Maintenance
Copyright © 2019 Eaton Corporation. All Rights Reserved.
IPN March 2019
123
Problem Possible Cause Required Action
EFX48 display is off but
LEDs are on and rectifiers or
strings are supplying power
The display has been set to time
out after a period of inactivity
on the MMI and turn itself off
If required change the display settings
˅ Settings ˅ Display ˅ Timeout ˅
The system bus voltage is below
the level at which the display
turns on.
Check that the rectifiers are on and the
system bus voltage is > 37V
String fail Alarm The Battery Mid-point
Monitoring system has detected
a voltage imbalance in one of
the battery strings.
See Battery Mid-point Monitoring on
page 94.
A Battery Mid-point Monitoring
sense wire is disconnected.
Check the sense wires.
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