Prep site for smoke alarm test with vendor after recent HVAC installation in Tracy, CA.
Installation work continued in Tracy, CA. Multiple HVAC units commissioned.
A grocery store in Tracy California reported a unit calling for cooling constantly despite space being satisfied. Customer requested an HVAC technician qualified in controls. Our technician arrived and troubleshooting the controller in charge of exterior lighting and the humidity circuit. Discovered that the photocell was improperly installed for the exterior lighting. Will need to pull fresh wiring for the sensor to the control board, shield wiring was absent. Will need to complete the same repairs for the OSA Humidity. Will need to replace zone sensors for zones B, D & E.
Returned to a commercial site in Tracy California to complete needed repairs on two Lennox units. Our tech replaced the condenser fan motor and blade on RTU#4. Unit is functional, but found that the relay for the #2 fan motor is sticking. Will return to replace before total failure. Moved on to troubleshoot RTU#5, discovered the VFD had failed. Ordered VFD through supplier. Will return when VFD arrives.
Responded to a no-cooling request from a commercial customer in Tracy California. Our local HVAC technician arrived and troubleshooted RTU #5, finding the belt had broken and the VFD had failed. Replaced the belt and bypassed the VFD to bring the unit up and running, until the VFD can be replaced. Also inspected Lennox unit #4 and found it tripped on high head pressure for circuit #2. Condenser fan motor had failed on that circuit. Disconnected the circuit, leaving unit running on one stage for cooling. Will quote and order necessary parts for repairs.
Scheduled a home goods store for approved HVAC repairs today in Tracy CA. Upon arrival, our technician disconnected power from unit at disconnect, removed the old VFD and drivepac board. He then installed the new VFD and board, powered up the system and tested. Unit runs normally again, VFD functional and EMS showed no other issues. Job complete.
Arrived at a home goods store in San Joaquin County to complete their major AC maintenance. While checking in with the manager, our technician was alerted to an issue with unit #6 that services the offices. Brought all supplies up to the roof for maintenance and started services on #6 to help relieve the store. Found that the VFD had gone into alarm. Cycled the unit, brought back online and all parts were operating normally except for the VFD which went back into alarm. VFD has overheated and will need to be replaced. Bypassed VFD temporarily to bring #6 online again. Continued with the maintenance, service all remaining units and completing PM checklist. Will quote VFD replacement to customer.
Dispatched our Tracy CA area commercial HVAC tech to a grocery store to inspect a loud air curtain. Upon arrival, the technician found the air curtain over the main entrance to the store vibrating and making excessive noise. Found the motor bearing on far right of the unit was faulty. Will need to quote to replace motor, and return before 7am to avoid customer traffic.
AC repair tech returned to a cell phone store in Tracy, California, to perform approved repairs. The Carrier air conditioner needed a its transformer replaced and new fresh air screens. Was able to install the transformer but the air screens that were shipped were incorrectly sized. Will reorder screens and return, units operating fine.