Check Condenser Fan Motor

460 VAC Circuit 1. Check Amp Draw of Condenser Fan Motor Circuit a. With the unit running use a clamp on ammeter to check the current draw at CDCON on all three legs. Must be within range shown in Section 2.10 for all three legs. If higher than normal draw is read, the wiring for the motors must be separated, and each motor tested individually. b. Check fuses for condenser fan motors, F36, F37, and F38. Verify correct fuse, check fuse holder for damage, see Figure 2.4. Replace fuse as required. Clear alarms, restart and check for repeat alarm(s). c. Check voltage at CDCON contacts. Must be within range shown in Section 2.10 for L1-L2, L1-L3, and L2-L3. Must be within range shown in Section 2.10 for T1-T2, T1-T3, and T2-T3. 2. Check Condenser Fan Motors a. Check condenser fan motors. Verify there is no visual physical damage, and no blockage due to debris. Remove and replace if required. b. With the unit off, visually check fan motors and fan blades. Verify there is no visual physical damage, and no blockage to fan blades. Fan blades spin freely. Remove and replace if required. c. With the unit off, check the resistance of the condenser fan motor windings. See Section 2.10 for correct resistance. Resistance (Ohms) must be in range. No continuity from any high voltage lead to ground. 3. Check Condenser Fan Motor Connections - Inspect high voltage connections at the condenser fan motors. Verify there is no corrosion, water damage or burning / discoloration. Remove, repair, or replace if required. 4. Verify Accuracy of AC Current Sensor a. Put microprocessor in PC mode. Refer to Section 5.3.2 page 5-8. Must have 0 AC1 Amps and 0 AC2 Amps in Unit Data. b. Use a clamp on ammeter to measure current draw of all three legs of the T side of GENCON. Meter reading should be the same as Unit Data: Compare meter reading to Unit Data in PC mode. Compare meter reading to Unit Data with unit under load.