According to the fault phenomena analysis, may be the power of over-voltage or over-current protection circuit action, make the output voltage drop caused by reset circuit, thus making fax to initialize. Cause power protection circuit operation there are two main reasons: one is load circuit short circuit or over current; Second, the protection circuit misoperation. NZDservice manual download site
 NZDservice manual download site
Check the power supply board + 24 v output CON1 today, the voltage of the pet-name ruby. Multimeter is the end of the voltage dc voltage profile measurement, press the "START (START)" key after due + 24 v voltage output, but the measured voltage is low, show that short circuit output. Check the load circuit, when the power is not found short circuit phenomenon. Check the power supply fan-out, found that the capacitance C23 serious leakage. After replacement of capacitance C23, fax back to normal, troubleshooting.NZDservice manual download site