Condenser fan operation
Overview:
Troubleshooting tips for newer Voyager 2 units with (2) 24 VAC Transformers and Compressor Contactors with AUX relays.
Solution:
When a newer style Voyager 2 exhibits the problem of both condenser fans not running, often the issue is that CTB-2 has a loose wire or doesn't have 24 VAC.
On the wiring diagram it looks like CTB-2 is powered from the RTRM J2 plug, but the opposite is actually true.
CTB-2 (line 75 on the attached wiring diagram) gets its power from TNS3 (line 58 on the attached wiring diagram) and CTB-2 powers RTRM J2-10 and J3-1.
Another thing to be aware of on the wiring diagram is that ODF2 controls condenser fan 1 (the one closest to the control box) and ODF1 controls condenser fan 2 (the one farthest from the control box)
If CTB-2 has power but the compressor contactor AUX relays have no power check to make sure the yellow wire W154 is connected to CTB-2.
Attached for download is a modified wiring diagram showing CTB-2 and TNS3 on the same page.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.