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WARNING
Line voltage is present inside control. Contact
with line voltage can cause serious injury or
death.
Differential, Anti-Short Cycle Delay,
Temperature Offset, or Sensor Failure Operation
To set or verify the Differential, Anti-Short Cycle
Delay, Temperature Offset or Sensor Failure Operation
use the following method:
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 non-volatile and remain
in the control’s memory during power interruptions.
Check Procedure
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
alternately with
OP
Open temperature
sensor or sensor wiring
See Step 3. Cycle
power to reset control.
SF flashing
alternately with
SH
Shorted temperature
sensor or sensor wiring
See Step 3. Cycle
power to reset control
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.