6
6. Audible alarm activated - No boom movements
A) You have a light leg. Check level and Limit switch on outriggers
7. Slew will not operate in either direction with DC motor turning
A) Check that appropriate control station has been selected,
B) Check that machine is on level ground. Slew will not operate if machine is out of
level.
C) Check for obstructions
D) Check that you have not reach the slew stop. 2002 machine specifications will only
slew +/-355 deg from the stowed position. Earlier machine would slew +/- 450 deg
from the stowed position.
8. Loss of movement on Mains powered machines or I.C. engine powered machines
A) Check dump valve. To enable movement the dump valve must pull in to stop oil
going to tank
B) Check oil pressure.
C) Check pump and coupling
9. If Mains motor / I.C. engine stalls when trying to operate machine
A) Check relief valve setting
10. If Mains motor stalls when operating machine
A) Check for voltage drop.
B) Use shorter extension lead
C) DO NOT RUN MACHINE - Motor will fail if voltage reading on motor terminals are
below 10% of motor rating when motor is running under load.
11. RCD on mains powered machines keeps tripping
A) Check for water ingress in terminal boxes.
B) Check motor Start & Run capacitors.
12. 0.5A fuse on control circuit keeps popping (Mains Powered Machines) .
A) Check coil on selector valve and dump valve for cracks/signs of water damage.
13. Burnt out mains isolating transformer (Mains Powered Machines)
A) Check fuse.
B) Check coil on selector valve and dump valve for cracks/signs of water damage.
FAULT FINDING
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