Repair Technician

You will be diagnosing failed drives down to the component, repairing them, and load-testing them before dispatch. This is a workshop bench role, with occasional site visits to customer plants.

• What you will do: Receive failed VFDs, take fault history from the customer, and carry out systematic diagnosis — input rectifier, DC bus, IGBT module, gate driver circuit, SMPS/control supply, current sensors, control card
• Trace faults at component level using multimeter, oscilloscope, LCR meter and ESR meter
• Replace IGBT modules, thyristor/diode bridges, DC link capacitors, driver ICs, current transducers, cooling fans and relays; carry out clean soldering and desoldering on multi-layer boards
• Run the repaired drive on load bank / test motor, verify output waveform balance, thermal behaviour and trip response before clearing it for dispatch
• Maintain a repair record for every unit: fault found, root cause, parts replaced, test results
• Identify failure patterns and advise customers on root causes — supply quality, overload, ambient temperature, cable length, cooling
• Attend customer sites for drive commissioning, parameter setting and breakdown support when required
• Keep the workshop, ESD practice and spares inventory in order

Must have Hands-on component-level repair of VFDs, or of closely related power electronics online UPS, servo stabilizer, welding inverter, solar inverter, DC drives, SMPS

• Ability to read and follow power and control circuit diagrams
• Confident use of multimeter and CRO; comfortable checking IGBT and rectifier health with diode test
• Practical soldering / desoldering skill on SMD and through-hole boards
• Understanding of three-phase power, PWM inverter basics and drive protection trips (OC, OV, UV, OL, earth fault, phase loss)
• Electrical safety discipline — DC bus discharge, ESD handling, LOTO