Taylor-Dunn B0-248-TT, Operation, T Roubleshooting And Replacement Parts Manual, Page: 134 / 204

Electrical Troubleshooting
Signet Charger Troubleshooting
Page 2
TEST EQUIPMENT REQUIRED FOR TROUBLESHOOTING
Digital Multi Meter (DMM), calibrated and accurate down to 0.00001 volts.
Clamp on DC ammeter to measure up to 20-Amps.
Important Notes and Instructions
• This troubleshooting guide assumes a familiarity with the use of a digital multimeter including, voltage
tests, continuity tests and diode testing. If not familiar with any part of these tests, refer testing to a
qualified technician.
• Make sure that the AC electrical socket the charger is plugged into is in good working condition.
• Make sure that the AC voltage at the electrical socket is the same as the AC voltage on the charger
nameplate.
• Make sure the batteries are in good condition.
• If the charger exhibits intermittent problems, it must be in the failed mode for troubleshooting.
• There are no internally serviceable components in the charger. If the charger has failed then it must be
replaced.
DEFINITIONS:
Volts Per Cell = Voltage for each cell in a battery pack. for example, one 6-volt battery has 3-cells.
Term Value Condition
V1: 2.47 Volts Per Cell Flooded batteries at 80F ambient temperature*.
2.39 Volts Per Cell Gel Batteries at 80F ambient temperature*.
V2: 2.08 Volts Per Cell All batteries
A1: 5 Amps (+/- 1 Amp) All batteries
All voltages are nominal.
* - Voltages are temperature compensated.
Actual V1 = V1 + ((80 - T
A
) • T
C
) where:
T
A
= Current ambient temperature.
T
C
= 0.0028 for flooded batteries or 0.00375 for gel batteries
GEL batteries must be charged with a charger configured for
GEL batteries. Use of any other charger will result in damage
to the batteries and premature failure of the batteries.
This charger is rated for 115 VAC or 230 VAC operation
(nominal). When switching from one input voltage to the other,
wait until all LED’s are off. Switching voltage when any of the
LED’s are on will result in damage to the charger.