HCM-IMM (10/16) 13
M aintenance
– Regular Care
Once a year, remove the parameter screws of the top cover of the HCM so that you can access
the A419 Johnson Temperature Controller display. Check that the display of the A419 Johnson
Temperature Controller does not say “SF” (Sensor Failure). In the case of a sensor failure, the
HCM would shut off and stay off.
If that’s the case, contact EarthLinked support at 1-863-701-
0096 for help.
Regular Care
:
Keep the Hybrid Cooling Module free of foliage, grass clippings, leaves, paper and any other
material that could restrict the proper air flow in and out of the unit.
If the coil becomes excessively dirty, clean it using standard coil cleaning methodology:
Turn the main power disconnect switch to “OFF” and wash the coil with a garden hose
and an appropriate coil cleaning solution, spraying water from the top of the unit in a
downward direction over the coil surface. Avoid getting water into the fan motor and
control box.
