Effer DMU 2000 - Page 53

Electronic device DMU2000 - DMU3000 - DMU3000 PLUS
Electronic device DMU2000 - DMU3000 - DMU3000 PLUS
THE POWER OF PERFORMANCE
53
4
7
1
3
2
L) The warning light 1 flashes quickly,
the warning lights 2, 3, 4, and 7 are lighted up permanently
and a continuous acoustic alarm is emitted Biiiiiiiip
CAUSE
The DMU receives a not allowed, anomalous pressure value relating to jib cylinder.
! FAILURE ANALYSIS
If the computer is connected to crane (tools sensor diagnostics DMU hardware) the error
state is displayed:
- “1” appears next to: “pressure sensors disconnected”
CHECK
Check that the error state disappears and a pressure value of about 135 appears on computer when
carrying out the electric by-pass on transducer connecting cable, as outlined in Chapter 17 (This check
is equivalent to connecting a new transducer electrically only, without inserting it into cylinder, and
you should read a pressure value of 0 bar). The pressure transducer is damaged.
SOLUTION
Replace the pressure transducer.
! FAILURE ANALYSIS
If the computer is connected to crane (tools sensor diagnostics DMU hardware) the error
state is displayed:
- “1” appears next to: “jib pressure sensor disconnected”
The pressure value displayed on the computer is 523 bar.