Inverter Phase Check Helps Solve Problems
An electronic indicator, the Inverter Phase Check has been launched by EDC International Ltd to help contractor/installers when an inverter-controlled air conditioner fails. The difficulty is to know whether it is the compressor or the inverter, which is causing trouble but the Inverter Phase Check can pinpoint precisely which is faulty.
When using the Inverter Phase Check module the supply connections are disconnected from the compressor, and are connected to the module. When the inverter is switched on the six lights on the module should light up red, yellow and blue. If the inverter PCB is faulty, one or more of these lights will not switch on, and this indicates the position of the fault.
If all six lights are on, the PCB is fine, and the fault is with the compressor. If they are not all on, or one light is significantly dimmer than the rest, then the fault is with one or more of the output transistors on the PCB, or with the drive circuitry.
The Inverter Phase Check is small enough to drop into the toolbox, it is 81 x 73 x 28mm, and will always help with the analysis of problems on site. It is CE approved for use up to 440V 3-phase inverters.
Although small, it is not intended to be hand-held, and all power supplies must be safely turned off while the module is being connected. The maximum is 440V 3 phase 50/60Hz and the connections are 3 x 1/4in male Faston tabs.
A Kit of connection leads is available for use with this indicator. The three leads are each 1 metre long and fitted with insulated 1/4in female Fastons for connection to the indicator box. The remote ends are fitted with shrouded crocodile clips with a safety finger guard, manufactured to meet the safety requirements of IEC1010 and rated at 1000V.
The Inverter Phase Check and the connection leads are designed to comply with the CE Low Voltage Directive when used as directed on the Instruction leaflet.