[UPDATE: I think there may have been a problem with the connections in the line voltage thermostat so I swapped in a new thermostat with a plug-in outlet and updated the fan to use a power cord with plug. Things seem to be working fine now.]
Hi, all.
I’ve had an AC200L in my greenhouse for the past few months powering a heat mat for seedlings and it’s been great. Now that the weather’s warmer, I’d like to use it to power the exhaust fan which is connected to a line voltage mechanical thermostat.
However, when I plug the thermostat into AC (and the fan is OFF), the AC200L clicks a couple of times, shuts down and displays the “overloaded” and “alarm” indicators.
When I plug in the thermostat and the fan is ON, the AC200L and the fan runs fine.
Any ideas? Thanks for the help.
Hi @beagel2
don’t understand fully, what exactly you connect, but speaking generally, some devices need a lot of power when powering on. The Unit can hold that peak power for a few seconds. Does it draw more power after the few seconds, the unit displays overload.
Maybe your load has a different start power when the fan is running.
Do you have something to measure the power or can you tell by the power meter on the ac200l?
Greetings
Erik
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Thanks for the reply.
The weird thing was that it only shutdown the unit when the fan was OFF, but worked fine when it was ON.
I’m guessing there was a problem with some of the connections inside of the thermostat. I’ve replaced it with a plug-in thermostat and everything seems to be working fine.
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Great to hear that you now have a solution that worked for you 
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