Responded to a report from our customer's alarm company that one of their HVAC units had tripped their alarm. Upon arrival, found the #2 Lennox air conditioner with a tripped breaker due to a grounded compressor and bad contactor. Disconnected the circuit and tested circuits #2 and #3. Found a bad condenser fan motor on circuit #2, and the blower motor not coming on due to a faulty VFD. Requested VFD from provider, will source and quote the other parts ASAP. Confirmed remaining units are functional through EMS.
RESSAC technicians returned to big box retailer at the Huntington Oaks Shopping Center to completed quoted work. Technicians replaced grounded compressor and defective condenser fan motor on 20 ton Lennox unit. They also washed coils and repaired an electrical short. Retrofit is complete.
Dispatched to home goods store in Monrovia CA. Alarm panel was showing "trouble 3 smoke zone, roof duct AC4 and AC6". Inspected all six Lennox units on the roof. Repaired electrical short on unit #2. Unit #4 has defective Copeland scroll compressor. Unit #6 has shorted crank case heater. Reset fire panel alarm and cleared all trouble. Will return once quote is approved to complete all work.
Preventative maintenance on HVAC. Tested all units in heating to prepare for fall/winter.