Preventative Maintenance
6.1.6 Inspect and Clean Condenser Coils
During times of peak usage, the condensing coils must be able to offer maximum thermal exchange. Debris
such as paper, dead leaves, and dust can be sucked in around the coils, reducing the thermal exchange rate.
Dirty condenser coils may trigger the high-pressure switch and cause the compressor to lock out.
Remove any objects from the coil which may have accumulated and wash the system with water and
commercial coil cleaner. The coil should be inspected more frequently if the environment experiences seasons
of high dust or falling leaves.
6.1.7 Inspect and Clean the Drain Pipes (Both Evaporator and Condenser Drain
Pipes)
To avoid water overflow, ensure that the system has proper drainage discharges. The pipe and outflow should
be completely free of any obstructions. If necessary, clean the drain and outflow area.
6.1.8 Physical Inspection of the Damper
The air damper is a critical element in the WPU. If it does not function normally, the free cooling function will
fail. This can be avoided by periodically and regularly checking the following:
• Check if the damper can fully open and close via the manual override
Remove
bottom-front
Take off
the filter
Clean the
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