Detecting foreign, normal distribution three-phase power and press power button the fan starts operating normally. But six were no power amplifier, preamp works fine.fX4service manual download site
fX4service manual download site
After checking the main fan has a rounded box and judgments should be wind machines used for testing, open the box and sure enough contact no contact, try screwdriver touch the fan contacts, contact pull-in, amplifier power supply, the machine works fine.fX4service manual download site
fX4service manual download site
Detected by computer-controlled fan operation information to the fore, such as normal operation of the fan, CPU to inform to power amplifier, such as contacts, CPU does not receive instructions, also does not give the amplifier power supply. This happens several times, so as to resolve, carefully take the box apart, fine tuning-contact distance, completely solve the problem.fX4service manual download site