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TROUBLESHOOTING - TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY, CONTINUED
CONDITION
TROUBLESHOOTING
Fan Emits Loud
Noise
Check that the case is aligned, level and plumb.
Check evaporator fans for cleanliness.
Unplug/power off fan motors. Check motor shaft for bearing wear.
Check that fan motors are securely mounted in brackets.
Verify that fan blades are securely mounted to fan motor.
Check that nothing is preventing blade rotation.
Check that the fan shroud is properly secured.
Fans Are Not
Working
Check that the MAIN power switch is on (self-contained units).
Check that fans are plugged in at the fan shroud.
Check for foreign material obstructing fan performance.
Check that fan blades freely rotate within fan shrouds.
Check that power is going to fans.
Check that fan wiring is connected to terminal blocks