Emerson Remote Monitoring Panel Manuale Utente

Refer to Table 13 for descriptions of events and alarms.

Inverter Comm. Fail

Internal RS485 communication failure between monitor and inverter

Rectifier Comm. Fail

Internal RS485 communication failure between monitor and rectifier

Parallel Comm. Fail

The CAN communication between different UPSs within a parallel system fails.

1. Check if there are some UPSs not powered on in the parallel system. If so, power on these 

UPSs and check if the alarm disappears.

2. Press Fault Clear push button.

Battery Overtemp.

The Battery temperature is over limit. Check the battery temperature and ventilation

Ambient Overtemp.

The Ambient temperature is over limit. Check the ventilation of UPS room.

Battery Fault

Battery detected faulty (Reserved)

Replace Battery 

Battery test failed, Battery should be replaced.

Battery Low Pre-warning

Before the end of discharge, battery undervoltage pre-warning should occur. After this pre-

warning, battery should have the capacity for 3 minutes discharging with full load. The time is 

user-configured from 3 to 60 minutes.

Shut down the load in time.

Battery End of Discharge

Inverter turned off due to low battery voltage. Check the utility failure and try to recover it.

Mains Volt. Abnormal

Mains Voltage exceeds the upper or lower limit and results in rectifier shutdown.

Check the input line-to-neutral voltage amplitude of rectifier.

Mains Undervoltage

Mains Voltage is undervoltage with derated load.

Check the input line-to-line voltage amplitude of rectifier

Mains Freq. Abnormal

Mains frequency is out of limit range and results in rectifier shutdown.

Check the rectifier’s input voltage frequency

Rectifier Fault

Rectifier detected faulty. Rectifier shuts down. Battery discharges.

Rectifier Overtemp.

The temperature of heat sink is too high to keep the rectifier running.

The UPS can recover automatically. Check the environment and ventilation.

Batt. Contactor Fail

Battery contactor or circuit breaker not responding to control signals.

Batt. Charger Fault

The voltage of the battery charger is too high.

Control Power 1 Fail

UPS operates but Redundant Control Power is not available.

Mains Phase Reversed

AC Input phase sequence is reversed.

Rectifier Overcurrent

Rectifier is overloaded.

Soft Start Fail

Rectifier could not start due to low DC bus voltage 

Bypass Unable to Trace

This alarm is triggered by an inverter software routine when the amplitude or frequency of 

bypass voltage is beyond the normal range.

The amplitude threshold is fixed for positive and negative 10% rating.

This alarm automatically resets once the bypass voltage goes normal.

1. First verify that the bypass voltage and frequency displayed on the panel is within the 

selected range. Note here the rated voltage and frequency are specified by “Output voltage 

level” and “Output frequency level” respectively.

2. If the displayed voltage is believed to be abnormal, then verify the bypass voltage and 

frequency presented to the UPS. Check the external supply if it is found to be faulty.

Bypass Abnormal

This alarm is triggered by an inverter software routine when the amplitude or frequency of 

bypass voltage exceeds the limit.

This alarm automatically resets once the bypass voltage goes normal.

First check if there are some relevant alarms such as “Bypass disconnect open”, “Bypass phase 

reverse” and “Mains neutral lost”. If they appear, solve them first.

1. Then verify that the bypass voltage and frequency displayed on the panel is within the bypass 

limit. Note here the rated voltage and frequency are specified by “Output voltage level” and 

“Output frequency level” respectively.

2. If the displayed voltage is believed to be abnormal, then verify the bypass voltage and 

frequency presented to the UPS. Check the external bypass supply if it is found to be faulty. If 

the utility is likely to trigger this alarm frequently, the bypass limit can be changed a little larger 

through the configuration software according to the customer’s agreement.