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With those numbers it does look like ckt 1 is overcharged. Subcooling at 32 and SH at 10 with 266psi head. What is your water entering temp? Are you sure the free cooling coil valve isn't leaking?...

Low airflow would cause and can be verified by amps vs nameplate FLA. If that was an issue, i would think you would of heard of hot spots in the room by now. You said this unit has a free cooling...

Air in the water side will cause the refrigerant head pressure to rise. An air pocket flowing around in a system can cause HP tripps based on when air enters the condenser, the refrigerant pressure...

Sounds like the 20psi difference is coming from whoever installed the TXV and didn't properly adjust along with that high subcooling. Is this unit condenser an air cooled or water cooled? What where...

How old is compressor? SH is a little low but sounds like the powdercoat didn't adhere properly and under constant heat load (172F) is causing the bubbling. How bad is the bubbling?

Yes, you said the plate machine was off and i was asking can you turn the min-mate off at night also? if so, then activate the setback feature in the wall box to shut it down at night. This SCR is...

The SCR Reheat in the Mini-Mate is for a more precise temperature control. It is not designed to reheat a room. When cooling is activated the SCR's are activated to control the temperature drop more...

HGBP would only come into play if you were having some Low Suction issues and that would be from Low Load. If these units have proper load then HGBP should not be activated. From what your saying...

Are all XDV's running? Sounds like low load. you have 320kw of cooling capability with 2 chillers. You need at least 40%(130kW) to run them properly. What is the load in the space? U may have to turn...

How may tons of cooling do you need currently? How far away are the condensers and what elevation? Need more info..

Thanks Guy's, I appreciate it. Glad I am able to help. I am known as a Liebert junky even though I don't work there anymore, but I still push the product because I think it is great and the...

To access the Set Mode 2 programming functions, perform the following steps: 1.

Use the Advance push button to scroll to the red TEMPERTURE led.

2.

Simultaneously press and hold the...

I have a PDF for the level 00, Here is some info from the Service Manual. I can't post PDF's to this site.
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Microprocessor Control Board Display and...

Here you go:


Install Manual:
http://www.emersonnetworkpower.com/en-US/Brands/Liebert/Documents/Discontinued%20Product%20Documents/SL-18200.pdf


O&M Manual...

Where are your High and Low Humidity alarm points set to? The lamps do not lower temperature. You have to look at all aspects when trying to trouble shoot humidity issues. 5% is to...

What is your OAT? 240 would be ok if your OAT is 80+. Head pressure on an an air cooled unit will be affected by OAT. I like the numbers on your other compressor. 200 is more reasonable for current...

The compressor pumped down after power cycle due to it just completely shut off on a safety and did not pump down. Another concern is that the unit is making temp at 68F with one compressor, which...

Those pressures seem to good to be true. Sounds like a faulty Low PSI Switch. They are Auto reset. Only HPS is Manual reset. You could test the LLSV by having guages on and cycle compressor off and...

What were your pressures if you don't mind?

Also, is this an air cooled unit or water cooled?

That sensativity set points are very tight. The temp set point is low and rh is high. With no real room load, you need to balance the units with the sensativity. With all concrete walls, that adds to...

I agree with keeplearning.

If you are using a Residential unit to cool this room, the only option you have is to install a head pressure control device to cycle the condenser fan in 0F and let it...

No arguing- Just discussion.. The book states -maintain 230# to ensure the head pressure control valve is closed. You are correct in that it does state above the sightglass. I was taught to charge it...

You need to float the ball at 1/2 sight glass at 230-240. It is tricky to do and you have to be ready for it. These are easy to over charge.

What Chiller Guy said.

Also, I have ran into this problem too many times on Start-up's when I was at Liebert. That High Head + Flashing Sight glass was always 99.9% NON-Condensables. Some one...

There will be alot of variables to answer that question. What is your critical load kw? How may CRAC units are there and what size are they? Is your room raised floor? Basically your cooling tonnage...