The green LED on the front panel illuminates when the SPDT output relay is energized. See Figure 1.
- LED On = Output Relay energized and the LC contact is closed to the LNO contact
- LED Off = Output Relay de-energized and the LC contact is open to the LNO contact
Parameter code | Parameter description (menu) | Range of usable values | Factory default value 1 |
---|---|---|---|
Un | Temperature Units (Advanced only) | ºF or ºC | ºF |
OFF | Relay Off Temperature (Basic, Advanced, and Restricted) |
-40ºF to 212ºF (-40ºC to 100ºC) |
25ºF |
On | Relay On Temperature (Basic and Advanced) |
-40ºF to 212ºF (-40ºC to 100ºC) |
30ºF |
ASd | Anti-Short Cycle Delay (Basic and Advanced) | 0 minutes to 12 minutes | 1 minute |
tSb | Temperature Setback (Advanced only) |
-50ºF to 50ºF (-30ºC to 30ºC) |
0ºF |
So | Sensor Offset Adjustment (Advanced only) |
-5ºF to 5ºF (-3ºC to 3ºC) |
0ºF |
HtS | High Temperature Stop (Advanced only) |
-40ºF to 212ºF (-40ºC to 100ºC) |
212ºF |
LtS | Low Temperature Stop (Advanced only) |
-40ºF to 212ºF (-40ºC to 100ºC) |
-40ºF |
SF | Sensor Failure Action (Basic and Advanced) | 0 = output relay de-energized 1 = output relay energized |
1 output relay energized |
bLL | LCD Backlight Brightness Level Adjustment (Advanced only) | 0 to 10; 0 = backlight off, 10 = brightest backlight setting |
10 (brightest backlight) |
1 The default
values for general application A421 models are shown. OEM
A421 models may have different default values.