In some cases contractors choose to replace the complete inverter pack if there is a problem with the inverter. While this is the easy option it can also be the most expensive. In many instances only one or two components have actually failed & can be replaced & have the system fully operational again for much less cost than a fully reconditioned inverter pack.
In many instances this has resulted in considerable cost savings when the only other alternative would have been to replace the complete inverter pack at a cost of thousands £££.
Again Tim draws on many years experiance of investigating & resolving inverter problems & can usually resolve inverter problems (given spare parts available) within an hour or two & have the system fully operational again.
Sometimes contractors have difficulty with accurate diagnosis of compressor faults because it is not possible to test run inverter drive compressors direct on line due to excessive start current.
Some years ago Tim pioneered the use of an industrial inverter to independently test run the compressor to asses its operation. The compressor can be started with forward or backward rotation, high torque or low torque start sequence. This is because the industrial inverter can be programmed for a variety of start up & run parameters. During start up & run sequence the volts / HZ / amps are all monitored & displayed by the inverter control display. This test procedure confirms if the compressor is locked or draws excessive amps as it ramps up.