Warning 77 — Twin-head pump communication fault

What does 77 mean?

The communication link between the two pump heads in a twin-head pump configuration has been disturbed or completely broken. This is a warning and does not activate the alarm relay.

• The second pump head is not powered on.
• The second pump head is not correctly connected to the power supply.
• Interruption of the communication link between the pump heads.

Click steps to track your progress.

1. 1

   Verify that the second pump head in the twin-head setup is powered on.

2. 2

   Check all electrical and communication cables connecting the two pump heads to ensure they are securely attached.

3. 3

   If the problem persists, try cycling the power to both pump heads at the main switch.

4. 4

   Consult the installation manual for proper twin-head pump wiring and setup.