(847) 526-2407 Fax (847) 526-4456 (800) 526-7887
PROGRAMMING
The banner heading “Delta-Therm Corp Heat Trace CTL” is
displayed after applying power to the control panel. After the
banner heading is displayed the LED screen will display the
temperature as detected by the sensor and the control panel
setpoint temperature.
If the keypad is locked-out, move the red dipswitch on the
inside cover into the enable position.
FACTORY DEFAULT SETTINGS:
Setpoint Temperature = 40°F
With sensor dry continue: 2 hrs.
Temperature cannot be set lower than 20°F.
PROGRAMMING SETPOINT TEMPERATURE AND
COUNTDOWN TIMER
There are three dual purpose selector push-buttons: “EN-
TER/MENU”, “YES/arrow pointed up” (referred to as “YES/
up”), and “RETURN/arrow pointed down” buttons (referred to
as “RETURN/down”). The parameters can be accessed in
the following order:
1. To access parameters: Press the “ENTER/MENU”
button for up to 4 seconds and the LED screen will
display: “Set-up & reset”. Release button and wait for the
“Setpoint=40F“ message to display.
2. Press the “YES/up” arrow button to raise the setpoint
temperature. Press the “RETURN/down” arrow button to
Display does not turn on - Check 24 vac or vdc voltage at terminals
- Check connector on display
- Check connector wiring
- Check for damage
Keypad does not respond - Check enable/disable switch
- Check connector wiring
Sensor is dry though display says wet or sen-
sor is wet though display says dry
- Check sensor wiring/splices
- Replace sensor
Air temperature is different than shown on
display
- Sensor in direct sunlight
- Sensor is showing slab temperature
- Sensor is in contact with warm object
- Incompatible sensors used
- Temperature accuracy is less below 30°F
Sensor wire fail shown on display - Check splices and wire for damage
- Replace sensor
DTC-24 does not activate power panel - Check wiring
- Check power panel is operational
- DTC-24 control contacts are dry, to be used
as a single pole switch
RID control is not shown on display - Only shown when DTC-24 control is not
controlling the power panel
System operates after snow is removed - Reduce countdown time appropriately
lower the setpoint temperature.
3. When the LED screen displays your setpoint tempera-
ture press the “ENTER/MENU” button and “With sensor
dry continue: 2hrs.” will display.
4. To enter the countdown time: After the “With sensor dry
continue: 2hrs.” is displayed you can change the count
down timer setting from 0 hours to 24 hours. Press “YES/
up” arrow button to raise the count down timer up to 24
hrs. Press the “RETURN/down” arrow button to lower the
count down timer down to 0 hrs. Press “ENTER/MENU”
button to accept the new time duration.
5. The LED screen will display “System Reset?”. Press the
“RETURN/down” arrow button to save the settings and
return to automatic mode, or press “YES/up” to reset the
melting system.
LED SCREEN ALARM DISPLAYS AND RESETTING
ALARMS
The “Sensor wire fail” message will display if either of the
blue or black sensor wires are open, the sensor heater fails,
or the red and green sensor wires are shorted. Please refer
to Section 4.3 Trouble shooting and technical support.
LOCKING THE KEYPAD
A red dipswitch, labeled enabled/disabled input, is located on
the inside of the enclosure door. Move the dipswitch into the
left position to enable the keypad. Move the dipswitch into the
right position to disable the keypad.
TROUBLE-SHOOTING
DELTA-THERM Corporation, 6711 Sands Rd Suite A, Crystal Lake, IL
60014
C_DTC24_1803_DS
