Troubleshooting - Husqvarna DC 5500 Operator's Manual

Troubleshooting

WARNING! Most accidents involving
!
machines occur during trouble shooting,
service and maintenance as staff have to
locate themselves within the machine's risk
area. Prevent accidents by being alert and
by planning and preparing the work.
The engine should be switched off during
operations described in this chapter unless
otherwise stated.
All checks involving electric components
should only be performed by a licensed
electrician.
Problem
The machine will not run
The machine makes a low
humming sound when switched to
ON
The machine will only run in one
direction
The machine is blowing instead of
sucking when on a different power
source
The machine will run but there is
not power at the accessory power
outlet
The machine does not have much
suction
The machine is blowing dust out
the exhaust
*If large ammounts of dust is present in the secondary filter housing this indicates a problem with the primary filters.
14 –
English
TROUBLESHOOTING
Possible Cause
The machine has no incomming or
outgoing power.
Damaged cables.
Phase error. Only two phases
present. Switch off machine
immediately to aviod motor burn-
out.
Dust in the motor impellers.
Burned out motor.
Problem with the FWD/REV relay
mechanism.
Problem with a contactor.
Problem with the phase relay or
only one active contactor.
Unit not correctly connected.
No power at the accessory power
outlet.
Secondary filters blocked with
dust.
Dust flap not sealing correctly.
Secondary filters not properly
installed.
Secondary filters need replacing.
One of the primary filters has
come loose.
Holes or perforations in the
primary filters.
Possible action
Check that the power cable is connected and the
machine turned on.
Have a licensed electrician check the presence
of power at the top of the left side contactor. If no
power at the contactors, test for presence of
power at the power source.
Contact a licensed electrician.
Contact a licensed electrician.
Contact a licensed electrician.
Contact your service agent.
Contact a licensed electrician.
Contact a licensed electrician.
Unplug the machine and have a licensed
electricial change L1 and L3 on the motor and
test for suction to confirm faild phase relay.
Check that the unit is correctly connected and
properly powered up. (Eg. safety breaker and
emergency stop are in the correct position on the
grinder.)
Contact a licensed electrician.
Clean or replace filters.
Adjust flap in the bottom of collection cone to
proper closing. If the flap is not functioning the
filters will be blocked by dust sucks.
Ensure the filters are fitted correctly.
Replace filters.*
Ensure the filters are fitted correctly.
Small holes can be repaired/patched using
silicone sealant.