Yale MPB040E Manual page 76

Battery Charger (Accusense
LEDs Frozen (no activity) or Charger seems inop-
erable: Battery may have been subjected to an Over-
Discharge condition. Using a voltmeter check if bat-
tery voltage is well under its 100% depth of discharge
level defined as 1.75V per cell for lead acid batteries.
For example, if a 24V lead acid battery measures well
under 21V, then this condition may have occurred as
a result of batteries left in lengthy storage without a
trickle charge applied to it. Try removing the output
leads from the battery pack (while A.C. Power is dis-
connected from the charger) and reconnecting the
output leads.
Battery Voltage High: Charger's DC cord set possi-
bly connected to a battery pack with voltage higher
than the output rating of the charger.
Battery Pack Unbalanced: Caused by unbalanced
battery condition and or excessive battery plate sul-
phation. 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.
Excessive Charging Time: Occurs when charging
took too long. Possible causes include: use of a bat-
tery 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.
Battery Testing: This error is only generated by one
of two conditions found during the Pre-Qualification
Test Stage. Condition 1: A severely discharged bat-
tery pack did not charge up to 1.75Vdc per cell
( 21Vdc for 24V-battery ), within 4 hrs. Condition 2: A
heavy load applied prevents charger from charging
battery pack above 1.75Vdc per cell.
Inhibit Lockout Control Defective: If an Equipment
Lockout Cable (Inhibit) is installed and supposed to
be active, but it is not. Check Inhibit vehicle wiring. If
correct, internal inhibit switch may have been over-
load. Contact factory.
52
®
20A)
Internal Over Temperature: Charger shut down due
to an internal over temperature condition. Check fan
operation and remove blockages, if any.
Mode Selected Empty: The selected Charge Algo-
rithm, set via the dip switches, is empty and not a
valid setting for charging batteries. Reset the mode
select switches to a valid value.
Database Write Error: While disconnecting the
charger output leads from a battery pack, if the
charger was in the process of saving information back
into memory, this error may be produced. Contact the
factory to have a reset programming cable sent to you
to field reset the charger.
Discharge Error: Based on 1.75V/cell, this error is
produced when cell voltage falls below this value (ex-
ample: 21Vdc for 24V Battery Pack). A.C. Power
should be connected to charger and charging initiated
immediately.
Severe Discharge Error: Based on 1.417V/cell, this
error is produced when cell voltage falls below this
value (example: 17Vdc for 24V Battery Pack). A.C.
Power should be connected to charger and charging
initiated immediately. Damage to battery pack, result-
ing in reduced capacity, may have occurred and may
be permanent. Check battery with Load Tester after
re-charge complete.
Battery Storage Error: Battery has sat in storage for
greater than 30 days and requires charging. Connect
A.C. Power and Charge Battery.
Critical Battery Error: Battery has drained to a criti-
cally low level possibly resulting from many months of
storage, parasitic drains including equipment key left
in 'ON' position. Disconnect the charger's positive bat-
tery lead, wait a few seconds and then reconnect the
lead.
2200 YRM 1007