Service Guide
Preventative maintenance
Preventive maintenance has to be performed in order to:
• Continue operation in specied range
• Avoid malfunctions
• Avoid inecient operation
• Maximize the unit’s lifetime
The factory warranty is only valid if documented preventive maintenance has been
performed within time interval of:
• Maximum 6 months when unit is located in normal air quality environment
• Maximum 2 months when unit is located in bad quality air environment
A written log at site is adequate documentation for preventive maintenance.
• Switch o power supply before working on the unit.
• Make sure that all work has been performed correctly before switching power back on.
The unit must be cleaned according to the recommended preventive maintenance plan.
Tools required:
• Vacuum cleaner or compressed air
• Soft brush
• TX20 screwdriver
• AC cleaning agent if it is very dirty
Phase Description
1 Check and clean the outside air inlet grill. See page 8
2 Open the unit’s outer cover by removing the two screws in the lower edge of the
cover
3 Vacuum the condenser coil and the visible part of the fan
4 Vacuum the evaporator coil from the inside of the enclosure.
5 IF any of the coils are still dirty, please apply AC cleaning agent on coil ns, and
after 5 minutes, rinse gently with water WITHOUT spraying water on any electrical
parts.
6 Perform end inspection according to the list in next section.
Introduction
CAUTION
Cleaning
18
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