HHC 903-10 and SHC 10 CDT Control Special Programming

  1. Turn power switch OFF and press and hold the Program button until “SP" displays, followed by the software version.

  2. Press the Program button when “°F” or “°C” displays, use the Up and Down arrow buttons to toggle the temperature reading from Fahrenheit to Celsius.

  3. Press and release the Program button and “int” displays.

  4. Press and hold the Up or Down arrow buttons and display counts down, “in-3, in-2, in-1”. When “int SYS” displays, release the Up or Down arrow button and the initialization is complete. The temperature and timers are now programmed to factory presets.

  5. Press and release the Program button and “CAL” displays, followed by the probe temperature, inside the unit.

  6. Use the Up and Down arrow buttons to set the displayed temperature to match the actual temperature inside the unit.

  7. Press and release the Program button twice and “P= L or U” displays. “P=L” means Locked and the setpoint temperature and timers CANNOT be programmed. “P=U” means Unlocked and the setpoint temperature and timers CAN be programmed. Use the Up and Down arrow buttons to toggle the display from “P=L” to “P=U”.

  8. Press and release the Program button and “OP” displays. Use the Up and Down arrow buttons to toggle the outputs ON & OFF. When the outputs are ON, the HEAT ON LED should come on and “8888” displays, indicating the outputs are working correctly.

  9. Press and hold the Program button to exit Special Program Mode and all modes will now be set.