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How do you measure the SCR in the ATS46 and what value indicates they are good?

To measure the SCRs on the ATS46 you need to first remove the control head totally and make sure it is not connected.
Then you will measure across L1 to T1, L2 to T2 and L3 to T3 with power removed.
The readings should indicate at least 50,000 ohms for SCRs that are good.

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