atlas copco atsl140 wont start
by Tim Patten
The ats1-140 oil free compressor we use at work has repeated problems with the pressure switch. The unit runs continuously from 9am to 8pm and probably wasn't designed to do so to start with.
I have replaced the switch 4 times in three years which seems excessive.
This time the after replacing the switch, the unit will not start unless I "jump" start it by pressing on the contactor or the switch contacts. Then it runs to the correct pressure and shuts off. It will not restart unless I "jump" it again.
I'm not thinking it is the wiring because it wouldn't start at all (I think). What else could it be, contactor or maybe unloader valve? It does click at once the low pressure is reached but not starting.