If you’re looking for help fixing your Armstrong air conditioner, look no further! Our comprehensive Armstrong air conditioner repair guide will explain common issues, provide troubleshooting tips, and show you how to read your model’s error codes.
PROBLEM: Device communication problem – No other devices on RS BUS (Communicating systems only).
FIX: Equipment is unable to communicate indicates numerous message errors. In most cases errors are related to electrical noise. Make sure high voltage power is separated from RSBus. Check for mis-wired and/or loose connections between the stat, indoor unit and outdoor unit. Check for a high voltage source of noise close to the system. Fault clears after communication is restored.
PROBLEM: Low line voltage.
FIX: Line Voltage low (Voltage tower than nameplate rating). Check power line voltage and correct. Alarm clears 5 seconds after fault recovered.
PROBLEM: Line voltage polarity reversed.
FIX: Reverse line power voltage wiring. System resumes normal operation 5seconds after fault recovered.
PROBLEM: Ground not detected.
FIX: System shuts down. Provide proper earth ground. System resumes normal operation 5 seconds after fault recovered.
PROBLEM: High line voltage.
FIX: Line Voltage high (Voltage higher than nameplate rating). Provide power voltage within proper range. System resumes normal operation 5seconds after fault recovered.
PROBLEM: Line voltage frequency out of range.
FIX: No 60 Hertz power. Check voltage and line power frequency. Correct voltage and frequency problems. System resumes normal operation 5seconds after fault recovered.
PROBLEM: Low 24V.
FIX: 24 Volt Power high (Range is 18 to 30 Volts). Check and correct voltage. Check for additional power robbing equipment connected to system. May require installation of larger VA transformer to be installed in furnace/air handler. Clears after fault recovered.
PROBLEM: High 24V.
FIX: 24 Volt Power high (Range is 18 to 30 Volts) Check and correct voltage. Check for proper line voltage (120V 240V etc) to equipment. Clears when control senses proper voltage.
PROBLEM: Poor ground detected (Warning only).
FIX: Provide proper grounding for unit. Check for proper earth ground to the system. Warming only will clear 30 seconds after fault recovered.
PROBLEM: Unresponsive device (Communicating systems only).
FIX: Usually caused by delay in outdoor unit responding to indoor unit poling. Recycle power. Check all wiring connections. Cleared after unresponsive device responds to any inquiry.
PROBLEM: Active communicating thermostat signal missing for more than 3 minutes (Communicating systems only).
FIX: Equipment lost communication with the thermostat. Check four wiring connections, ohm wires, and cycle power at the thermostat. Alert stops all services and waits for heart beat message from thermostat (subnet controller). Cleared after valid thermostat (subnet) message is received.
PROBLEM: Control failed self check, internal error, failed hardware. Will restart if error recovers, Integrated control not communicating Covers hardware errors (flame sense circuit faults, pin shorts, etc).
FIX: Hardware problem on the control. Cycle power on control. Replace if problem prevents service and is persistent. Cleared 300 seconds after fault recovered.
What Our Clients Are Saying About Us
I would like to recommend your company to anyoneNovember 19, 2020
Your company KDM Home & Gas has just installed the CV 50 water heater to my house. The installation process was so smooth. You guys put on the carpet runner in order to avoid any scratch and damage to the carpet and the floor. Your professional guidance has highlighted the B Vent should be installed for the chimney exhaust in order to comply with the building & safety code. You have even performed leak test & dial test in order to make sure the whole installation is in a perfect manner. The registration of the warranty is also very convenient and easy.
I really appreciated that you came to my house to inspect the situation and provide the quotation to me before we decide to get the new water heater. The whole process was so smooth and communicate very well. You return all my text message on the same day basis or even within short time. I would like to recommend your company to anyone.
Work was done neatly. Can barely see the pipe that was installedNovember 19, 2020
Work was done neatly. Can barely see the pipe that was installed. Priced really well.
KDM's cost was amazingly reasonable compared to all other quotesNovember 19, 2020
The tricky plumbing job was completed carefully and thoroughly . Daniel even did extra to make the job proper, within the quote . He patiently explained the work needed before and after completion . In good time, he returned calls and messages, detailed the work, listed every cost honestly, and answered any questions pleasantly . Daniel and his partner were always courteous, and respectful to keep the work clean in my house .
The replaced part is of high quality, thank you ! And his cost were amazingly reasonable compared to all other quotes.
I would recommend this company to anyone who is looking for a professional job at a reasonable priceNovember 19, 2020
KDM did a very professional job paying attention to safety and TSSA codes for this type of work.
At the end of the job they tested all gas fired appliances as they had the main gas off to preform this job, and made sure everything was working proper.
I would recommend this company to anyone who is looking for a professional job at a reasonable price.
I would recommend KDM Home Gas to anyone looking for quality home repair servicesNovember 19, 2020
Daniel was really great to work with. His communication and genuine care for the work being done made all the difference in the world to me especially as we’ve never had good experiences with contractors in the past.
Daniel showed up when he said he would, and took his time to explain to me what caused my humidifier to malfunction. His customer service skills are superior and his quality workmanship made the experience a pleasant one.
I would recommend KDM Home Gas to anyone looking for quality home repair services to their heating or cooling units.
Thank you guys! We couldn’t be happierNovember 19, 2020
Dan and his team were extremely professional, courteous, and clean. They showed up on time, and completed the installation exactly when they said they would finish by. Thank you guys ! We couldn’t be happier.
I highly recommend KDM HomeNovember 19, 2020
Daniel, Shane and Steve did a great job replacing our 3 appliances today. They’re true professionals that pride themselves on making sure everything is done correctly, within budget and on time. They answered all my questions and were more than willing to give helpful advice. I highly recommend KDM Home.
I would recommend KDM Home & Gas to anyone looking for great service at a good price.November 19, 2020
After our old (20+ years) unit gave out, I used HomeStars to obtain quotes for a replacement. Within 30 minutes of posting, I was speaking with Daniel, who was polite and helpful throughout the process. He offered a fair price and a few different products to choose from, and was able to do the installation the same week. I would recommend KDM Home & Gas to anyone looking for great service at a good price.
Great guys Daniel and Shane did an excellent jobNovember 19, 2020
Great guys Daniel and Shane did an excellent job clean efficient and on time also very knowledgeable will have them back to replace furnace.
KDM did our fireplace gas line and heat ventingNovember 19, 2020
We’re finishing our basement and had a gas line out in for a fireplace, as well as a heating vent out in bathroom.