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-specific 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 Configuration
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 Configuration
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 Configuration
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