Progressive EMS-HW50C unit
We have Porgressive EMS-HW50C about 1.5 years old and hardwired at the dealership into our new camper. Yesterday about 1:00 a.m. we heard this loud tapping noise. We thought we had a large rat in ou...
Forum Discussion
ktmrfs wrote:
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that delay is for complete loss of input power, a voltage sag doesn't (at least on mine) trigger that delay. It causes the relay to drop out. When it does that it does NOT trigger an error message. the Low voltage error will only show up if it detects low voltage during initial connection or a much longer drop than I've experienced with the "generator chatter" problem. It would be better IMHO if the EMS unit (a) had the ability to stay connected down to say mid 90V for 3-5 seconds, and (b) a 3 or 4 second delay after trip out before the contacts go back in.
As it is, they have a very simple circuit on the input 120V relay to set the input voltage limit to near 104V with almost no hysteresis. Off at 104, On at 104, rather than say off at 104 not back on till 110 or something.
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Interesting.
I would prefer it to go off below 104V and stay off according to how the jumper is set. Wonder how long it takes below 104V before an error is thrown and the delay timer is started.
I can't imagine that chatter around 104V is good for the A/C.
Thought that was what the EMS was supposed to protect against.
