Condenser Motor 2 Overheated

1. Check Condenser Fan Blades for Free Operation - Visually inspect condenser fan blades for any foreign material or damage or anything that will prevent the blade and motor from turning freely Fan blade must be in good condition. No sticks or other material obstructing it’s movement No ice build-up preventing blade rotation. 2. Determine if the IP is open a. Check for Continuity between PM-31 and PM-34. Should be 0 Ohms. If condenser fan motor is extremely warm, allow it to cool off, then recheck IP continuity. b. If open, continue with step 7 below. 3. Check Fuses - Check F11, F36, F37 and F38 Verify correct fuse, check fuse holder for damage, see Figure 2.4, Figure 2.5. Replace fuse(s) as required. Clear alarms, restart and check for repeat alarm(s). 4. Check Condenser Fan Motor Contactor a. Inspect the wire connections to the contactor. (See wiring schematic Section 10.2) No signs of overheating of the contactor. Wiring is routed correctly to the contactor. b. Check tightness of the contactor wire connections. Tighten with screwdriver and check for discoloration of wires. 5. Perform Pretrip - Clear Active Alarm list, then run Pretrip and check for any new alarms. Any active alarms must be corrected and cleared before proceeding. 6. Check Condenser Fan Motors - Disconnect power plug at motor. Test IP circuit for continuity using ohmmeter. If IP remains open after a 30 minute cool down period, and motor feels cool to the touch, remove and replace motor. If closed, then an intermittent IP circuit is suspect. Check phase to phase and phase to ground for short or open circuits. Refer to Section 2.10 for correct electrical values. If motor tests good, check the DC IP circuit to microprocessor. 7. Check IPC circuit a. Use Component Test mode to energize CDCON2 circuit. (Refer to Section 5.2.4.) Output will come on. b. Verify 12 VDC at Pin A of CDCON2 12 VDC indicates that the IP is closed. c. Unplug the connector to condenser fan motor (CDM2) and check voltage on pins 4-5 in the engine harness connector to ground. Check voltage at pin 5, should read 3 VDC. No voltage indicates an open from pin 5 to PM-34 Check voltage at pin 4, should read 12VDC. No voltage indicates open from pin 4 to PM-31. d. Test continuity through CDM2 IP at pins 4-5 in the fan motor harness connector. Should be 0 Ohms. If condenser fan motor is extremely warm, allow it to cool off, then recheck IP continuity. 8. Check Motor Operation - Turn the unit ON. Check current on each phase (must be less than shown on Section 2.10.) Check voltage on each phase (must be within voltage limits shown in Section 2.10.)