Charger Trouble Codes
Under normal charge circumstances, the L.E.D.s operate as follows:
• Power On (Red) Illuminates continuously when AC power is present.
• Abnormal Shutdown (Red) Normally not illuminated.
• Detection Error (Red) If connected to A.C. Power, but not connected to a battery pack, or
battery pack is discharged to near 0V, L.E.D. will illuminate to indicate
the charger cannot “See” a battery connected. Check for a blown fuse
in the charger harness or a bad connection.
• Charging (Yellow) Charge Status Indicator - it flashes or illuminates during the 5-Stage
Charge Process.
• Charged (Green) Illuminates continuously during the 4th Stage of the Charge Process.
Flashing L.E.D.s
Condition Power Shutdown Detection What to look for
Battery Voltage High Off Off Flash Charger’s DC cord set possibly connected to
a battery pack with voltage higher than the
output rating of the charger.
Battery Polarity Reversed Off Flash Off Check output connector and ensure proper
polarity. Remake connections. Check the
battery connections.
Output Overload Off Flash Flash Heavy current draw, check for a short.
Charge Level Unbalanced Flash Off Off Caused by unbalanced battery condition.
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 service manual for
instructions on servicing the battery pack.
Excessive Charging Time Flash Off Flash Occurs when charging took too long. Possi-
ble 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 conditions, etc.
Excessive Overload Flash Flash Off In the unlikely event that a heavy load is
placed across the battery pack while the
charger is trying to charge the battery, and
the charger cannot keep up with supplying
energy to both the battery and the load, then
the battery voltage will decrease. Further
charging is terminated.
Excessive Discharged Flash Flash Flash This error is only generated by a condition
found during the Pre-Qualification Test
Stage. If a severely discharged battery pack
did not charge up to 42v within 5 hrs, this
error occurs.
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