Troubleshooting - Husqvarna DC5500 Operator's Manual

Troubleshooting

Whilst every measure has been undertaken by the
manufacturer to ensure smooth reliable operation of
the machine, sometimes problems can arise.
The following possible problems may arise:
1. The machine will not run.
Ensure power connected to machine is on. If ma
chine still will not run, remove cover from control
box and test for presence of power supply at top of
left side contactor. If no power at contactors, test
power supply at power source. If power supply is ok
at source but there is no supply at contactors in con
trol box, check connections inside accessory power
point. These checks should only be performed by a
licensed electrician)
2. The machine makes a low humming sound when
switched to ON.
This indicates there are only two-phases of power
supply at the motor. Switch off machine immediately
to avoid motor burn-out. Have an electrician check
the machine to determine the cause of the missing
phase. If all three-phases are ok at motor then there
is a strong possibility the motor is faulty.
3. The machine will only run in one direction.
This indicates a problem with either the FWD/REV
switch mechanism or one of the contactors. Have
an electrician test the machine.
4. The machine will run but there is not power at
the accessory power point.
Check connections inside accessory power point.
5. The machine does not have much suction.
(A) Inspect inside secondary fi lter housing
and make sure secondary fi lters are not blocked
with dust. If blocked up with dust, remove and clean
fi lters by either tapping out or using compressed air.
IMPORTANT!
A respirator should be worn at all times when
performing fi lter cleaning activities.
If large amounts of dust present in secondary fi lter
housing, this indicates a problem with the primary
fi lters. Usually this means there is a hole in one or
more of the primary fi lters or one of the primary
fi lters has come loose.
Check primary fi lters for small holes or perforations.
Small holes can be repaired/patched using silicone
sealant.
Troubleshooting
(B) Make sure fl ap in bottom of collection cone
is closing properly and creating a seal.
If this fl ap is not functioning properly, machine will
tend to suck up dust bag when switched on.
6. The machine is blowing dust out the exhaust.
(A) Normally this means the secondary fi lters
are not installed properly and dust is bypassing
them. Ensure the seals on the ends of the second
ary fi lters opposite the secondary fi lter housing door
are creating a proper seal. This can be viewed by
looking down the fi lter link hose coupling.
(B) Secondary fi lters may need replacing.
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