Technical data

1100 Series DAD and MWD Reference Manual 65
Troubleshooting and Test Functions 3
Open Cover
The top foam has been removed.
The sensor on the detector main board detects when the top foam is in place.
If the foam is removed, the fan is switched off, and the error message is
generated.
Probable Causes
• The top foam was removed during operation.
• Foam not activating the sensor.
Suggested Actions
✔ Replace the top foam.
✔ Exchange the foam.