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DCM1 service 2 of 2 AC completed changed (1) 16x25x4 filter, tested system operation’s everything is operating properly at this time attached is AC maintenance checklist.
Unable to complete maintenance, mechanical room door locked
411 - quote blower cleaning, indoor cleaning, vent replacement and up lamps
Removed existing outdoor TXV and filter dryer. Brazed in new outdoor TXV and filter dryer while flowing nitrogen. Pressure tested system with no leaks found. Vacuumed system to remove moisture and non-condensables. Achieved a vacuum of 432 microns. Added 13 lbs, 8 oz of R420a and tested system. Installled new phase control monitor Discovered indoor fan had a failed contactor. 0 ohms across contactor coil. Replaced contactor. System operated as designed in both heating and cooling modes. Checked system #5, system had leaked out all nitrogen, still unable to determine leak location. Recommend adding refrigerant to conduct next leak search. System #2 still appears to still be down due to faulty smoke sensor
DCM1 service 1 of 2 Heat completed changed (1) 16x25x4 filter, tested system operation’s everything is operating properly at this time attached is heat maintenance checklist.
DCM1 comply; Heat; (1) F14201 checked. Didn’t have filter size. System is operating within design tolerances. Refrigerant pressures and temperatures are appropriate for indoor and outdoor conditions. Heat checklist attached.
DCM1 complete; Heat; (1)F16251 replaced. System is functional. All components are operating within manufacturers specifications. Gas pressure and temperature rise are within design parameters. Heat checklist attached. Blower wheel is extremely dirty, however pulling to clean would be difficult due to location of existing gas line. Ductwork has issues. Some vents where you would expect returns are actually supplies, some vents you would expect supplies are actually returns and one supply isn’t hooked up Filter was extremely dirty and green mesh located in main return could/should be removed
Moved unit heater up about 20in. As high as possible for flue to vent properly. Moved gas line so that it is higher as well. Reconnected flue vent.
Work completed RTU #1 : fully operational RTU #4 : took the phase control monitor from RTU #3 and installed on RTU #4, system is fully operational RTU #6 : Let system run for 2 hours, identified no leaks. Flushed drain pan and “ P-trap” and primed drain. System is draining RTU #2 : Replaced compressor, filter dryer and 30 amp fuse. Added 2oz of acid away, Conducted pressure test as well as vacuum to remove all moisture from system. Added 13 lbs of R410. Tested system. The system itself is fully functional. Amp draw across compressor as well as refrigerant temperatures and pressures were a within design parameters. Smoke sensor on unit is open causing system not to run. Need to investigate that sensor RTU # 3 : needs the phase Control monitor we ordered for RTU #4 in addition to the already known faults RTU #5 : Unable to investigate to determine the refrigerant leak location
Arrived to diagnose 6 RTUs, all 6 units are from 2016, R410A, and Heat Pumps RTU #1 : System operates as designed RTU #2 : Grounded compressor RTU #3 : Outdoor TXV ( utilized in heating ) has failed. Sensing bulb is no longer attached to the TXV and equalization line has a leak in it. Video attached RTU #4 : Phase Control Monitor has failed RTU #5 : System is empty on refrigerant. Conducted an electronic leak search, found low 1-7 ppm of refrigerant at evaporator. RTU #6 : Contactor on indoor fan had failed. 0 ohms across low voltage side of coil. System operates as designed
No a/c found found water in the SS2, drain looks clogged up draining slow, gave homeowner entities clear drain and add union for drain to be serviced easier, Homeowner is going to Repair himself.
Identified multiple issues with system 1. Fan speed is too high, resulting in reduced temperature drop across the coil. Reduction of fan speed is possible, but reducing the fan speed will causing additional motor windings to energize. The motor is 21 years old, the possibility of motor failure after changing fan speeds in older motors is high 2. Refrigerant ( R22 ) pressures and temperatures are elevated. Amp draw on compressor is slightly elevated 5.1 , with a 6.0 RLA. Possibly R407C has been added to the system Homeowners request a comfort specialist for free quote
Routine heat maintenance in Decatur
