Starting or stopping a Defrost Cycle using the SdF parameter - PENN Controls - A421ABD - A421AED - Electronic Temperature Control - A421 Series Electronic Temperature Control

To start or stop a Defrost Cycle using the SdF parameter, choose from the following options.

• Select a Start/Stop Defrost Cycle (SdF) parameter value of 1.
• Or, change the SdF value to 0 (zero) during a dFt to stop a defrost cycle and return the control to normal On/Off operation. See Figure 1.