Section III
Operation
Page 3.14
BP
II S, 3.00
08/96
Table 3–2. Alarm History Messages and Descriptions with Corrective Actions (continued)
Screen Message
Corrective Action
Description
rct bln fus
Rectifier fuse blown
Test/replace rectifier fuses
rct pwr fail
Rectifier power supply failure
Test/replace rectifier drive boards
rct pwr norm
∗
Rectifier power normal
No action required
rct lock
∗
Rectifier phase locked
No action required
rct not lock
Rectifier not phase locked
Verify UPS input voltage and
frequency.
rct cur limt
Rectifier current limit
Reduce load on UPS output.
rct cur aval
∗
Rectifier current not available
No action required
rct on gen
∗
Rectifier on generator
No action required
rct in rechg
∗
Rectifier in recharge mode (battery
being recharged)
No action required
rct in float
∗
Rectifier in float (battery is
recharged)
No action required
bat volt low
Battery voltage low (LED warning
also)
UPS will shut down in a few
minutes. Initiate shutdown of critical
loads
inv fus norm
∗
Inverter fuse normal
No action required
inv bln fus
Inverter fuse blown
Test/replace dc booster inverter
fuses
inv ps fail
Power supply failure
Test/replace inverter drive/power
assemblies.
inv ps norml
∗
Power supply normal
No action required
inv locked
∗
Inverter phase locked
No action required
inv not lock
Inverter not phase locked
Verify UPS input voltage and
frequency.
boost fail
DC booster failure
Test/replace dc booster drive/power
assembly
boost normal
∗
DC booster normal
No action required
inv ovr tmpA
Inverter over temperature.
Verify cooling fans are operating on
power assembly.
inv norm tmp
∗
Inverter temperature normal
No action required
inv cur norm
∗
Inverter current normal
No action required
inv OC shtdn
Inverter shutdown – over current
Remove some of the load
inv OT shtdn
Inverter shutdown – over
temperature
Room is too hot or fan failure
inv cur limt
Inverter current limit
Reduce load on UPS
* – Not an alarm condition.
(continued next page)