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I wonder if the unit is a Trane package unit with multiple condenser fans.

Model Number would help

Get the Bitzer app

Stan, check your mail for the controls book I sent as a link

Can you post a log with the operating conditions.
What are the pressures and at what percentage is it running at?

As for the oil pump I use a Ritchie Richie 77930 hand pump.

Nuclrchiller you are right. That does have the older UCP2 panel on that unit.

I was looking at a RLC-SVD04B-EN which is for RTHC and RTHD and just saw the CH530 on the cover and assumed it was...

Sounds like you have not performed binding correctly, or perhaps your configuration is incorrect.

Did you check the type of starter in configuration and verify that it matches your application.

It sounds like you may have the wrong solenoid coils. Did you verify that you have the correct part number and that they are rated for 12 Volts DC.

There have been times that the wrong parts were...

Here is some useful air side formulas:

Sensible air conditioning:
BTU/hr = 1.08 x CFM x Delta T

Latent air conditioning:
BTU/Hr = 4.5 x CFM x Delta H

Water heating or cooling:
BTU/hr =...

Something is missing and not working per design. Specific information is needed in order to help.

Actual pressures need to be known other wise you will be guessing. With out known operating...

You may want to consider first verifying that the chilled water pump is moving the correct amount of water flow in terms of GPM,

Check inlet water pressure and outlet pressure and convert to foot...

I did not see that he was talking AHU. Sounds like he has a Trane TTA

Thats right, more info is needed such as a complete model number and a serial number.

The type of control board such as Micro Control or Reliatel makes a difference and requires a different...

Sounds like the duct work is very dirty also.

Welcome to the site.
Need more info. Complete model info. Are you saying that you have a COMM interface that is not communicating with a building control system? or is it that you do not see the...

Have you logged the chiller and checked all controls and contacts for proper operation?

What was the actual error code?

There are many reasons why you could have an error code, but perhaps you...

What is the full model number and serial number

What is the actual RLA and have you verified that the amp draw is within range.

Have you logged the chiller and verified that all sensors are...

Why not just list them in your contacts and set up a category as customers or equipment and list the information as a note . I have done it that way for years.

When calculating in fahrenheit I come up with 2.3 GPM per ton.

What is the make and model number of the air handler?
What is the required CFM through the CW coil. Is this constant volume or VAV.
What is the total external static pressure of the blower and have...

Each System is unique and depends on the specific application. As for a system such as yours in a low temp application you will need to consider the strategy of loading and unloading based on...

What is the Model Number. Does the Voyager unit have the Microcontrol Board or Reliatel?

Have you checked the main gas pressure and the mainifold gas pressure?

Do you have a medium gas pressure...

Here is some useful info

David check this out. Let me know if you need specific info?

So what are the actual voltage readings?

More information is needed.
Complete operating conditions.
What is the return air temp.
What is the supply air temp.
What is the coil temp.
What type of refrigerant.
What type of oil did the...

How many total running hours do you have on that machine?
How many starts?
What was your resistance reading of the auxiliary contacts.
Did you actually get an alarm?

Model number?

What were the operating refrigerant pressures.
Did you verify that the sensor was reading correctly

aircond.com
emcor

There is nothing to think about.
If you want to earn top dollar and have the best training that is available then it should be very simple for you to answer.

I know guys making over scale at...

Decade Box

What is the model number?

Tranetek you beat me to it.

Sounds like you are having an intermittent failure with a safety control and as stated earlier will lock out after 3 attempts in a cooling...

Thats weird. Did you also ohm out the auxiliary contacts.

Do you have the original design conditions?
11.55 Ft Head pressure drop seems like a low water flow condition.
8 degree approach looks high. When was the last time the tubes were cleaned?
What is...

We know that, but you need to verify that you have a correct reading.
What is the superheat at the compressor?
What is your discharge superheat?

WHAT IS THE MODEL NUMBER?

The reading should be "0"

What is the Model Number?

RTAC?

www.ua.org

Tell me you didn't rip the Name Plate off?

Welcome to the site. No need to watch drama TV when you can participate here.

So what was the problem?

What type of starter do you have.
What is the position of the inlet guide vane at start up.
What is the entering condensing water temperature.
At what percentage does it start up at and how long...

Have you checked the guide vane actuator to see that it is calibrated correctly.

Here is a bulletin that may help.

Have you checked to see if the liquid level sensor is accurate?

What type of liquid level sensor do you have. Is it an internal or external LLID?

It is possible that you are getting an...

What is the entering water temp and leaving water temp.
Have you used tech view to check dead band of staging.
Are the temp sensors and pressure sensors accurate.

This is what I have come up with for your existing system.

• 5/8 liquid line with 180 FT total developed length and 80 feet vertical drop with 8 elbows:
• 236 FPM liquid line velocity
• -32.54...

Why do you think you are not getting the correct oil return to the compressor. Have you experienced a compressor failure?
Is the piping arrangement correctly sized?
Have you verified that the...

Have you checked the oil filter pressure drop. What about the suction temperature sensor, is it accurate. Can it be that you have a bad suction temperature sensor?

Does that circuit have a hot gas by-pass valve installed and is it open?

Intellipaks can run and be controlled many different ways.

These units can be controlled by a simple time clock with start/stop functions and control itself based on set up.

Set up can be...

I have never heard when supplying 100% airflow through a VAV box will cause a negative effect.

Most VAV systems are rated to handle well over their field selected design.

As for your system...

"The decade box is a "nice to have" accessory, but it is not necessary for service.[/QUOTE]"

Do you have a decade box?
Does that mean that you prefer not to use It?