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6. MAINTENANCE
6.4 Fans
The following steps should be taken to maintain the fans:
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6.5 Filter
Every 6 months:
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Every 12 month (or if Filter Check appears on the display):
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6.6 Heating coil
The following steps should be taken to maintain the heating coil:
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6.7 Double cross flow heat exchanger
The double cross flow heat exchanger has no mechanical part, therefore only the plates
should be checked and cleaned if necessary. Clean the plates with a soft brush or use a
high-pressure cleaner with compressed air and blow against the air stream.
6.8 Dampers
The following steps should be taken to maintain the dampers of the unit.
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Check the fan wheel for unbalance (every 3 months).
Check the fan and motor bearings for unusual noise (every 3 months).
Check the fan for dust or dirt. If necessary, clean the fan wheel either dry or wet (every
3 months).
Take out the filters.
Check the filters for dirt and damage.
Clean the filter rail and reinstall the old/new filters.
Take out the filters.
Clean the filter rail and reinstall new filters.
Press the
Cancel key to reset the service interval in the control
Check the coils for dust or dirt. If necessary, clean the aluminium fins with a soft brush
or a vacuum cleaner.
Check for water leakages.
Air the coil circuits through the exhaust valves of the pipe system (air in the pipe
system may reduce the capacity)
Check that the frost sensor (if installed) is properly fixed.
Check that the damper setting is in accordance with the current operation mode (every
6 months).
Check that the damper louvers can rotate when the damper motor is running and that
they close/open completely (every 6 months).
Check the fixing of the motor/damper shaft (every 12 months).
If necessary, clean the damper louvers either dry or wet (every 12 months).
Check the rubber gaskets for damage (every 12 months).
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