Checking Cables, Blower Fan Does Not Start

Checking Cables, Blower Fan Does Not Start






Check the ECC control module, blower fan power unit connectors for contact resistance and oxidation according to Checking wiring and terminals - Permanent faults. Check that connectors are connected correctly Checking Wiring and Terminals

Check signal cable between ECC control module #A15 and power unit #A1 for an open-circuit according to Checking wiring and terminals - Permanent faults and a short-circuit to ground according to Checking wiring and terminals - Permanent faults Checking Wiring and Terminals

Check signal cable between ECC control module #A5 and power unit #A3 for an open-circuit according to Checking wiring and terminals - Permanent faults and a short-circuit to ground according to Checking wiring and terminals - Permanent faults Checking Wiring and Terminals

Check power supply to blower fan for an open-circuit according to Checking wiring and terminals - Permanent faults Checking Wiring and Terminals

Check ground lead between blower fan and power unit for an open-circuit according to Checking wiring and terminals - Permanent faults Checking Wiring and Terminals

If cables are OK, try a new power unit.

Remedy as necessary.

Other information:

- To connect the breakout box Connection of Breakout Box ECC
- For information on signals refer to Signal Specifications ECC Signal Specification ECC