8/7/25 - Completed a light cooling maintenance on nine RTU’s and one mini split. The filters were changed and operation was tested. The mini split pre filter was also cleaned. Overall, all equipment was in good condition, it was all running well, and there were no issues found at this time.
I put the notes on the other ticket. I saw that the water was coming down the liquid line and dripping near the unit. I silkaflex the roofside of the lineset and wrapped with foam tape to seal above the witches cap that the line set goes threw the roof. Also insulted the connections at the head unit.
Replace the blower belt and set the tension in the Lennox unit serial 5607H01292 marked as #1. The existing belt was found worn and starting to separate during the recent preventive maintenance. Prices includes the parts and labor. Also sealed the mini split line set with silkaflex on the roof side and wrapped with foam tape. Due to rain water running down the liquid line and dripping inside the building next to the head unit.
1hr on ticket. Leak not coming from mini splits.
5/23/25 - Completed a full cooling maintenance on nine RTU’s. The filters were changed, the coils were cleaned, and proper operation was tested. RTU 1 has an AX44 belt that is starting to tear, in which it will need to be replaced. Overall, all units were in good condition, they were all running well, and there were no other issues found at this time.
11-27-24 No heat in Chris’s office. After locating which thermostats feed which unit and also marking the rooftop unit, at this point. I then found RTU #3 controlled by Chris’s office thermostat. This is one of new unit. Found W1 nor W2 thermostat wires were not landed on the terminal block in the RTU. This was the same and RTU #2 , which is out in the library I landed the wires, tested both units in heat mode All the heating elements are pulling 28 Amps and working at this time. RTU#2 thermostat wasn’t bringing on W1 the first time I tested it after trying it again. The thermostat did work.
Still need mix air sensor and a pivot bracket from lennox
Need to return. Supplier did provide all needed parts
During this visit the system that serves the board room was locked out on an “EE” error code. This error indicates a clogged drain, failed condensation pump and/or a water level sensor failure. The indoor cassette was disassembled to access the drain/water pump and float switch. The drain was opened and cleared on both sides of the drain using a shop vac. A new 3/4” fern was installed for the purpose of cleaning the drain. After the drain line was cleared water was used to flush the drain pan. The system was restarted and the water level sensor and the drain pump were both checked for proper function. While the system was operating I set the time and date on the kids library thermostat. (System #5). After the thermostat was set I returned to the board room to check for leaks and confirmed that the system is pumping water by checking the water level in the evaporator drain pan. The system has returned to normal function. Thank you, Jon Tech notes: m/n 40MBCQ24 - - - 301 -