User manual

EN
MWE820, 860, 890 Troubleshooting
13
12 Troubleshooting
The device indicates no function.
The voltage supply cable (black/blue and brown wires) is not connected or is
incorrectly connected.
➤ Check the connections.
The plugs for the sensors are not connected or are not properly plugged into the
control electronics.
➤ Check the plugs, and make sure they lock into place.
A long tone sounds (approx. 3 seconds) after switching on the ignition
One or more sensors are defective or no longer connected to the control electron-
ics. The loudspeaker indicates the faulty sensor by the number of beeps after the
long beep: for example three beeps for sensor 3.
➤ Check the plugs and make sure they lock into place.
➤ Replace the defective sensor(s).
A
Device indicates obstacles incorrectly.
False alarms may have the following causes:
• For example dirt or frost on the sensors
➤ Clean the sensors.
• The sensors were incorrectly installed.
➤ Adjust the direction or height of the sensors (fig. 3).
• The sensors have contact with the chassis.
➤ Disconnect the sensors from the chassis.
Objects on the vehicle (e. g. spare wheel) lead to false alarms.
➤ Set the system so that fixed objects are no longer displayed (see chapter “Setting
the system” on page 9).
NOTICE!
The system no longer works reliably if one or more sensors are faulty.
MWE820-860-890-IO-16s.book Seite 13 Freitag, 26. August 2016 9:19 21