ZR 110 trip shows motor overload temp

by Nawawi
(Malaysia)

My ZR110 tripped on motor overload temp ...i want to now the root cause

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Apr 23, 2017
ZR 110 trip
by: Doug in s.d.ca.

For starters -

Make sure you (still?) have the correct voltage into it. Then look for signs of burnt or melted wiring in motor circuit.

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GA37VSD over temperature when starting

by Tom
(So California )

Our ga37vsd when starting will overheat and shut off before it reaches its 120psi mark.

If I assist with another compressor and then put ga37 online it will run.

It can handle the small dips in pressure. Just not the initial startup with air system empty.

I added a little oil to reach half height of sight glass level, blew out fins on top from inside blowing out, and blew out air filter.

There is a small stain of oil on the air filter though and that's not right.

This compressor runs a mid size cabinet shop and is in its own enclosed room (10ftx10ft) with whole house fan on and large fresh air intake opening. Temp typically runs @ 180deg average. When it over heats it runs to 238deg which is the programmed high temp shut off.

Any and all help is much appreciated. Tom

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Sep 09, 2017
dryer
by: Doug in s.d.ca.

OK, it's refrigerated. I'd think most any A/C tech could work on it, and you could clean it out yourself. The trick might be resetting that timer...

Anyway, have fun...

Sep 07, 2017
Reply
by: tom

Maintenance contract only covers compressor. It seems from talking to other a/c techs that since air dryer has freon in it and EPA regulations it takes like some type of certificate to service. The 4 or 5 techs that have come to service compressor didn't know much about air dryer unit. I'm assuming they do have at least 1 tech with this air dryer certificate in each area. It's basically just an air conditioner.

Sep 07, 2017
Thermostat,
by: Doug in s.d.ca.

as suspected.

Does the service not include the dryer? Anyway, yeah, sounds like it's due for some pm. Have fun.

Thanks for the update.

Sep 06, 2017
Reply
by: Tom

Yes, scheduled service came last week. Score marks on thermostat was causing thermostat to open to slow causing a overheat and shutdown. We set motor to run at 85% since there's not huge air demand once reaching pressure. Been running fine since. Runs at 180-200 then fan cools back down.oil was dirty and we may need 3 mth services instead of 6 mths. Now I need to look at our water separator unit dp120 A/C. The light is on on the wrench symbol. I believe it's a time setting for maintenance. I can scroll on the screen to the warning and its on the hours screen.

Sep 05, 2017
GA37VSD startup trouble
by: Doug in s.d.ca.

So Tom - did you find anything out?

Aug 24, 2017
Reply
by: Tom

You bet. I'll let you guys know.

Aug 24, 2017
GA37VSD startup trouble
by: Doug in s.d.ca.

You're welcome.

Alright. Sounds good.

Let us know what the tech says after he's serviced it and keep us posted after that, OK?


Aug 23, 2017
GA37VSD over temperature Reply
by: Tom

Thx for diagram. Tech will be out Friday for 8k/hr service. I think it's the thermostat not opening soon enough. That is a part that's replaced of at 8k/hr. Also we may need sooner interval services then every 6 months due to our working environment. I made compressor room more isolated about 3 months ago meaning it now draws almost all fresh air. Not shop sawdust air with fresh. Tech said oil spot on air filter isn't uncommon.

Aug 22, 2017
Tom:
by: Doug in s.d.ca.

Sorry, you said you did not have a diagram.

Try here:

http://www.aimcompanies.com/public/userfiles/files/Atlas_Copco/GA%2037-75.pdf

Look on page 8 for a schematic of the systems.

You should be able to figure yours out from that...

Aug 22, 2017
GA37VSD startup trouble
by: Doug in s.d.ca.

Yeah - look at the oil system drawing.

It's part of the oil filter area. They call it "BV" bypass valve. You can tell if it's working by the temperature of the line going to oil part of the radiator. I suspect it may not be opening as fast as it should. Or maybe sometimes not at all, or not far enough.

You should be logging these events (or maybe the controller does - I dunno) so A-C service people can see what's happening.

Aug 21, 2017
Reply
by: Tom

It seems to be intermittent. Started up fine this morning since sitting off from mid day Saturday and is running fine 180-190 deg.

Yes I checked fan Saturday and it's turning on and off as necessary.

This unit is under a maintenance contract with AC and has preventive maintenance every 6 months. Last visit was for when we lost power and the display screen component had to be replaced. It's just past 3yrs old. And runs 115 hrs a week (with 3hr shutdowns between shifts)

I'm not sure what to look for on oil bypass line. Unless it's on schematic sheet. I don't have a diagram of components and locations.

Aug 21, 2017
Start-up overheating
by: Doug in s.d.ca.

Tom -

So, is this a routine thing, or intermittent?

Disregarding the oil spot for now, have you checked that the oil bypass valve is working, and the oil rad gets warm/hot?

And of course, the fan is working?

Anything else you've checked or routine maintenance that may have triggered this?


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Element overheating


(chennai)

Element 1 overheating above 220 degrees in normal ambient temperature

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Aug 16, 2017
Ga22
by: Bubba

Faulty thermostat or clogged up oil cooler

Aug 02, 2017
Overheating
by: Anonymous

Ga22 all new filters and oil

Jul 20, 2017
Overheating Atlas Copco compressor
by: Bill

What is the model number of the compressor, please?

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