EFX48-xx Series with RM3-340/440 Installation and Operation Guide
122
Copyright © 2019 Eaton Corporation. All Rights Reserved.
IPN March 2019
Problem Possible Cause Required Action
High system output voltage. Temperature Compensation is
active and the battery
temperature is below the
reference temperature.
None. This is normal operation (if
batteries are connected). Disable
Temperature Compensation if no
batteries connected.
Equalise or Fast Charge is
active.
None. Output voltage will return to
normal when Equalise or Fast Charge is
completed.
Incorrect float voltage setting in
EFX48.
Correct the float voltage setting of the
EFX48.
Record new setting.
Faulty rectifier. Locate the rectifier with the highest
output current and remove this one first.
If this rectifier is not faulty then replace
and remove the other one instead. (The
output voltage returns to normal when
faulty rectifier is removed.)
Replace faulty rectifier with one that is
working.
Return the faulty rectifier for service.
EFX48 red alarm LED on The EFX48 has reported an
alarm condition for one of the
alarms enabled in its
configuration
Use the navigation switch and go to
˅ A larms ˅ A ctive ˅
to check which alarms are active. For
more information about individual
alarms see page 112.
EFX48 alarm sounding The EFX48 has reported an
alarm condition for one of the
alarms enabled in its
configuration
Use the navigation switch and go to
˅ A larms ˅ A ctive ˅
to check which alarms are active. For
more information about individual
alarms see page 112.
EFX48 string LED flashing
slowly (1Hz)
The string is commanded to
turn on but the EFX48 has
determined that the operating
conditions are not correct and is
taking action to connect the
string
None – wait for string to connect
EFX48 string LED flashing
fast (4Hz)
The string has tripped due to an
over current condition
Turn the string off and on again – it may
go into the pending state (LED flashing at
1Hz) before turning back on
EFX48 load output LED
flashing slowly (1Hz)
The load output is commanded
to turn on but the EFX48 has
determined that the operating
conditions are not correct and is
taking action to connect the load
None – wait for load to connect
EFX48 load output LED
flashing fast (4Hz)
The load has tripped due to an
over current condition
Turn the load off and on again – it may
go into the pending state (LED flashing at
1Hz) before turning back on
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