15/11/2025
That is a three-phase in, three-phase out (3P-3P) UPS, and the specific model series is usually important for the exact fault codes.
The common three-phase BPE models in the 10 kVA range (like the GTP Series or CP Series) use an "Er" code system.
Here is a comprehensive list of the BPE UPS Error Codes (ErXX) that apply to many of their 3-Phase models, including common ones for multi-phase systems:
⚠️ BPE 3P-3P UPS Fault Code List
| Code | Explanation | Probable Cause & Recommended Action |
|---|---|---|
| Er01 | DC BUS Pre-charge Abnormal | DC Bus capacitor pre-charge failure or Battery Fuse failure. Action: Check battery/DC bus connections and fuse. |
| Er04 | Inverter Failure | Inverter circuit out of order. Action: Requires technical service; contact BPE support. |
| Er06 | Output Short Circuit | Short circuit detected at the output terminals. Action: Disconnect the load, check wiring for shorts, and restart the UPS. |
| Er07 | EPO Mode | Emergency Power Off switch is activated. Action: Check if the EPO switch is pressed, reset it, and restart the UPS. |
| Er08 | DC Bus High Voltage | DC Bus voltage level is abnormally high. Action: Technical service is required. |
| Er09 | DC Bus Low Voltage | DC Bus voltage level is abnormally low. Action: Check battery voltage, connections, and charger circuit. |
| Er10 | Inverter Over-current | Excessive current draw from the inverter. Action: Check load for excess current, remove non-critical load, and restart. |
| Er11 | UPS Overheat | Internal temperature is too high. Action: Check ambient temperature, clear air vents, and ensure fans are working. |
| Er12 | Inverter Overload | Connected load exceeds the UPS capacity rating. Action: Reduce the connected load immediately. |
| Er13 | Charger Failure | Battery charger circuit out of order or abnormal. Action: Requires technical service. |
| Er14 | Fan Failure | One or more cooling fans have failed. Action: Inspect fans for blockage or failure, replace if necessary. |
| Er22 | Bypass/Output SCR or Fuse | Bypass SCR or Output Fuse has failed. Action: Requires technical service. |
| Er23 | Inverter Relay/SCR or Fuse | Inverter Relay or SCR or Output Fuse has failed. Action: Requires technical service. |
| Er24 | Bypass Input on CVCF | Bypass input detected while running in CVCF (Constant Voltage Constant Frequency) mode. Action: Check input source quality and settings. |
| Er26 | PFC Over-current | Power Factor Correction circuit over-current. Action: Requires technical service. |
| Er28 | Bypass Overload Timeout | Overload on bypass exceeded the time limit, and output was cut off. Action: Reduce the connected load. |
| Er30 | Inverter Balance Error | (Common in 3-Phase) Imbalance detected in the 3-Phase inverter output. Action: Requires technical service; check for phase wiring/load balance issues. |
| Er32 | Sync Signal Error | Synchronization signal error. Action: Check external sync source (if used) or input power frequency stability. |
💡 General 3P-3P Troubleshooting Steps
When a fault occurs on a 3-phase system, a few common actions can help, assuming the fault is not a critical hardware failure:
* Check the Load: Is the total connected load balanced across all three output phases and below the 10 kVA rating? An unbalanced load can cause specific errors like Er30.
* Verify Input Power: Use a multimeter to check the incoming voltage and frequency on all three phases. Any large imbalance can cause the UPS to trip.
* Perform a Cold Start: If the fault is non-critical, try turning the UPS OFF completely, waiting a minute, and then performing a Cold Start (if supported by your model) or a normal power-on sequence.
If you are seeing a specific fault code on the LCD, please share it, and I may be able to provide a more targeted remedy.
