Bill:
The answer to your question is the EC2 only cares what the pin 30 state IS, in conjunction with which injectors are being supplied power plus what your MP and RPM are.
With the DPDT switches you are always disabling one set of injectors and enabling Cold Start simultaneously – if they are wired correctly, as per EC2 manual.
If you are below staging, ~1400 rpm and you disable the SEC injectors/enable CS, nothing should happen because the EC2 knows you have turned OFF power to the SEC and your MP is low.
If you are below staging, ~1400 rpm and you independently enable CS, PRI and SEC injectors should deliver fuel because EC2 knows both have power ON and your MP is low – this is Cold Start region.
There really is no reason to go above staging (high MP/RPM region) to prove the CS feature in conjunction with MP, RPM and INJ power are working correctly.
Jeff
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From:
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Bill Bradburry <flyrotary@lancaironline.net>
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Subject:
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RE: [FlyRotary] Re: parts upgrade; was: What do you think may be happening?
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Date:
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Mon, 25 Jan 2016 15:07:58 -0600
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To:
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'Rotary motors in aircraft' <flyrotary@lancaironline.net>
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Steve,
Ok, when you turn on the disable switches, they ground the pin 30 input on the EC-2 to the case of the
EC-2. When you turn on cold start, you ground the pin 30 to the case. How the heck does the EC-2 know the difference so that it can act differently???
Bill
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