Pre Lube on Carrier 30GX

[Not]

Hello everyone,

I don't know if someone out there can help but I have a Carrier 30GX chiller which will not prelube.

I believe the oil pump is supposed to start before everything else fires up. This is not happening on one of the circuits. The control boards have been swapped, so I am confident that this is not the problem. What else could hold the pump off? There are no alarms so I presume this circuit is waiting for something like the oil temperature to be correct! The heater is working so I am at a bit of a loss.

Many Thanks

[james10]

Does the pump work?

[Not]

There is no power to it, but I haven't connected it directly to a power supply. This is maybe something i can try first.

Thanks

[Grizzly]

There is no power to it, but I haven't connected it directly to a power supply. This is maybe something i can try first.

Thanks

OK Not.
So there is no power to the oil pump.

Follow the Link and a wiring diagram and legend will reveal that-
either your individual 110v transformer has failed or there is no output from terminal 9 = EP 7* output.
* is 1,2, 3 or 4. dependant upon which circuit is at fault ie EP72 is the oil pump for circuit 2.
Terminal 9 is on that circuits Compressor monitoring, control and safety module. A*c .

This circuit also flows through KM* Comp contactor and SP* HP switch.
So you should be able to trace your issue.
Good luck Grizzly


http://www.mediafire.com/?v57j5j15a5...bcj3a2j67o04xt

[Gibbo]

Check the oil pump operation via quick test this will allow you to energise the oil pump and check electrical output to pump

[Not]

Hi Grizzly,

I am going to site tomorrow so will see if I can trace this through. I'll let you know how I get on.

Thanks