12.9 EXTERN
• The red LED is flashing.
• The buzzer and the alarm symbol are on.
• Display text: EXTERN.
Cause Remedy
Flooding outside the tank. The
alarm is related to the external
level switch connected to the
controller.
Find the source of the flooding and eliminate the problem.
12.10 BATT
• The red LED is flashing.
• The buzzer and the alarm symbol are on.
• Display text: BATT.
Cause Remedy
The battery is discharged. Replace the battery.
Use a non-rechargeable battery.
Multilift MD1, MDV | Fault finding the product| 42
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