freightliner S2 Operator's Manual page 54

Heater, Ventilating, and Air Conditioner (HVAC)
between the air conditioning bi-level mode and the
face mode.
IMPORTANT: Operate the air conditioner at
least five minutes each month, even during cool
weather. This helps prevent drying and cracking
of the refrigerant compressor seals and reduces
the chance of refrigerant leaks in the system.
NOTE: The heating and air conditioning system
has a brushless blower motor with a protection
or shutdown mode to prevent damage due to
overheating and overcurrent conditions. If the
brushless blower motor goes into a protection
mode, the motor will operate at a slower speed.
If the overheating or overcurrent condition con-
tinues, the motor will shut down and stop com-
pletely.
The motor will resume proper operation after the
motor has cooled or the overcurrent condition
has been resolved. It will be necessary to cycle
the fan switch off, and then on, to reset the
motor. If the problem appears repeatedly, take
the vehicle to an authorized Freightliner dealer
for repairs.
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