5. Monitoring system reports communication failure Phenomenon: The monitoring unit reports communication failure, high-frequency rectifier module communication failure, etc. Solution: 1. Check whether the model of the monitoring setting and the configured model are consistent with the address. 2. Check whether the unplugging address of the sub-device is correct (reset after unplugging). 3. Check whether the wiring is correct, whether the sub-equipment is working, and whether the RS485 bus is disconnected or wrongly connected. 6. Arrester failure Phenomenon: The arrester used in the system is a 3-unit arrester.
If the color of the status indicator window of a certain unit changes from green to red, it indicates that the arrester is Unit failed. Solution: Replace the arrester immediately according to the replacement operation sequence. 7. Alarms from the monitoring unit Phenomenon: The monitoring unit emits an alarm sound, and the LCD screen displays the corresponding alarm information. Solution: According to the alarm information, perform corresponding processing according to the alarm processing operation sequence of the monitoring unit. я AC voltage too high/low alarm: Use a multimeter to check whether the AC voltage is normal. If it is normal, check the AC voltage alarm of the monitoring unit.
Upper and lower limits. я AC phase loss alarm: Use a multimeter to check whether there is a phase loss in the three-phase AC; if not, the voltage is below 100V. я No communication alarm: Whether there is really no communication. Check whether one of the two AC contactors is closed; if so, check whether the three-phase AC contactor is closed. There is a lack of phase. я Output overvoltage/undervoltage alarm: Check whether the system is current limiting; use a multimeter to check whether the output voltage is normal. If it is normal, check the monitoring unit. The output voltage alarm upper and lower limits; if it is abnormal, check the setting of the output voltage of the monitoring unit.
яBattery overcharge/over-discharge alarm: Check the upper and lower limits of the battery overcharge/over-discharge alarm of the monitoring unit; check the battery current limit setting of the monitoring unit Whether it is greater than the charging current alarm upper limit; whether the load current is greater than the discharge current alarm lower limit. —- 12 —-