Remarks: Binary and decimal systems are shown in the figure, indicating fault code and fault phenomenon Be careful: In case of mixed fault, it is displayed as the sum of the two faults (for example, fan 1 and fan 2 are abnormal at the same time, and the display code is 003) 8 Common faults Table 8-1:
Fault diagnosis reference table 14 Fault phenomenon Cause of failure Troubleshooting No response after startup Battery not connected Connect the battery Loose wiring Check the wiring The battery is low Charge the battery Inverter internal input fuse blown Depot repair AC no output There is mains power Loose connection Check the wiring UPS internal output fuse blown Depot repair No mains power Inverter is not powered on Press the on/off key to start the machine Front panel buckle is not closed Switch to locked state The display panel is red Check the fault code and eliminate the cause of the fault No charging Mains power not connected Access to mains power The input and output lines of the charging board are loose Check the wiring Charging board fault Depot repair RS485 communication abnormality UPS is not powered on Press the on/off key to start the machine Reverse connection of communication line sequence Swap T +, t- Improper setting of upper computer The COM port is set correctly, and the baud rate is 4800