AC310 Universal AC Drive Service Manual
⚫ Detect the relay according to the various device detection methods provided in the
appendix for overhaul.
Note: The fan circuit is driven by a MOS tube (Q2), so it is necessary to focus on detecting
the static value of the MOS tube (Q2).
Dynamic Detection
⚫ After normal power-up, change the fan operation mode to fan running after power-up,
check the fan power socket voltage, 0V before running, 24V after running, if the fan is
connected at this time, the power supply hiccups are judged to be a short-circuited fan, the
voltage of FAUOUT when the fan is running is a low level of 0.455V or so, and the voltage
of FAUOUT is 5V when the fan is not running. 5V when FAUOUT is not running.
4. Easy to damage the device
Optocoupler, MOS tube
5. Device bit number and specifications
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