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- For A/C with variable displacement compressor, when the compressor work status is found abnormal, it is necessary to accurately diagnose whether the fault is the compressor itself, the ECV solenoid or the electronic control system. ECV600 can test the control PWM signal issued by the electronic control system, and can also bypass the electronic control system to directly drive the compressor ECV valve, as well as it can test the resistance of the ECV solenoid. Eventually the ECV600 can accurately determine the fault is the electronic control system, the compressor or the ECV solenoid.
This ECV600 can largely reduce repair time and cost, eliminate misdiagnosis, and avoid the costly repeated repairing. The tester also has electric protection when battery cable is reversely connected by mistake.
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Specifications：
1.Power supply: Battery power,12VDC
2.Power cable length: 2.5M
3.Test cable length: 2.1M
4.Connectors: specific connector 12 pairs (male and female), universal connectors 3 pairs (male and female).
5.Duty cycle range the tester issues: 18%-84%, PWM signals. The bigger the duty cycle is issued, the larger displacement the compressor achieves.
6.Protection against reverse battery connection.
7.Test function: Measure the PWM signal issued from control system, to determine the control system work status.
8.Output function: Issue PWM signals of different duty cycles to check if the compressor works properly,thus to determine the compressor work status. In this function the duty cycle of PWM is changed manually by pressing the buttons.
9.Resistance function: Measure the resistance of ECV solenoid. The normal resistance range of ECV solenoid is 10-14Ω，out of this range can be considered ECV solenoid failure.
10.Automatic function: Instead of changing duty cycle of PWM manually, in this function the percentage of duty cycle changes automatically from minimum to maximum (1 minute), and then from maximum to minimum (1 minute). This can free the technicians’hands from pressing the tester buttons, while they only need to observe the HP and LP manometers.