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27 <br />TROUBLESHOOTING - GENERAL ISSUES, CONTINUED <br />CONDITION TROUBLESHOOTING <br />Fan Emits <br />Excessive Noise <br />Check that the case is aligned, level and plumb. <br /> Check evaporator fan for cleanliness. <br /> Unplug/power off fan motors. Check motor shaft for excessive bearing wear. <br />Caution! TSP* only! <br /> Check that fan motors are securely mounted in brackets. Caution! TSP* only! <br /> Verify that fan blades are securely mounted to fan motor. Caution! TSP* only! <br /> Check that nothing is preventing blade rotation. Also, check that fan blades are not <br />bent out of shape. Caution! TSP* only! <br /> Check that the fan shroud is properly secured. Caution! TSP* only! <br />Fans Are Not <br />Working <br />Check that the MAIN power switch is on. <br /> Check that fans are plugged in at the fan shroud. Caution! TSP* only! <br /> Check for foreign material obstructing fan performance. Caution! TSP* only! <br /> Check that fan blades freely rotate within fan shrouds. Caution! TSP* only! <br /> Check that power is going to fans. Caution! TSP* only! <br /> Check that fan wiring is connected on terminal blocks. Caution! TSP* only! <br />Digital Control <br />Display Is Blank <br />Check that the MAIN power switch is on. <br /> Check the circuit breaker box for tripped circuits. <br />System Is Not <br />Operating <br />Check that the MAIN power switch is on. <br /> Check the circuit breaker box for tripped circuits. <br />Condensing Unit <br />Is Not Operating <br />Check that main power switch is turned ON. <br /> Carefully review temperature controller’s settings for accuracy. Caution! TSP* only! <br />*Trained Service Providers ONLY are to perform these tasks.