York Chiller Problem

[navyhydronics]

Went to pm this chiller m# YCAL0080EC17 and found sys 2 down. did history and got the following MP/HPCO fault, SYS 2 Fan off, LLSV on, SP 70 DP 166, runtime 10 min, Compressor 3 ON.

Is this Caused by the fan off ? but i see discharge pressure is kind of low for high pressure cutout.

Never worked on a chiller just trying to get a feel before i start.

I have not reset the unit yet, will do that tomorrow.

[drpsr99]

After reset Check carefully the Sequence of operation of ever component.

[york56]

What is the number on the microboard ? should start with a 031-xxxxx-xxx

[BACnet]

That's the 2050 board, right?

[DFZ]

if it has the copeland compressors check the motor protector, we've been changing them regularly on alot of units.

[navyhydronics]

Well fellas, i reset the unit today system 2 started up and compressor 5 and fan(s) started running then suiddenly stopped about a minute later and got a system 2 mp/hpco inhibit as system 1 took over as lead.

I did not check to see if manual reset on high pressure swt, but like DFZ was saying i think it maybe the overload.

I go there for one thing but since i do everything i get asked about other stuff.

They have a split system that iam thawing as well, so when i go back to check that unit i will attempt to continue fault isolation on this chiller.

[navyhydronics]

What is the number on the microboard ? should start with a 031-xxxxx-xxx

Didnt get the board number but it looks like the 035-21176-100. If you search on google the pdf comes up.

[york56]

Didnt get the board number but it looks like the 035-21176-100. If you search on google the pdf comes up.

What you search on google doesn't account for whats is in the machine that is why I asked you what micro board it has , that may eliminate something right away it could be a module but as stated you need to eliminate each componant one at a time until it doesn't fail best of luck to you