Troubleshooting - National Flooring Equipment 3474 HEPA Instruction Manual

The machine is designed and manufactured for a sever environment and tasks, but the user
must note that the machine must be protected from knocks and blows. Filter, seals, attachments,
and connections are carefully adapted and selected with regard to the operators work
environment. Therefore, the operator and service personnel must treat the machine with the care
in order to work correctly for many years.
Problem
Motor does not start
Motor stops immediately after
starting
Motor runs but there is no
suction
Motor runs but suction is poor
Dust blows from motor
Abnormal noise

TROUBLESHOOTING

Possible Cause
1. No power
2. Cable defective
3. Switch defective
1. Wrong fuse
1. Hose not connected
2. Hose blocked
3. No plastic bag
1. Hose in the bag
2. Filter blocked
3. Top cover loose
4. Sealing defective
1. Filter loose or defective
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Possible Remedy
1. Connect the machine
2. Change
3. Change
1. Connect to correct fuse
1. Connect hose
2. Clean hose
3. Fit plastic bag
1. Change hose
2. a) Purge Vac
b) Change Filter
3. Adjust
4. Change current seal
1. Adjust or change
1. Order service