Fisher PTTW-10-EC Series Engineering Manual page 20

See pictures P15-P20
13.1 Standard filter cleaning:
The filters should be cleaned every two weeks to
keep the air conditioner running efficiently.
How to proceed:
Disconnection the air conditioner from the electrical supply.
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Extract the filter grating (P15); on the same direction as the arrow. Remove the filter
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along the slot shown on P17. Proceed to wash them (do not use hot water) and only
when they are dry replace them in the same way.
ATTENTION:
Do not use the air conditioner without filters as it could seriously damage the air conditioner.
13.2 External cleaning:
Disconnect the air conditioner from the electrical supply.
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Wipe external surfaces clean with a damp cloth only.
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Do not use an abrasive cloth and/or solvents, as this may damage the surfaces.
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Do not use an excessively wet cloth or sponges, as water stagnation could damage the
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air conditioner and compromise safety.
12.3 Activated carbon filter
The unit includes activated carbon filter, which not only has the function of eliminating
suspended particles the standard filter has, but also eliminates smaller particles such as free
chlorine, odors, colors and toxic particles that are too small to filter out by using standard filter.
The activated carbon filter should be changed every three months. It is not possible to wash
or clean them.
12.4 Position of electrical heater
Electrical heater is positioned in the top of the machine, protected by the top grille. Do not try
to touch it when it is working.
THROUGH THE WALL UNIT
MAINTENANCE
19