Troubleshooting
Historical faults and fault alarms are queried and the following checks are performed according to the prompts in the monitoring display window.
1.1.1 Historical Fault Query
Press the key in the U04 monitor display to enter the "fault inquiries" column, you can view the history of faults.
1.1.2 High Frequency Module Failure (Alarm)
The digital display on the module panel shows "ERR" or the indicator is off and the window is not displayed. Check whether the three-phase AC is normal, whether the hot plug connector is firmly connected and whether the DC output is open circuit.
1.1.3 Bad insulation (alarm)
Check the bus.
1.1.4 Bus Voltage Abnormal (Alarm)
In the monitoring display window, “overvoltage of mother-in-law” and “undervoltage of mother-in-law” are displayed, and check whether the set value is normal.
1.1.5 Control Mother Voltage Abnormal (Alarm)
In the monitoring display window, “control mother overvoltage” and “control mother undervoltage” are displayed. Check if the set value is normal.
1.1.6 DC Open Trip (Alarm)
Check the corresponding circuit for a short circuit.
1.1.7 AC power failure (alarm)
Check if the two ACs are powered off.
1.2 Maintenance and Maintenance
1.2.1 Sturdy screws.
After six months of equipment operation, all connecting screws should be sturdy, especially the main circuit connecting screws.
1.2.2 Battery Activation (Except for this function)
1.2.3 Repair Replacement of High Frequency Module and JK0403 System
Pull the high-frequency module and the hot-swap plug on the back of the JK0403 online. Loosen the fastening screws on the module and the JK0403 panel. Pull out the module and the JK0403 from the front.
1.2.5 Replacing the Battery
Use a special puller tool to pull out the two NT00 fuses to separate the battery pack from the system and replace the battery.
1.2.6 DC screen shutdown
Disconnect all DC feed-out switches, disconnect the AC line feeds QF1 and QF2, use the special handle tool to pull out the two NT00 fuses, and turn off the DC screen.