3
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss
of life.
Installation and service must be performed by a licensed professional HVAC installer (or equivalent) or service agency
1. Safety Considerations
WARNING
Electric Shock Hazard. Can cause injury or death. Unit must be rounded in accordance with national and local codes.
Line voltage is present at all components when unit is not in operation. Disconnect all remote electric power supplies be-
fore opening access panel. Unit may have multiple power sources.
WARNING
Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before
troubleshooting.
Test the voltage between P and
N on back of the main PCB with
multimeter. If the voltage is 36V, the
capacitors are fully discharged
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