5703827-XIM-A-0319
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Johnson Controls Ducted Systems
Blower assembly
Even with good filters properly in place, blower wheels and motors can become dust laden after many months of operation. Inspect
the entire blower assembly annually. If the motor and wheel are heavily coated with dust, you can brush and clean them with a
vacuum cleaner.
These units are supplied with blower shaft bearings that do not require maintenance but may be relubricated if required. Every three
years, use a low pressure grease gun to pump grease into the bearing grease fitting until grease just begins to show at the seals. Do
not over lubricate. Use any lithium-based grease recommended for ball bearing service.
Motors
Outdoor fan motors are permanently lubricated and require no maintenance. The ventor motor is factory lubricated for an estimated
10-year life. The indoor blower motor features ball bearings that do not require periodic lubrication. However, if the motor has grease
fittings, periodic lubrication of the motor bearings can extend the life of components but is optional.
Every three years, use a low pressure grease gun to pump grease into the bearing grease fitting until grease just begins to show at
the seals. Do not over lubricate. Use any lithium base grease recommended for ball bearing service.
Condenser coil
Check the outdoor coil annually. Clean the coil as often as necessary to keep the coil clean. Clean any debris and dirt from the
outside coil face with a brush being careful not to damage the fins. If the coil is extremely dirty, you can use a hose to wash the coil
from the inside out. You can brush a soapy solution on the outside.
Registers
Supply and return air registers must be open when the unit is in operation. Make sure that obstructions do not block the airflow in or
out of the registers.
Troubleshooting
Before you call a service person, complete the following checks.
• Check the thermostat settings and insure that the thermostat is calling for cooling.
• Check the thermostat for lint.
• Check the fuses or circuit breakers.
• Check the filters for excessive dust accumulation.
WARNING
Perform all maintenance operations on the blower assembly and motor with electric
power disconnected from the unit. Do not attempt to lubricate bearings with the unit
in operation.
WARNING
Perform all maintenance operations on the blower motor with electric power
disconnected from the unit. Do not attempt to lubricate bearings with the unit in
operation.
CAUTION
Damage can occur if the bearings are over-lubricated. Use grease sparingly.
