I haven't worked on one of these things in years. No documentation with the unit. (natch)
It has been sitting for at least a year. The air handlers in the building are running. In the ceiling so haven;t been to eyeball them yet. Chiller in alarm and will not start. I bumped each contactor for condenser fans and compressors and they run when contactors are pushed in. There is plenty of gas in the system. The chill water pump was running and the system was pressurized I cleared all the alarm codes and reset the system and tried to start it. Lots of clicking and and clacking in the control module but no contactors pulled in and it went into alarm. "Manual Reset Compressor Trip Ckt 1"
Same for CKT 2
I didn;t have too long to mess with it today but i am assuming a flow switch or temp switch is locking it out. When I put it in the service mode and press "Test start" the relays click and it acts like there is a time delay and relays click some more. It does not go into alarm but no contactors pull in. When I checked the chill water pump the water was hot, probably 110 degrees or better. i am guessing manual or automatic valves are closed and the pump is cavitating. No disconnect and no way to tell where the power is feeding the pump. Tomorrow if I can't find a breaker or disconnect I'll just cut the leads till I do. The control panel said the chiller thought the water temps were 73 out and 75 in. Obviously a flow problem.
This chiller has a single large circuit board. there are three connectors just hanging. not sure yet if they are for optional controls or what. When I get more time on it I will make sure I have water flow and if it dsoesn't start check each circuit.
If the manual reset code gives anyone a clue to the actual circuit locking out the comporessors I would appreciate any suggestions.