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B5-440-36 / B5-440-48 / B5-540-48XL / BF-030-48Operator Manual
MB-440-07
Diagnostic Fault Codes
If the fault LED is on or flashing then a fault has occurred. The status of the three lamps indicate
a fault code. Note: “Slow Flash” = about once per second.
Fault
Lamp
Status
Lamp
LED 3
Condition
Slow Flash
ON
ON
Not a valid code for Taylor-Dunn charging systems
Slow Flash
OFF
ON
Charger overheated
Slow Flash
ON
OFF
Low battery voltage. Must be > 10 volts to start.
Slow Flash
OFF
OFF
AC power interrupted during charge cycle. Will restart when
AC power restored
Slow Flash
ON
Slow Flash Faulty charger
Slow Flash Slow Flash
OFF
Faulty charger
Slow Flash Slow Flash
ON
Faulty charger
Fast Flash
-
-
Faulty charger
ON
OFF
OFF
Charge time too long during one of the phases. Likely faulty
batteries or batteries too large.
ON
OFF
Slow Flash Maximum voltage was achieved. Possible faulty or wrong bat-
teries installed
ON
OFF
ON
Minimum voltage was NOT achieved. Likely faulty batteries
ON
Slow Flash
OFF
Maximum power (Amp hours) for charge cycle was exceeded.
Likely faulty batteries or batteries too large.
ON
Slow Flash Slow Flash Maximum time for charge cycle was exceeded. Likely faulty
batteries or batteries too large.