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Thread: york defrost board test sequence
11-27-2012, 05:25 PM #1New Guest
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- Jul 2012
york defrost board test sequence
on a 13 seer York heat pump will the board stay in defrost after jumping the test pins like most other brands when the coil is iced?
11-27-2012, 05:39 PM #2
Should stay in defrost until Tstat opens. It may terminate after 60 minutes. Most boards do
11-27-2012, 06:55 PM #3
After the TEST terminal jumper is removed, the defrost mode will be terminated as normal - Liquid line temperature reaches 80F or after eight minutes of defrost operation.
The defrost cycle length timer will not be started until the TEST input is removed. If the TEST terminals remain shorted, the control will keep the unit in defrost mode.Instead of learning the tricks of the trade, learn the trade.
11-27-2012, 08:03 PM #4
On the York 13seer LX model I just put in - it had time/temp.
There are 2 different board that look very similar.
Rundawg described the demand defrost board.
It is important to know which one you have.
11-27-2012, 08:15 PM #5
All LX except the 5 ton have time temp which work like any other time temp but the 5 ton LX and the affinity line have the York guard demand defrost board which is the sequence rundawg posted. The older steller series also use the York guard.