System Analyzer Form – Mobile – Carrier Enterprise Technical Support

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This guided troubleshooting form will walk you through the same diagnostic process our technical support team uses to evaluate system operation. Using only standard hand tools, you’ll collect the information typically gathered during a field service call, allowing us to provide faster and more accurate technical assistance.

Please select your region. *

Name *

First

Last

Dealer/Company Name *

Email *

Phone *

Job Site Name *

Mode of Operation & Conditions

Mode of Operation *

Outdoor Temperature *

Indoor Temperature *

Thermostat Setpoint *

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We need to gather the indoor unit information and check airflow.

Industry standard is 400 +/- 50 cfm per a ton of cooling. Example a 3 ton system our goal is a minimum airflow of 1050 cfm or a maximum of 1350 CFM.

Do you have a Fan coil or Gas furnace w/ cased coil? *

Fan Coil
Gas furnace with cased coil

Furnace Model # *

Furnace Serial # *

Evaporator Coil Model # *

Evaporator Coil Serial # *

Fan Coil Model # *

Fan Coil Serial # *

Any fault codes flashing or displayed on the LED? *

Remember the Fast(Rapid) Flash is the first number and the Slow Flash is the second number of the fault code. 3 quick flash and 1 slow flash is a code 31.

Code # *

Pictures of the Indoor Unit

Drag & Drop Files, Choose Files to Upload You can upload up to 4 files.

Indoor metering device type *

Piston
TXV

What type of control do you have? *

User Interface Touchscreen (Communicating)
24v control

User Interface

Any fault codes in the USER Interface history? *

Go into the service menu by pressing and holding the service hat icon until it turns green, once in the installation & service menu, page down by pressing the carrot in the bottom right corner and then select service information. Then select last 10 system events.

Pictures of last 10 system events

Drag & Drop Files, Choose Files to Upload You can upload up to 4 files.

Please take a picture of each event

User Interface Touchscreen (Communicating)

Go into the service menu by pressing and holding the service hat icon until it turns green. Then select the installation option, then select the blower assessment test, start the test, it will take about 3 mins to complete, once the test is complete record the information below.

System CFM *

System Static Pressure *

Blower RPM *

Minimum CFM *

Now that you have completed the Duct assessment.

Place the system into Cooling Check Charge mode and manualy verify the system static pressure.

How would you like to check the airflow? (Fan Coil) *

Elect Heat Method – using formula
Static Pressure Method

How would you like to check the airflow? (Gas Furnace) *

Clock The Gas Meter Method
Static Pressure Method

Describe how your blower is set up

Static Pressure

Record the static pressure with a manometer. Measure the return and the supply separately and then add together to get the total static. Forget the + and – and just add the numbers together. Example +.5 measured in the supply and -.3 measured in the return = .8 in wc Total static. Reminder this is a Blower, not a sucker. DO NOT worry about entering the + or the – or the decimal point(.), just enter the number displayed on your manometer.

Supply Static after the Evaporator coil *

Supply Static for the fan coil *

Supply static between the Furnace and Evaporator coil *

If you do not have a spacer between your gas furnace or coil to get the pressure reading. Yes you will need to drill a hole in the side of the furnace(just in the top 2-3″of the cabinet, and just enough to penetrate the cabinet).

Fan Coil Return Static *

The return static should never exceed .4″

Gas Furnace Return Static *

If there is a add-on filter outside of the gas furnace. Take this measurement between the Add-on filter and the gas furnace.

Fan Coil Total Static *

Now refer back to the product data to evaluate performance against the static pressure charts.

Gas Furnace Total Static *

Now refer back to the product data to evaluate performance against the static pressure charts.

Note

When checking airflow for cooling operation you must first take the furnace and set it up for cooling airflow when the furnace is operating for this test.
You may have to change the wire speed tap on your motor or IFC.
For the IFC take the wire used on the cool tap of the board and move it to the heating tap of the board for this test.
For a X13/Constant Torque motor take the wire from the heating tap and move it to the cooling tap for this test.
For a variable speed furnace without a User Interface adjust your dip switches to match the cooling airflow as close as possible.
Once the change has been made place the unit in the heating mode and turn off all other natural gas appliances. Go to the gas meter and time how many seconds it takes for the furnace to consume 1 cubic foot of gas. And then measure the temperature spilt of the gas furnace at the furnace.

Watch short gas-meter test video? *

Seconds to consume 1 cubic foot of gas *

Return Temperature *

Use the same thermometer to measure the temperatures.

Supply Temperature *

Use the same thermometer to measure the temperatures.

Calculating gas furnace airflow by clocking the gas meter

Verify input BTU of furnace: 3600 sec in an hour / Seconds per a cubic foot of gas the furnace consumed = cubic feet per an hour consumed X AVG BTU content of 1050 = give us the input BTU’s of the furnace. Make sure it is within 2% of input valve listed on the nameplate of the furnace. If not adjust gas pressure. Then take the output rating listed on the nameplate and / temperature split / 1.08 = CFM. Example 3600 secs / 62 sec to consumer 1 cubic foot = 58 cubic feet of gas consumed X 1050 = 60,900 Btu’s Input, Nameplate say 60k input, we are good as long as within 2%. Then look at output rating of the furnace 54kbtu. Take the 54,000 Btu output / your temperature split(52F measured) / 1.08 = 961 CFM.

Electric Heat

Place the unit in emergency heat and run for about 10-15 minutes while you are gathering your measurements, yes even on a 90 degree day. Take the blower door off and measure the High Voltage going to the Fan Coil(you can also get this in the disconnect), after the door is OFF, measure the amp draw of L1 or L2 coming into the fan coil, total system amp draw, while the door is off, get an amp draw of the fan motor. Then place the door back on the unit and measure the temperature split of just the elec. heat at the fan coil.

High Voltage *

This is the power coming to the fan coil.

Total Fan Coil Amp Draw *

Indoor Fan Motor Amp Draw *

Electric Heat Amp Draw *

Take the total measured amp draw of the fan coil and subtract the indoor fan motor amp draw. This will give you the amp draw of just the Elec heat.

Return Temperature *

Use the same thermometer to measure the temperatures.

Supply Temperature *

Use the same thermometer to measure the temperatures.

Electric Heat formula for Residential CFM

VOLTS X AMPS X 3.41 / 1.08 / Elec heat temperature split = CFM

Electric Heat formula for Commercial CFM 3Ph power

VOLTS X AMPS X 3.41 X 1.73 / 1.08 / Elec heat temperature split = CFM

What is your calculated CFM?

Last Step before we go to the outdoor unit.

Measure and document the liquid & vapor line temperatures before we leave the indoor unit.

F. Indoor unit Liquid Line Temperature *

G. Indoor unit Vapor Line Temperature *

Resume Later

Outdoor unit measurements

Now place the unit in the Cooling mode of operation and let the system operate a minimum of 15 minutes. With a USER Interface you must use CHARGING MODE. Once in Charging mode you must wait until the stabilization timer has counted down to zero before you can start checking your measurements.

What Type of Outdoor unit do you have? *

Heat Pump (Cooling Mode)
Air Conditioner

Condenser Model # *

Outdoor unit

Condenser Serial # *

Outdoor unit

Any fault codes flashing or displayed on the LED? *

Fault Code # *

Pictures of the Condensing Unit

Drag & Drop Files, Choose Files to Upload You can upload up to 4 files.

Pictures of the Outdoor unit

A. Liquid Line Pressure *

B. Liquid Line Temperature *

Calculated Subcooling *

Always look at the data tag for required sub-cooling. Industry standard is around 10 of sub-cooling.

C. Vapor Line Pressure *

D. Vapor Line Temperature *

Calculated Superheat *

F. Indoor Liquid Line Temperature

G. Indoor Vapor Line Temperature

Outdoor Unit High Voltage *

Outdoor Unit Amp Draw *

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Refrigerant Piping Information

Vertical positioning between indoor and outdoor units *

Outdoor and indoor units on same level
Outdoor unit is lower than indoor unit
Outdoor unit is higher than indoor unit

Approximate refrigerant lines LINEAR length (ft) *

The distance between the outdoor unit and indoor unit.

How much lift between the indoor and outdoor unit? (ft) *

Was a solenoid valve installed? *

For heat pumps any lineset with a length longer then 80′ or has 20′ of vertical lift, should have a solenoid valve installed. For air contioners any lineset with a length longer then 80′ or has 35′ of vertical lift, should have a solenoid valve installed.

Liquid Line size *

Vapor Line Size *

Do refrigerant line sizes change? *

If Yes please describe the change *

Is there a liquid line filter drier installed *

Where is it installed? *

At the outdoor unit
At the indoor unit

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Indoor Operating temperature splits

Return Dry Bulb Temperature *

Taken at the unit, not the grills.

Return Wet Bulb Temperature *

Taken at the unit, not the grills.

Supply Dry Bulb Temperature *

Taken at the unit, not the grills.

Supply Wet Bulb Temperature *

Taken at the unit, not the grills.

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Are you currently working with a Technical Support Representative?

Case # or Technical Support Representative name

Optional: provide the existing case number and/or the Technical Support Representative name.

Any other notes or observations?

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