UPS Status Messages
34
52 DC Bus Abnormal
Shut off inverter due to abnormal DC bus voltage.
Suggested Action
Check whether there is fault in rectifier side, if no, then check whether overload occurs.
53 System Transfer
The whole paralleled UPS system transferred to bypass at the same time. This message
will appear on the UPS which passive transfer to bypass.
Suggested Action
If the parallel operation system transfers to bypass mode, and the operation condition
enables, all the UPS modules can recover to normal mode synchronously.
54 Parallel Board Fault
Something wrong with the Parallel board.
Suggested Action
1. Replace the M5 board
2. If the alarm is still exist
a. check the power cable of the M5 board.
b. check the wiring between M5 auxiliary power board and the U1 control board and
the signal of Load Sharing Relay to the U1 board, replace the U1 board as required.
55 DC Bus Over Voltage
Rectifier, inverter and battery converter were shutdown because DC bus voltage is too
high.
Suggested Action
Check whether there is a fault in rectifier side. If no, then check whether overload occurs.
Restart the inverter after RESET the fault.
56 Parallel Connect Fault
The parallel cables are not connected correctly in a parallel system.
Suggested Action
Confirm that the alarm is genuine by checking the parallel cables and make sure that the
cables were connected as a circle.
1. If the alarm is genuine, reconnected the parallel cables in a ring.
2. If the alarm is not genuine,
a. check the power cable of the M5 auxiliary power board and fault signal from the M5
board to the U1 board. Replace the M5 board as required.
b. check the wiring between M5 board and the U1 control board and the signal to the
U1 board, replace the U1 board as required.
57 Bypass Over Current
Bypass current is over limit above 135% rating.
The UPS just alarms and does nothing.
Suggested Action
Confirm that the alarm is genuine by checking the load current indicated on the LCD panel
to determine which phase is being overloaded and leads to the bypass over current.
1. If the alarm is genuine, measure the actual output current to verify that the indications
are valid. Disconnect unnecessary load and ensure the safety.
2. If the alarm is not genuine:
a. verify that the correct UPS kVA rating has been set via the configuration software.
b. replace the U1 control board.
58 Inverter DC Offset There are high DC voltage at the Inverter output (Reserved)
59 LBS Active
The LBS setting is active.
It means the UPS is acting as an LBS master or slave in a dual bus configuration.
60 Setting Save Error Something is wrong when Saving parameter. (Reserved)
61 Parallel ID Error Parallel ID Error. Unit ID invalid or duplicate within parallel system. (Reserved)
62 Mains Neutral Lost
63 Balancer overtemp. Balancer over temperature.
64 Protocol version clash
Protocol version between monitor unit and DSP unit is not compatible
Suggested Action
Please check monitor, rectifier and inverter firmware version.
65 Battery ground fault Battery ground fault from dry contact signal.
66 Manual Turn On Manual Turn On via front panel
67 Manual Turn Off Manual Turn Off via front panel
68 EPO Emergency Power Off
69 Transfer Confirm Interrupted Transfer Confirm
70 Transfer Cancel Interrupted Transfer is cancel
Table 8 UPS status messages (continued)
No. Event Message Description / Suggested Action (if any)
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