
2025 Rooftop Roundup
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Technical Services Manager
Southwest District
On units that are equipped with a ComfortLink controls package, the user interface for the machine will include a Scrolling Marquee keypad as shown below.
This ComfortLink controls package can be factory installed on nearly all light commercial and applied product lines. Including but not limited to 30RB & 30RAP chillers, 48/50HC RTUs, and 48/50A & 48/50N & 48/50P series RTUs.
On the left side of the Marquee under MODE there are 11 categories.
The UP/ DOWN buttons can be used to navigate between them and also be used to navigate between the many different sub modes.
The ENTER button will advance into the mode category that is highlighted by a red light.
The ESCAPE button will bring you back out of that mode.
Each mode category (there are 11) has its own set of sub modes that flow in a left-to-right manner. Using the instructions above, you can use the ENTER and ESCAPE buttons to go into or come out of sub modes.
Here are two examples:
When navigating through the modes and sub modes, most of the actual names will be abbreviated. At any time when the display is showing an abbreviation, you can press the ENTER and the ESCAPE buttons at the same time to expand what it means. When this button combination is done the marquee will scroll the wording that the abbreviation stands for. If pressing them at the same time is difficult, you can press the ENTER button and hold it then press the ESCAPE button. While the marquee is scrolling the words, you can press the ENTER button again to pause or play the scrolling message.
If the red LED is lit up solid next to Alarm Status, this is an indication that something within the unit itself or something outside of the unit has caused the system to shut down to further protect itself from damage. To get the system to come back online, the problem must be identified, corrected, and then the error code needs to be reset.
When it comes to checking and resetting an alarm(s), all the machines have the same instructions but the actual abbreviations may vary. Here is the flow without abbreviations:
While viewing the alarms in Alarm History or Current Active Alarms you can press the ENTER and ESCAPE buttons at the same time as mentioned above and the marquee will scroll the description of what the error means along with the time and date that it occurred. The same rules apply for pausing/ playing the message as well. When looking at this data it is important to also know what the system’s time and date are to ensure you get a valid timeline for the errors.
When you enter the list of alarms either current or active you can use the up/down buttons to see what the other alarms are if they exist.
7NO” will begin to flash.
Use the Up/Down buttons to change No to Yes and press enter.
The screen will display “Yes” briefly and will reset itself back to “No”.
The LED next to Alarm Status will turn off.
If the LED is still illuminated, then the problem wasn’t corrected or another issue has come up.
***If you are prompted for a password: for the purposes of this letter I will not disclose what to enter but I will advise that the password can be found in the Controls, Troubleshooting, Operation manual for your system.
The operator of the marquee should assume all responsibility in ensuring that the reasons that caused the system’s alarms are corrected prior to resetting the alarms.***
Get paid to upgrade your rooftop units with Mingledorff’s Rooftop Roundup! Earn $10 per ton when you purchase qualifying Carrier rooftop units
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Anniston | (256) 241-3026 | 105 E D St, Anniston, AL 36201 |
Auburn | (334) 734-8011 | 2295 1st Ave, Opelika, AL 36801 |
Birmingham | (205) 250-7714 | 516 31st St N, Birmingham, AL 35203 |
Dothan | (334) 836-1035 | 205 Wedgewood Dr, Dothan, AL 36303 |
Gulf Shores | (251) 968-2660 | 820 Commerce Dr, Gulf Shores, AL 36542 |
Huntsville | (256) 859-2691 | 391 Nick Fitcheard Rd NW, Huntsville, AL 35806 |
Loxley | (251) 964-2707 | 30020 Co Rd 49, Loxley, AL 36551 |
Mobile | (251) 476-2220 | 5522 W Commerce Blvd West, Mobile, AL 36619 |
Montgomery | (334) 262-4855 | 861 Plantation Way, Montgomery, AL 36117 |
Muscle Shoals | (256) 383-6904 | 107 Commerce St, Muscle Shoals, AL 35661 |
Tuscaloosa | (205) 632-7176 | 5030 Old Montgomery Hwy, Tuscaloosa, AL 35405 |
Albany | (229) 432-5254 | 205 Baldwin Dr, Albany, GA 31707 |
Athens | (706) 548-2563 | 105 Whitetail Way, Bogart, GA 30622 |
Atlanta | (404) 875-7755 | 1290 Tacoma Dr NW, Atlanta, GA 30318 |
Augusta | (706) 651-1950 | 3618 Wrightsboro Rd, Augusta, GA 30909 |
Brunswick | (912) 265-5193 | 275 Rose Dr, Brunswick, GA 31520 |
Columbus | (706) 322-3870 | 6201 W Hamilton Park Rd, Columbus, GA 31909 |
Conyers | (770) 918-9132 | 335 Gees Mill Business Pkwy NE, Conyers, GA 30013 |
Forest Park | (404) 361-2474 | 5158-C Kennedy Rd, Forest Park, GA 30297 |
Gainesville | (770) 297-9335 | 2472 Hilton Dr, Gainesville, GA 30501 |
Lawrenceville | (678) 442-1060 | 2111 Cedars Rd SE, Lawrenceville, GA 30043 |
Lithia Springs | (770) 948-3451 | 320 Thornton Rd #106, Lithia Springs, GA 30122 |
Macon | (478) 474-8544 | 5527 Thomaston Rd, Macon, GA 31220 |
Marietta | (770) 426-0551 | 1060 Triad Ct, Marietta, GA 30062 |
Newnan | (770) 239-2105 | 70 Enterprise Ct, Newnan, GA 30265 |
Peachtree Corners | (770) 239-2100 | 6675 Jones Mill Ct, Peachtree Corners, GA 30092 |
Savannah | (912) 232-1228 | 103 Central Jct Blvd, Savannah, GA 31405 |
Statesboro | (912) 764-8841 | 126 W Parrish St, Statesboro, GA 30458 |
Valdosta | (229) 245-8200 | 363 Connell Rd, Valdosta, GA 31602 |
Warner Robins | (478) 953-3727 | 110 Byrd Way, Warner Robins, GA 31088 |
Hardeeville | (843) 867-2143 | 132 Red Oaks Ln, Ridgeland, SC 29936 |
Hilton Head | (843) 689-3404 | 3715, 21 Hunter Rd, Hilton Head Island, SC 29926 |
Fort Walton Beach | (850) 244-2017 | 76 Beal Pkwy SW, Fort Walton Beach, FL 32548 |
Panama City | (850) 913-0585 | 800 W 13th St, Panama City, FL 32401 |
Pensacola | (850) 438-1005 | 4405 N. Palafox Street, Pensacola FL 32505 |
Hattiesburg | (601) 579-9670 | 1851 Lincoln Rd, Hattiesburg, MS 39402 |
Ocean Springs | (228) 497-5090 | Sunplex Industrial Park, 5717 Suntec Drive, Ocean Springs, MS 39564 |
Norcross – North Georgia Hub
(800) 282-4911
Birmingham – North Alabama Hub
(205) 250-7714
Macon – Southwest Hub
(800) 342-9250
Loxley – Gulf Coast Hub
(800) 239-7419
Savannah – Southeast Hub
(800) 822-7617
Company | Web Address | Description | |
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![]() | Aladdin Metal Products | www.aladdinmetalproducts.com | Curb Adapters and Roof Curbs |
![]() | Aprilaire | www.aprilaire.com | Indoor Air Quality Products |
![]() | Autani | www.autani.com | Building Automation and Controls |
![]() | Bard | www.bardhvac.com | Heat Pumps,Gas/Electric, and Wall Mounted Air Conditioners |
![]() | Bryant | www.bryant.com | Commercial, Industrial, Residential Heating & A/C Products and Controls |
![]() | Carrier | www.commercial.carrier.com | Commercial and Residential Heating & A/C Products |
![]() | Data Aire | www.dataaire.com | Precision Air Control for Data Processing Centers |
DXair | www.dxair.com | Pool dehumidification systems | |
First Company | www.firstco.com | Fan Coil Units | |
![]() | Global Plasma Solutions | www.gpshvac.com | Air Purification and Bi-Polar Ionization |
Gree | www.greeusa.com | PTACs | |
Hayes Fluid Controls | www.haysfluidcontrols.com | Hose Kits and Control Valves | |
iAire | www.myiaire.com | Commercial Air Purification using ionization with energy savings | |
IslandAire | www.islandaire.com | PTACs, Vertical Units, Water Source Heat Pumps | |
i-Vu | www.commercial.carrier.com | Building Automation and Controls | |
Magic Aire | www.magicaire.com | Fan Coil Units | |
Micro Metl | www.micrometl.com | Roof Curbs, RTU Accessories, & ERVs | |
Modine | www.modine.com | Gas-Fired Unit Heaters, Duct, Furnaces, Hot Water Cabinet Unit Heaters, Makeup Air, and Dedicated Outdoor Air Systems | |
Network Thermostat | www.networkthermostat.com | Internet Thermostats, Wifi Themostats, Ethernet Thermostats | |
![]() | Payne | www.payne.com | Residential Heating & A/C Products |
![]() | Rawal Devices | www.rawal.com | Continuous Capacity Modulation and Dehumidification for DX Systems |
![]() | Renew Aire | www.renewaire.com | Fixed-Plate ERVs |
![]() | Totaline | www.totaline.com | Compressors, Parts, and Supplies |
![]() | United CoolAir | www.unitedcoolair.com | Modular All-Indoor HVAC Systems |
Warren Technology | www.warrenhvac.com | Electric Heaters | |
Wilo Pumps | www.wilo-usa.com | Pump Systems for HVAC and Water Supply and Sewage |