SENS MicroGenius S2/S4 Technical Manual
61
AC LED DC LED Symptom
Possible Causes
Recommended Actions
LLOW
temperatures
temperature is lowered.
*SOLID
GREEN
DOUBLE
FLASH
YELLOW
AC good, load share fail
1.
Charger output settings do not
match between chargers
1.
Check that individual charger settings are identical.
Adjust as required. After making any adjustments,
unplug and re-plug SENSbus cable from charger.
*SOLID
GREEN
DOUBLE
FLASH
RED
AC good, output disabled
1.
Negative DC connection is
broken to one of the chargers
2.
Too many devices on the
SENSbus network
1.
Check that the negative DC connection is made
and that connection is tight.
2.
If step 1 doesn’t resolve issue, look for break in the
DC ground cable.
3.
If steps 1 and 2 don’t resolve the issue, ensure that
less than max allowed number of devices is on the
SENSbus.
4.
If none of the above steps resolved the issue, a
failed display board is likely, replace display board.
SOLID
RED
SOLID
GREEN
AC fail, battery voltage good
1.
Proper AC voltages or frequency
not applied
2.
Charger module failure
1.
Using a voltmeter, check that AC input voltage and
frequency at AC input terminal block/breaker are
in the range 80VAC – 264VAC / 47Hz – 63Hz.
Correct charger AC input voltage as required
2.
If step 1 doesn’t resolve issue, a charger module
failure is the likely cause. Replace module.
SOLID
RED
SOLID
YELLOW
AC fail, high battery voltage
1.
Proper AC voltages or frequency
not applied
2.
Charger module failure
And
3.
Alarm setpoint incorrect for
application
4.
DC voltage is high due to an
external source such as an
alternator
AC LED
1.
Using a voltmeter, check that AC input voltage and
frequency at AC input terminal block/breaker are
in the range 80VAC – 264VAC / 47Hz – 63Hz or
that > 8VDC is present at DC output terminal
block/breaker and that the DC polarity is correct.
Correct charger AC input and DC output voltage as
required.
2.
If step 1 doesn’t resolve RED AC light, remove both
AC and DC power for 1 minute, then reapply
power.
3.
If steps 1 and 2 don’t resolve RED AC light, a
charger module failure is the likely cause. Replace
module.
DC LED
4.
Check that charger battery settings and alarms are
set appropriately for the application and battery
under charge.
5.
If settings and alarms are correct, check and
correct battery / load voltage (consider battery
surface charge, alternator, and any connected
equipment).
SOLID
RED
SOLID
YELLOW
AC fail, low battery voltage
1.
Proper AC voltages or frequency
not applied
2.
Charger module failure
And
3.
Alarm setpoint incorrect for
application
4.
Battery discharged or defective
AC LED
1.
Using a voltmeter, check that AC input voltage and
frequency at AC input terminal block/breaker are
in the range 80VAC – 264VAC / 47Hz – 63Hz or
that > 8VDC is present at DC output terminal
block/breaker and that the DC polarity is correct.
Correct charger AC input and DC output voltage as
required.
2.
If step 1 doesn’t resolve RED AC light, remove both
AC and DC power for 1 minute, then reapply
power.
3.
If steps 1 and 2 don’t resolve RED AC light, a
charger module failure is the likely cause. Replace
module.
DC LED
4.
Check that charger battery settings and alarms are
set appropriately for the application and battery
under charge.
5.
If settings and alarms are correct, check and
correct battery / load voltage (consider loads and
any connected equipment).
6.
If fault remains after the above steps, check
battery health. Replace battery if weak.
SOLID
RED
SOLID
RED
AC fail, charger fail or
overvoltage shutdown
1.
Charger is in a fault state
2.
Charger module failure
AC LED
1.
Using a voltmeter, check that AC input voltage
and frequency at AC input terminal block/breaker
