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Takes an O-ring. Make real sure the internal checkvalve is holding before you unscrew the plug. Sometimes the plug can be very hard to unscrew the first time.

3/4" ok also what seals the end is it a o-ring or just a machine seal?

Originally Posted by fordtrucksrule

Another ? What size is the Allen key I need to change the internal oil fliter on the screw compressor? It looks close to 1/2 inch

3/4" and lots of rags if you don't do it right.

Another ? What size is the Allen key I need to change the internal oil fliter on the screw compressor? It looks close to 1/2 inch

15% is what it is set at from the factory. On these chillers you will get a lot of nuisance trips at that setting. I always set them at 20-22% and have never had any problems. I have been told by the Carrier 30 series guru that he has no problem at setting them up to 30%. You can only set them up to 30% with latter software.

the% current imbalance is 3.29 is thenormal, maximum by the plant is 15%, check electrical connections to the module cpm.etc

ok the amp draws are as follows 76.4 78.8 and 81.4

The voltage imbalance setting can cause you to have alot of nuisance trips on the 30HX and 30GX chillers . It will not hurt anything to set it up to 22%. If you still have trips set it higher.

the percentage of voltage imbalance is 0.6%
where maximum deviation 3volts x 100 = 300/479 = 0.626%

amp?

The voltages are as flopped 477 479 482 ave is 479 so max devation is 3 volts on l3 and 2 volts on line 1

which is the voltage deviation? could give more details? readings of voltage and amperage

A1 & A2 compressor "unbalance setpoint should be 15% default" it alarms after a continuous 15% or more for 25 minutes.

B1 "no current" if there is a call for B1 comp and there is no amp draw on all 3 legs for more than 3 seconds it will alarm.

Are than any other alarms in history log? power fails, phase loss etc.. Thats pretty strange, might be the beggining of a board problem.

Might check primary connections and voltages to transformers serving Klixon modules (CCP's) and secondary connections and voltages. could also be a transformer problem. It would be more logical if there are not any other alarms in history log. especially because it is with 3 compresors and it is on the amperage side (alarms) with no voltage alarms

yes it is a wye delta starter. as far as i know no one has messed with the parameters.

Originally Posted by fordtrucksrule

I had this same issue at about 3 weeks ago and i found one of the 0/1 wires going to compressor a1 at the crimp connection was bad and corroding. i had the same issue 3 weks ago same codes. ive check the contactior and check voltage drop across and they were under .03v across the contactors, so i know the contactors are good any other ideas

Not unless someone changed the imbalance setpoint and you haven`t changed out a starter lately, it is wye delta right?

I had this same issue at about 3 weeks ago and i found one of the 0/1 wires going to compressor a1 at the crimp connection was bad and corroding. i had the same issue 3 weks ago same codes. ive check the contactior and check voltage drop across and they were under .03v across the contactors, so i know the contactors are good any other ideas

Loose connections or you really had some sort of weird power issue with all 3 compressors going flaky.

Carrier 30gxr

Hey i have a carrier 30gxr225f611cl ecologic r-134a screw chiller today i walked up to it today to 4 alarms those were a152 (down due to failure) t055 (compressor b1 failure no current) and t052 and t051 (compresor a1 and a2 off due to current unbalance. I first checked the wireing to the klixon module 3 in total and check them to the mail control board and all connections were good. then i reset the chiller and got compressors a1 and b1 to come on and i check for voltage imbalance and amprage imbalance at the klixon modules and ch power at disconnect all were below 5% devation Any other ideas?