Had a new Daikin furnace and air conditioning installed, efficient and good crew installed it promptly. However, I started getting a Blower Motor Limit Alarm, I called Button's Heating and service man came over. He was unable to clear alarm and didn't know what was causing it. While he was here, I noticed my humidifier was connected via a transformer hanging in the electrical compartment of the furnace. I questioned him and he said that was the only way they could connect it. After he left, I read the installation manual and found the proper way to connect a 24v humidifier and removed the unnecessary transformer and connected it properly. A few days later, I noticed my duct booster fans weren't running. I looked into this and found the wire to them was cut off at the furnace. No mention of this was made by the installer. I looked into this and was able to add a relay to control the duct booster fans and put them back in service. I still have the alarm, and don't know whether it is ruining my furnace or what to do about it.
Follow-up: Button's Service Manager, Mark, came over. He explained the use of the transformer and benefits, re-installed using a proper mounting bracket. As for the Blower Motor Limit Alarm, he found that I had put the fan at 100%, being a variable speed fan when it tried to ramp up it couldn't because it was already at 100%, thus the alarm. He recommended setting the fan at low speed, which cleared the alarm, it hasn't returned and the furnace ramps up as necessary. He did notice a high static pressure, which is unexplained at this point, probably due to legacy duct issues with a new furnace. Most of the issues could have been prevented by more communication with the homeowner.