Controller Operation • 39
CONTROLLER OPERATION
Carel IR33+ Low Temp Reach-In Codes
Note: Carel Controller codes/factory set points listed in this manual are standard codes. For customer-specic information, please
see the Carel label on top of the electrical box cover on top of the case.
3 TO 5-DOOR LOW TEMP
Code Name
Factory
Set
LEVEL 1
St Set Point -10
rd Differential 6
AH High Temp Alarm 10
c1 Min Comp Time Starts 5
d/1 Defrost Probe Temp (actual)
dn Defrost Duration % 100
tc.y RTC Year -
tc.m RTC Month -
tc.d RTC Day of Month -
tc.u RTC Day of Week -
tc.h RTC Hour -
tc.m RTC Minute -
LEVEL 2
/A2 Probe 2 Conguration 2
c2 Min Comp OFF 1
c3 Min Comp ON 1
d0 Defrost Type 4
dd Drip Time 1
dl Defrost Interval 24
dP1 Defrost Duration 40
dt1 Defrost End Temp 50
AL Low Temp Alarm -20
F0 Fan Management 2
F1 Fan Start Temp 30
H0 Serial Address 1
H1 Function of Relay 4 10
td1.d Defrost Time Day 1 11
td1.h Defrost Time Hour 1 8
td1.m Defrost Time Minute 1 0
td2.d Defrost Time Day 2 0
td2.h Defrost Time Hour 2 0
td2.m Defrost Time Minute 2 0
65-1615 Rev B
3-DOOR IM BOTTOM-MOUNTED COIL
Code Name
Factory
Set
LEVEL 1
St Set Point 7
rd Differential 4
AH High Temp Alarm 25
c1 Min Time Between Starts 5
d/1 Defrost Probe Temp (actual)
dn Defrost Duration % 100
tc.y RTC Year -
tc.m RTC Month -
tc.d RTC Day of Month -
tc.u RTC Day of Week -
tc.h RTC Hour -
tc.m RTC Minute -
LEVEL 2
/A2 Probe 2 Conguration 2
Ad Low & High Alarm Delay 60
c2 Min Comp OFF 1
c3 Min Comp ON 1
d0 Defrost Type 4
dd Drip Time 1
dl Defrost Interval 12
dP1 Defrost Duration 40
dt1 Defrost End Temp 70
AL Low Temp Alarm -20
F0 Fan Management 2
F1 Fan Start Temp 30
H0 Serial Address 1
H1 Function of Relay 4 10
td1.d Defrost Time Day 1 11
td1.h Defrost Time Hour 1 8
td1.m Defrost Time Minute 1 0
td2.d Defrost Time Day 2 11
td2.h Defrost Time Hour 2 20
td2.m Defrost Time Minute 2 0
65-1460 Rev B
1 AND 2-DOOR LOW TEMP
Code Name
Factory
Set
LEVEL 1
St Set Point -10
rd Differential 6
AH High Temp Alarm 10
c1 Min Comp Time Starts 5
d/1 Defrost Probe Temp (actual)
dn Defrost Duration % 100
tc.y RTC Year -
tc.m RTC Month -
tc.d RTC Day of Month -
tc.u RTC Day of Week -
tc.h RTC Hour -
tc.m RTC Minute -
LEVEL 2
/A2 Probe 2 Conguration 2
Ad Low & High Alarm Delay 60
c2 Min Comp OFF 1
c3 Min Comp ON 1
d0 Defrost Type 4
dd Drip Time 3
dl Defrost Interval 24
dP1 Defrost Duration 30
dt1 Defrost End Temp 40
AL Low Temp Alarm -20
F0 Fan Management 2
F1 Fan Start Temp 30
H0 Serial Address 1
H1 Function of Relay 4 10
td1.d Defrost Time Day 1 11
td1.h Defrost Time Hour 1 8
td1.m Defrost Time Minute 1 0
td2.d Defrost Time Day 2 0
td2.h Defrost Time Hour 2 0
td2.m Defrost Time Minute 2 0
65-1616 Rev B