![](/images/new-backgrounds/1196321/19632143x1.webp)
Operation
Table 13 RMP messages (continued)
Message | Description / Suggested Action (if any) | |
| The phase sequence direction of bypass voltage is reversed. | |
| Normally, the phase of phase B lags 120 degrees behind phase A, and the phase of phase C | |
Bypass Phase Reversed | lags 120 degrees behind phase B. | |
| Verify that the phase rotation of the bypass supply presented to the UPS is correct, and rectify it | |
| if it is found to be in error | |
Load Impact Transfer | A transfer to bypass occurred due to a large step load. The UPS should recover automatically. | |
Turn on connected equipment in sequential order to reduce the step loading of the inverter. | ||
| ||
| The load is on bypass power due to excessive number of transfers that occurred within the last | |
Transfer | hour. | |
The UPS will recover automatically and will transfer the load back to inverter power within an | ||
| ||
| hour. | |
|
| |
Load Sharing Fault | UPS modules within a parallel system are not sharing the load current equally. | |
|
| |
DC Bus Abnormal | DC input voltage to inverter beyond limits. Inverter shuts down. Load transfers to bypass. | |
|
| |
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 | ||
| ||
Parallel Board Fault | Malfunction of the paralleling control circuits of this UPS module. Can cause “System Transfer” | |
to bypass. | ||
| ||
| Rectifier, inverter and battery converter were shutdown because DC bus voltage is too high. | |
DC Bus Over Voltage | Check whether there is a fault in rectifier side. If no, then check whether overload occurs. | |
| Restart the inverter after resetting the fault | |
| The parallel cables are not connected correctly in a parallel system. | |
Parallel Connect Fault | Reset the fault by pressing the “fault clear” button, then restart the inverter by pressing the | |
| “inverter on” button. | |
Bypass Over Current | Bypass current is over limit above 135% rating. The UPS just alarms and does nothing. | |
|
| |
LBS Active | Load Bus Synchronization is active. The UPS is acting as an LBS master or slave in a dual bus | |
configuration. | ||
| ||
Setting Save Error | History records not saved. (Reserved) | |
|
| |
Mains Neutral Lost | AC Input mains reference neutral not detected. | |
|
| |
Protocol version clash | Firmware incompatibility between Monitor Board and Digital Signal Processor Board. | |
|
| |
Battery ground fault | Battery leakage to ground detected (option) | |
|
| |
Inv. Turned On Manually | Manual Turn On via front panel | |
|
| |
Inv. Turned Off Manually | Manual Turn Off via front panel | |
|
| |
EPO | Emergency Power Off direct access key pressed or external command received | |
|
| |
Transfer Confirm | Prompt to press “enter” key to acknowledge that an interrupted load transfer to bypass will | |
happen. | ||
| ||
Transfer Cancel | Prompt to press “ESC” key to avoid that an interrupted load transfer to bypass will happen. | |
|
| |
Unit Off Confirm | Prompt to press “enter” key to acknowledge that the UPS will be disconnected from other | |
paralleled UPS modules. | ||
| ||
System Off Confirm | Prompt to press “enter” key to acknowledge that the all paralleled UPS will be disconnected | |
from the load. | ||
| ||
Fault Reset | Fault clear direct access key pressed | |
|
| |
Alarm Silence | Silence On/Off direct access key pressed | |
|
| |
Turn On Fail | Inverter failed to turn on when Inverter On direct access key was pressed. This may be as a | |
result of Invalid Operation (Maintenance bypass on) or DC bus or rectifier not ready. | ||
| ||
Alarm Reset | Fault clear or Silence On/Off direct access key pressed | |
|
| |
Bypass Mode | Load supplied from AC input bypass supply. | |
|
| |
Normal Mode | Load supplied from Inverter output through double conversion of the AC mains input supply. | |
|
| |
Battery Mode | Load supplied from Inverter output through double conversion of the Battery supply. | |
|
| |
Source share mode | Load supplied from Inverter output through shared double conversion of the AC mains input | |
supply and of the Battery supply. | ||
|
18