JCB P20BB-00: Error for short to ground or open load on heater relay of backflow line

The system has detected an error related to the heater relay of the backflow line, specifically a short to ground or an open load condition. This may affect the proper operation of the heater relay in the backflow line circuit.

1. 1

   The heater relay of the backflow line

2. 2

   The wiring and connections associated with the heater relay of the backflow line

3. 3

   The load connected to the heater relay of the backflow line

1. 1

   Inspect

   Inspect the heater relay of the backflow line for visible damage or wear.

2. 2

   Test

   Test the heater relay of the backflow line for proper operation using a multimeter.

3. 3

   Check

   Check the wiring and connections associated with the heater relay of the backflow line for continuity and proper insulation.

4. 4

   Verify

   Verify the load connected to the heater relay of the backflow line is functioning correctly and not causing an open load condition.