Differential,
To set or verify the Differential,
Factory preset temperature control code settings, as follows:
A. Press and hold MENU until the display changes to flashing SP.
B.Press up and down (arrows) repeatedly until the desired function is displayed.
C.Press MENU to display the function’s current value.
D.Press up and down (arrows) until the desired value is displayed.
E.Press MENU to save the new value. The display returns to the sensor temperature.
F.If no setup entry is made for 30 seconds, the control reverts to the temperature display.
Any saved control settings are
Check Procedure
WARNING
Line voltage is present inside control. Contact with line voltage can cause serious injury or death.
If the control system does not function properly, verify that the control is wired and set up properly. If the problem persists, use the following procedures to determine the cause of the problem
IMPORTANT:
Follow these troubleshooting procedures in the order presented. Do not skip any of the steps in the procedures.
1.Check for proper voltage to the control.
A.Remove the cover by loosening the four cover screws.
B.Use an AC voltmeter to check the voltage between the common and 120V or 240V terminals.
C.The voltage must be between 102 and 132 volts for 120V applications; 177 and 264 volts for 208/230V applications.
D.If the voltage reading is not within the required range, check the power source and input power wires for problems.
2. Fault Codes
If the LCD displays an alarm or fault code (SF or EE):
Fault Code | Definition | Solution |
SF flashing | Open temperature | See Step 3. Cycle |
alternately with | sensor or sensor wiring | power to reset control. |
OP |
|
|
|
|
|
SF flashing | Shorted temperature | See Step 3. Cycle |
alternately with | sensor or sensor wiring | power to reset control |
SH |
|
|
|
|
|
EE | Program failure | Reset the control by |
|
| pressing MENU. If |
|
| problem persists, |
|
| replace the control. |
|
|
|
3. Check for proper operation.
IMPORTANT:
Perform Steps 1 and 2 before performing these steps: A. Disconnect the load from the output relay
terminals.
B.Reconnect the sensor leads and supply power to the control.
C.Replace the cover.
D.Check the control settings for proper values.
E.Press and hold MENU until SP appears.
F.Press up and down (arrows) to change the set point temperature above and below the sensor temperature until the relay energizes and de- energizes.
G.If the output relay does not perform as indicated, replace the control.
H.If proper operation of the control is verified, reconnect the load.
