Invalid tone with display momentarily off — Failed to turn load on in Service Test Mode

What does Invalid tone with display off mean?

When attempting to command a load (like a pump or valve) 'on' in Service Test Mode, the display turns off momentarily and an invalid tone sounds. This indicates that the load cannot be activated.

• Too many loads are commanded 'on' simultaneously.
• Conditions required to actuate the load (e.g., water level) are not met.
• An internal component issue with the load itself or its control circuit.

Click steps to track your progress.

1. 1

   Review the number of loads currently active and toggle some off if exceeding operational limits.

2. 2

   Ensure all prerequisites for the desired load (e.g., proper water level for a valve) are met.

3. 3

   Exit Service Test Mode and try to activate the load during a normal cycle to see if the issue persists.