Yale 524150797 Maintenance Manual page 354

Charging and Troubleshooting
Battery Over Voltage: Charger's Output DC Cable
connection is possibly connected to a battery pack
with voltage higher than the output rating of the
charger.
Battery Temperature Low / High: If an external
thermistor is connected in the application, the charger
has detected an attempt to use the battery out of its
recommended temperature range... thaw the battery if
cold or cease charging and allow battery to cool down
before attempting to restart charge.
Battery Pack Unbalanced - V: Caused by
unbalanced battery condition and or excessive battery
plate sulphation during Bulk Constant Current Stage.
Example: some batteries are at a much higher state of
charge than others. This may require replacement of
the batteries. Refer to the Equipment's Operators
manual for instructions on servicing the battery pack.
Battery Pack Unbalanced - A: Caused by an
unbalanced battery condition during Absorption
Constant Voltage Stage. Inspect each battery with a
load tester as well as observe if any battery is 'hotter'
to the touch than other batteries in the pack. The
indication is that a cell(s) within the pack may have
shorted, or experienced stratification of the electrolyte
(over-charging due to incorrect MODE setting) and
may require replacement of the batteries. Refer to the
Equipment's Operators manual for instructions on
servicing the battery pack.
Batt Is 100% Discharged: Based on 1.75Vdc / cell,
this error is produced when cell voltage falls below this
value (example: 21Vdc for 24V Battery Pack). A.C.
Power should be connected to charger and charging
initiated immediately.
Batt Emergency Under-Voltage: Based on 1.31Vdc/
cell, battery may have been subjected to an extended
Over-Discharge condition (example: 15.75Vdc for a
24V Battery Pack) and battery is in danger of
becoming damaged beyond probable repair. Using a
voltmeter check if battery voltage is well under its
100% depth of charge. Remove all loads from battery,
including charger and allow time for battery pack to
'spring' back to above 1.31V/cell. Reconnect only the
charger to battery pack and allow to charge.
Batt Beyond Over Discharged: Based on 1Vdc/cell,
battery may have been subjected to an extreme Over-
Discharge condition (example: 12Vdc for a 24V
Battery Pack) and battery damage is beyond probable
repair – expect a shortened life span for battery.
Charge will have turned off completely, to avoid adding
to the decaying process. Using a voltmeter check if
battery voltage is well under its 100% depth of charge.
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Remove all loads from battery, including charger and
allow time for battery pack to 'spring' back to above
1Vdc/cell. Reconnect only the charger to battery pack
and allow to charge.
Batt Temperature Sensor Open / Shorted: If a
Battery Temperature Sensor Cable was installed at
start of charging, but then later found to be open or
short circuited, this error is produced. Inspect
Temperature Device cable for breaks or shorts and
correct.
Batt Over-Temperature: If a Battery Temperature
Sensor Cable is installed at start of charging and a
maximum battery temperature is reached, further
charging is then terminated and an error condition is
produced. Check batteries for possible cell damage
and perform a load test on each battery.
Battery Storage Error: While equipment and battery
sits in storage for an excessive amount of time,
batteries have depleted. Charging is required
immediately. Connect Charger to A.C. Power to start
charging – error will clear.
Battery Testing Error - Sulphate / Discharged: This
error is only generated by one of two conditions found
during the Pre-Qualification-Test Charge Stage.
Sulphate: Severely Sulphate battery plates are
preventing a charge flow from increasing above a
minimum value. Disconnect and reconnect AC Power
to charger to restart this stage. If a second attempt
failed, load test each battery and replace any failed
battery. Discharged: A severely discharged battery
did not charge up to 1.75Vdc per cell ( for example –
21Vdc for 24V-battery ), within an allotted time span of
approximately 4 to 8 hours. Check for heavy loads
preventing battery from increasing charge and/or
defective batteries that will not accept a charge.
Bulk Charge Safety Time Error: Occurs during the
Bulk Charge Stage when its associated safety timer
times out AND the battery voltage was not allowed to
increase above 2.17V/cell. Possible causes include:
use of a battery load that is draining energy from the
battery while the charger is trying to charge that same
battery, aged or unbalanced battery cell conditions,
etc.
Absorption Charge Safety Time Error; Occurs
during the Absorption Charge Stage when its
associated safety timer times out AND the battery
voltage was dragged below 2.17V/cell. Possible
causes include: use of a heavy battery load that
drained energy from the battery while the charger was
trying to charge that same battery.
2240 YRM 1890