York Chiller weird alarms

[dlove]

Inquiring minds want to know...what did you find?

The switch is good and we have both 120V and 24V to and through the switch. I got called away before I got much farther than that. I traced it to where it goes into the lower circuit board and we have voltage at that point

[supertek65]

i do not think a switch will cause numerous error codes?????

[KnewYork]

i do not think a switch will cause numerous error codes?????

The "weird alarms" were taken care of previously. The problem now is the chiller won't run.

[dlove]

update,,,,,I had a factory rep come out and perform a diagnostic on it... they hooked it up and ran all the test everything checked out fine. went to start it up everything worked great???? they couldn't say why or what may have locked it out. My only assumption when i was checking the connections on the boards to make sure they were seated right may have done some thing or, when they hooked up the computer something corrected itself. anyway,,, the mystery continues i will keep you all posted.

[dlove]

here's one more issue we came up with during our testing

We can’t run the York at full capacity because it surges. I was told we need to change the variable orifice valve and actuator. Since we don’t run the York during peak times we haven’t needed to run it at full capacity so we haven’t had any issues with it.

could this be the only reason it surges? and if i left it alone and didn't run it at full capacity do you see any reason to make the repairs?

Thanks!

[dlove]

here's one more issue we came up with during our testing

We can’t run the York at full capacity because it surges. I was told we need to change the variable orifice valve and actuator. Since we don’t run the York during peak times we haven’t needed to run it at full capacity so we haven’t had any issues with it.

could this be the only reason it surges? and if i left it alone and didn't run it at full capacity do you see any reason to make the repairs?

Thanks!

Let me restate one part...I know other reasons why chiller surge...other than the obvious reasons like temps, and air...I was curious why they think its the orifice...

[KnewYork]

We can’t run the York at full capacity because it surges. I was told we need to change the variable orifice valve and actuator. Since we don’t run the York during peak times we haven’t needed to run it at full capacity so we haven’t had any issues with it.

Sorry, but I'm going to hold my BS card up on this statement. But perhaps I don't have all the necessary information. Why are they stating that the problem is with the VOV and actuator? Is the VOV or actuator inoperable? When you run the chiller at less than full load is there a level in the condenser sight glass? Have you programmed a trending screen and trended the level in the condenser? Do you have large changes in the level percentage? If you have the condenser filling and draining you may get it to surge, but it seems more likely that you would run the risk of failing on LEP as you stack too much liquid in the condenser.

Does this chiller have a VSD? Set up a trending screen with ECHW temp (data point 1), LCHW temp (data point 2), Condenser Liquid level (data point 3), % PRV (data point 4), VSD frequency (data point 5) and condneser water inlet (data point 6). Set interval for 5 seconds and start the trend. Take a photo of the screen after the charts fill the screen and post it.

I still want to know how they can possibly condemn both the VOV (a butterfly) and the actuator at the same time. When the chiller is not running have you tried to close the VOV by using the raise/lower liquid level buttons on the condenser screen when in the service mode?

[dlove]

I agree, Yes it a VSD. I will try to get this done asap. thanks, good input.

I had a similar problem on a carrier and that turned out to be only the actuator, it was messed up. So that's why i had to ask..i just got this feeling in my belly.

[dlove]

update,

so come to find out the VOV is frozen and will not move, which in turn fried the actuator. It amazes me why i have to find this out well after the fact. been this way for sometime from what i have been told. So will make plans to repair it. Not sure when this happened. I'm not on site there a lot and for the most part it runs but never has to fully load. So i guess they figured they didn't have to fix it. but i plan too. This building landed in my lap several months ago, so i have been finding a lot of interesting things. need to find a good York service provider in the Atlanta, GA area.

I plan to do this during our winter shut down and PM.

KnewYork, your know your stuff and i appreciated your input..Thanks

[KnewYork]

I plan to do this during our winter shut down and PM.

You, as in yourself? Or are you going to bring someone in to perform the repairs? I haven't heard of a VOV becoming "stuck" and inoperable. It's just a butterfly valve. Have you removed the actuator and tried to turn the VOV with an adjustable wrench? Also, if you take the actuator and set it on the ground can you get it to operate from the condenser level screen (in the service mode)? The actuators shouldn't "fry" because the valve is stuck. Not saying it isn't, but I would be inclined to double check it.

[KnewYork]

dlove, put an email address or allow PM in your profile and I'll send you a referral for a company in Atlanta.

[dlove]

dlove, put an email address or allow PM in your profile and I'll send you a referral for a company in Atlanta.

my profile has my e-mail ...just so you know the property is closer to Macon Ga. 1.5 hr from Atlanta if that helps.

Yes, i spoke to my Tech he tried to move the VOV and we disconnected the actuator he said they both don't move.

[KnewYork]

Sorry, I must have missed it earlier. I sent you an email.