Troubleshooting the EnterprisePlus Series UPS

View EnterprisePlus UPS User's Manual

Symptom Possible Cause What to do
UPS will not turn onOn /Off /Test button not pushedPress and release the On/Off/ Test button to start UPS
UPS operates in battery mode only, even though there is normal AC presentInput AC circuit breaker is trippedReset circuit breaker by pressing the plunger back in. If the AC circuit breaker trips after UPS starts up, reduce the load on the UPS
Fault LED is illuminatedUPS has detected an internal faultCall for service
Site Wiring Fault LED is illuminatedIncorrect service wiringHave a Qualified Electrician correct the service wiring
The AC normal LED is illuminated, but there is no out- putThe UPS is being controlled via its communications portDisconnect the computer cable from the UPS and press the On button. If UPS works normally, the software has control of the UPS
UPS does not provide expected runtimeThe batteries may be weak or at the end of useful service lifeCharge the batteries for 8- hours and retest. If the runtime is still less than expected, the batteries may need to be replaced, even though the Weak/Bad Battery LED is not illuminated
Weak/Bad Battery LED is illuminatedLoose connections at the batteries, Weak batteries, Bad batteriesCheck battery connections, charge the batteries for 8- hours, replace the batteries
UPS occasionally emits a beepNormal operationThe UPS is performing its intended function
Overload LED is illuminated and a constant alarmThe load has exceeded the UPS's capacityCheck the specifications (see section 8 in user's manual). Remove part of the load
The Boost LED or Buck LED is blink- ing.The UPS is in either the Boost mode or the Buck modeThe UPS is performing its intended function


Troubleshooting the EnterprisePlus Series UPS

View EnterprisePlus Battery Pack User's Manual

Symptom Possible Cause What to do
The Charger Active LED is not on.1. The input power cord is not plugged into the AC wall outlet.
2. No commercial power available.
3. No AC voltage at the AC wall outlet.
4. Internal charger fault.
1. Plug the input power cord into the AC wall outlet.
2. Once commercial power is available recheck the LED.
3. Check the circuit breaker at the service panel to see if it is tripped.
4. Call for Service.
The DC Breaker On LED is not on.1. The DC circuit breaker is in the Off position.
2. The DC circuit breaker is tripped.
3. The internal battery wires are disconnected.
4. Internal fault.
1. Turn the DC circuit breaker to the On position.
2. Reset the DC circuit breaker.
3. Reconnect the internal battery wires.
4. Call for Service.
The charger is not providing the correct charge voltage.1. The input power cord is not plugged into the AC wall outlet.
2. The dipswitch is not set to the correct input voltage.
3. The charger has an internal fault.
1. Plug the input power cord into the AC wall outlet.
2. Set the dipswitch to the correct setting.
3. Call for Service.
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