Uninterruptible Power Supply (UPS) Troubleshooting

Alarm or Condition Possible Cause Action

On Battery

LED is on.

1 beep every 5 seconds

 A utility failure has occurred and the UPS is in Battery mode. The UPS is powering the equipment with battery power. Prepare your equipment for shutdown.

Battery Low

LED is flashing slowly.

1 beep every second.

 The UPS is in Battery mode and the battery is running low. This warning is approximate, and the actual time to shutdown may vary significantly. Depending on the UPS load and number of Extended Battery Modules (EBMs), the Battery Low warning may occur before the batteries reach 25% capacity. See Table 23 on page 88 of the User's Guide for estimated runtimes.

On Bypass

LED is on.

1 beep every 5 seconds.

 The UPS is in Bypass mode. the equipment transferred to bypass utility power. Battery mode is not available and your equipment is not protected; however, the utility power continues to be passively filtered by the UPS. Check for one of the following alarms: overtemperature, overload, or UPS failure.

On Bypass

LED is on.

No beeping.

 The UPS is on bypass while operating on the High Efficiency setting. The equipment transferred to bypass utility power as a normal function of High Efficiency operation. Battery mode is available and your equipment is protected.

Batteries Disconnected

LED is on.

1 beep every second.

 The UPS does not recognize the internal batteries. If the condition persists, contact your service representative.

Overload

LED is on.

1 beep every second.

 Power requirements exceed UPS capacity (greater than 100% of nominal. See page 84 of the User's Guide for specific output overload ranges. Remove some of the equipment from the UPS. The UPS continues to operate, but may switch to Bypass mode or shut down if the load increases. The alarm resets when the condition becomes inactive.

Overtemperature

LED is on.

1 beep every second

 The UPS internal temperature is too high or a fan has failed. At the warning level, the UPS generates the alarm but remains in the current operating state. If the temperature rises another 10 °C, the UPS transfers to Bypass mode or shuts down if Bypass is unusable.

If the UPS transferred to Bypass mode, the UPS will return to normal operation when the temperature drops 5 °C below the warning level.

If the condition persists, shut down the UPS. Clear vents and remove any heat sources. Allow the UPS to cool. Ensure that the airflow around the UPS is not restricted. Restart the UPS.

If the condition continues to persist, contact your service representative.

Battery Overvoltage

LED is on.

1 beep every second.

 The UPS battery voltage is too high. The UPS turns off the charger until the next power recycle. Contact your service representative.

Site Wiring Fault

LED is on.

1 beep every second.

 L Models Only—Ground wire connection does not exist, or the line and neutral wires are reversed in the wall outlet. Have a qualified electrician correct the wiring.
  G Models Only—Input is phase to phase (neutral is not bonded to ground). Disable the Site Wiring Fault Alarm setting (see page 40 in the User's Guide).
  i and G (AU) Models Only—The polarity of the UPS input power cord connector is incorrect. Rotate the Schuko input connector.
  i and G (AU) Models Only—The ground wire connection does not exist. Have a qualified electrician correct the wiring. If the UPS is installed to input supply without ground, disable the Site Wiring Fault Alarm setting (see page 40 in the User's Guide).
The UPS does not provide the expected backup time. The batteries need charging or service. Apply utility power for 48 hours to charge the batteries. If the condition persists, contact your service representative.
Power is not available at the UPS output receptacles. The UPS is in Standby mode. Supply power to the connected equipment. Press the On/Off button for at least 1 second, until the front panel displays UPS starting.
The UPS does not start. The power cord is not connected correctly. Check the power cord connections.
  The Remote Emergency Power-off (REPO) switch is active or the REPO connector is missing. If the UPS Status menu displays the Remove Emergency Power Off notice, inactivate the REPO input.
The UPS operates normally, but some or all of the protected equipment is not on. The equipment is not connected correctly to the UPS.

Verify that the equipment is plugged into the UPS receptacles.
Battery test did not run or was interrupted. One of the conditions listed in Running Automatic Battery Tests on page 52 of the User's Guide was not present.

Resolve the condition, then restart the test.
The UPS does not transfer to Bypass mode. The bypass utility does not qualify. Check the bypass utility. The UPS is receiving bypass utility power that may be unstable or in brownout conditions.
  Bypass mode is disabled. Check that the Bypass settings are configured correctly. See Configuring Bypass Settings on page 48 of the User's Guide.
USB communication does not work. The serial port communication speed is set incorrectly for USB. USB requires 9600 bps. Check that the Serial Port Configuration setting is set to 9600 bps (see User Settings on page 40 of the User's Guide).