920-010-05 (11-04)

Activated

Carbon

Post-filter

Consumer

Troubleshooting

Guide

The activated carbon filter must be replaced when it is no longer effective in eliminating odors. The life of the carbon filter will depend on the concentration of odors and fumes in the air passing through the air cleaner. Under normal operating conditions, the carbon filter should last from three to six months. The carbon filter must be in place for the air cleaner to operate.

If you experience problems with the operation of your air cleaner, please:

Make sure electronic cell is clean, dry, and properly installed.

Make sure pre-filter and carbon filter are both properly installed.

Make sure the top cover is properly snapped in place.

Check fan motor and indicator lamp on all speed settings starting with low.

If your air cleaner still has any of the following problems, proceed step by step as shown below until no further action needs to be taken.

PROBLEM 1 - Fan Off, Lamp Off

Make sure the supply cord is plugged into a standard household receptacle.

Make sure there is voltage to the receptacle by using any other electric device.

Make sure the carbon filter is in place.

Make sure the top access cover is properly in place in order to actuate the interlock switch. The interlock switch is provided for consumer safety and should never be bypassed.

No further corrective actions should be taken by the consumer. Return unit to Regional Authorized Warranty Station for repair (see page 10.)

PROBLEM 2 - Fan On, Lamp Off

Allow the electronic cell to dry completely before reinstalling it into the unit.

Unplug the unit and check electronic cell to see if any of the collector plates are touching. Gently straighten and evenly space the plates.

Check electronic cell to see if any of the ionizer wires are broken. See page 8 for location. If broken wires are observed, no further corrective actions should be taken by the consumer. Return unit to Regional C-90A Authorized Warranty Station for repair.

PROBLEM 3 - Fan Off, Lamp On

This condition represents an unserviceable failure of the air cleaner. Return to Regional Authorized Warranty Station for repair.

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Nilfisk-ALTO C-90A Activated Carbon Post-filter Consumer, Guide, Problem 1 Fan Off, Lamp Off, Problem 2 Fan On, Lamp Off