutes Compressor and fan delay on start-up
27 c1 0…15 Minutes Minimum time between two sequent compressor
starts
28 c2 0...15 Minutes Minimum compressor OFF time
29 c3 0...15 Minutes Minimum compressor ON time
30 c4 0…100 Minutes Duty setting
31 cc 0…15 Hours Continuous cycle duration
32 c6 0…15 Hours Alarm bypass after continuous cycle
33 c7 0...900 Seconds Maximum pump down time
34 c8 0...60 Seconds Compressor start delay after open PD valve

Updated:
17/03/2010
Ver. 1.1
Eng Pag.7/12
N° Code Range U.M. Description
35 c9 0...1 Flag Enable autostart function in PD
36 c10 0...1 Flag Select Pump down by time or pressure
37 c11 0...250 Seconds Second compressor delay
DEFROST MANAGEMENT PARAMETERS
38 d0 0...4 Flag Type of defrost
40 dI 0…250 Hours Interval between defrosts
41 dt1 -50…200 °C/°F End defrost temperature, evaporator
42 dt2 -50…200 °C/°F End defrost temperature, aux evap.
43 dtP 0...200 °C/°F Defrost end temperature when defrost has done
with compressor OFF and fans ON
44 dP1 1…250 Minutes Maximum defrost duration, evaporator
45 dP2 1…250 Minutes Maximum defrost duration, aux evap.
46 d3 0...250 Minutes Defrost start delay
47 d4 0/1 Flag Enable defrost on start-up
48 d5 0…250 Minutes Defrost delay on start-up
49 d6 0...2 -- Display on hold during defrost
50 dd 0…15 Minutes Dripping time after defrost
51 d8 0…15 Hours Alarm bypass after defrost
52 d8d 0…250 Hours Alarm bypass after door open
53 d9 0/1 Flag Defrost priority over compressor protectors
54 d/1 - °C/°F Defrost probe 1 read
55 d/2 - °C/°F Defrost probe 1 read
56 dC 0/1 Flag Time base (0=h/m;1=m/s)
57 d10 0...250 Hours Compressor running time for defrost
58 d11 -20...20 °C/°F Running time temperature for defrost
59 d12 0...3 -- Advanced defrost
60 dn 1...100 % Nominal defrost duration
61 dH 0...100 -- Proportional factor, variation in dI
ALARM MANAGEMENT PARAMETERS
62 A0 0.1…20.0 °C/°F Alarm (fan) differential
63 A1 0/1 Flag Relative or Absolute Alarm
64 AL -50…200 °C/°F Low temperature alarm threshold
65 AH -50…200 °C/°F High temperature alarm threshold
66 Ad 0…250 Minutes Low and high temperature signal delay
67 A4 0…15 Flag Digital input 1 configuration
68 A5 0…15 Flag Digital input 1 configuration
69 A6 0…100 Minutes Stop compressor from external alarm
70 A7 0…250 Minutes External alarm detection delay
71 A8 0/1 Flag Enable alarms ‘Ed1’ and ‘Ed2’

Updated:
17/03/2010
Ver. 1.1
Eng Pag.8/12
N° Code Range U.M. Description
72 Ac 0...200 °C/°F High condenser temperature alarm
73 AE 0.1...20 °C/°F High condenser temperature alarm differential
74 Acd 0…250 Minutes High condenser temperature alarm delay
75 AF 0…250 Seconds Light sensor OFF time
76 ALF -50...200 °C/°F Antifreeze alarm threshold
77 AdF 0…15 Minutes Antifreeze alarm delay
78 ACS -50...200 °C/°F Alarm Clean Setpoint
79 ACd 0.1...50 Minutes Alarm Clean differential
EVAPORATOR FAN MANAGEMENT PARAMETERS
81 F0 0...2 Flag Fan management
82 F1 -50...200 °C/°F Fan stop temperature
83 F2 0/1 Flag Fan OFF with compressor OFF
84 F3 0/1 Flag Fans in defrost
85 Fd 0…15 Minutes Fan OFF after dripping
86 F4 -50...200 °C/°F Condenser fan stop temperature
87 F5 0.1...20 °C/°F Condenser fan start differential
GENERAL CONFIGURATION PARAMETERS
88 H0 0…207 -- Serial address
89 H1 0...10 Flag Function of relay 4
90 H2 0...6 Flag Disable keypad/IR
91 H4 0/1 Flag Disable buzzer
92 H6 0...255 -- Lock keypad
93 H8 0/1 Flag Select activation of output with time band
94 H9 0/1 Flag Enable set point variation with time band
95 Hdh -50...200 °C/°F Anti-sweat heater offset
96 CCd 0...999 -- Clean Counter Days
97 Cd 0...999 -- Clean days
98 SAn 0...255 -- Service Alarms number
99 SAr 0...1 Flag Service Alarms counter reset San
100 CAn 0...255 -- Clean Alarm counter
101 CAr 0...1 Flag Clean Alarm counter reset
NOTE 1:
Above operating parameters are available for all range of CAREL thermoregulators. Particularly all green
highlighted parameters are available on new CAREL controller ir33 IRELF0HN245, currently installed on HD
cabinets and counters
NOTE 2:
Blu highlighted operating parameters listed above are not influential for the functioning of the appliance.

Updated:
17/03/2010
Ver. 1.1
Eng Pag.9/12
SERVICE ALLARMS AND SIGNALS
SERVICE ALARMS
SERVICE ALARMS DUE TO MALFUNCTIONING OR FAILURE PRODUCE A WARNING
SIGNALS ON THE DISPLAY BY MEAN OF THE SERVICE ICON
CAVITY PROBE
FAULT
In case of cavity probe faulty or malfunctioning display shows the error
signal rE and E0 (cavity probe S1 fault) alternately
The appliance works however and compressor starts are controlled by
time (15 mins is ON and 15 mins is OFF) until the fault is resolved. This
alarm signal is automatically restored when the faulty erased and the
probe replaced
During this time interval the service alarm icon flashes on display and an
acoustic signal is ENABLED
EVAPORATOR
PROBE FAULTY
In case of evaporator probe faulty or malfunctioning display shows an
error signal E1 (evaporator probe S2 fault).
This alarm signal is automatically restored when the faulty erased and
the probe replaced
During this time interval the service alarm icon flashes on display.
Acoustic signal is DISABLED
CONDENSER
PROBE FAULTY
(WHEN INSTALLED
ON BOARD)
In case of condenser probe faulty or malfunctioning display shows the
error signal SEr and E2 (condenser probe S3 fault) alternately
This alarm signal is automatically restored when the faulty erased and
the probe replaced
During this time interval the service alarm icon flashes on display.
Acoustic signal is DISABLED
CLEAN ALARM If a probe is set as the condenser probe, the condenser temperature can
be monitored to signal the high temperature alarm, due to obstruction or
fouling
In this case a warning signal is visualized and display shows the error
signal CLn and the temperature measured by the condenser probe
alternately
Service alarm icon is flashing and the acoustic signal DISABLED
The clean alarm is reset to zero by pressing the Prg/mute button and
the service alarm icon cancelled on display

Updated:
17/03/2010
Ver. 1.1
Eng Pag.10/12
TEMPERATURE ALARMS AND SIGNALS
TEMPERATURE
ALARMS
HIGH OR LOW TEMPERATURE ALARMS DUE TO MALFUNCTIONING OR
COMPONENTS FAILURE PRODUCE A WARNING SIGNALS ON THE
DISPLAY BY MEAN OF THE ALARM ICON.
LOW
TEMPERATURE
ALARM
In case of low cavity temperature, referred to the cavity probe, the
display shows a flashing error code LO.
Temperature alarm icon is flashing and the acoustic signal ACTIVE.
This alarm is automatically reset when cavity temperature increase over
the minimum temperature threshold, depending from the parameter AL
HIGH
TEMPERATURE
ALARM
In case of high cavity temperature, referred to the cavity probe, the
display shows a flashing error code HI.
Temperature alarm icon is flashing and the acoustic signal ACTIVE.
This alarm is automatically reset when cavity temperature decrease
under the maximum temperature threshold, depending from the
parameter AH
CONDENSER FAN
ALARM
In case of condenser fan faulty or malfunctioning display shows a
flashing error code SEr
Temperature alarm icon is flashing and the acoustic signal ACTIVE
Pressing Prg/mute button the buzzer is DISABLED but the alarm signal
is still active and shown on the display