Knowledge Base Index :   Compressor Protection

What are the two "TDO" push button override switches for?

There are two momentary-contact Time Delay Override (TDO) switches, TDO1 and TDO2, one for each stage. They are on the PC board to speed up the checkout of the HVAC systems. For complete information, see the installation instructions.
NOTE: Before using the TDO switches YOU MUST disconnect the HVAC R wire in order to avoid short-cycling the compressor.

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Date Created January 24, 2008
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