Issue:
EXV Mod to Chiller Mod communication loss.
Resolution:
Communication problems can result from any of the following:
1. Improperly set IPC address dipswitch on module.
2. Opens or shorts in the twisted pair IPC wiring or connectors.
3. Loss of power to a module.
4. Internal module failure (check module test points).
5. Improper connections on terminal J2.
6. High levels of EMI (Electro-Magnetic Interference)
7. Module specific function selected without the Options Module.
Refer to troubleshooting information in bulletin RLC-SVD03A-EN.
Facts:
- Air-Cooled Chiller (Pueblo) (RTAA 130-400 Ton)
- Air-Cooled Chiller (Pueblo) (RTAA 70-125 Ton)
- Compressor Chiller (Pueblo) (RTUA)
- Water-Cooled Chiller (Pueblo) (RTWA)
Document Identifier: DOC-85021