Taylor-Dunn B0-248-TT, Operation, T Roubleshooting And Replacement Parts Manual, Page: 135 / 204

Electrical Troubleshooting
Signet Charger Troubleshooting
Page 3
OPERATING INSTRUCTIONS AND THEORY OF OPERATION
The model HBS 600W
®
and HBS 1000W
®
chargers are designed as automatic chargers. The charger turns
itself on when it is plugged into the wall outlet and turns off when the batteries are fully charged. Once the
charging cycle is complete, the charger will monitor the battery voltage. If the battery voltage drops below a
specific value (V2), the charger will turn on again for a short cycle.
Both the HBS 600W
®
and HBS 1000W
®
are two stage chargers. The first stage is a constant current mode. It
Maintains a constant current until the battery reaches a terminal voltage (V1) and then switches to the second
stage, constant voltage. At the second stage the charger decreases the charger current while holding the
batteries at the terminal voltage until the charging cycle is complete. The charging cycle is complete when the
current is down to A1
On the charger face plate, there is a status light panel that displays the current status of the charger.
The first light ( POWER ) should be ON when the AC cord is connected to a proper AC power source.
The three STATUS lights will indicate the current charging condition as follows:
Left: Charge cycle is ON and is in constant current mode.
Left & Middle (80%): Charge cycle is ON and is in constant voltage mode.
Right (100%): Charge cycle completed.
The FAULT light will turn ON and flash a fault code only when an abnormal charging condition has occurred.
Refer to the fault code table for more information.
NOTE: Critical faults will be accompanied with an audible beeping.
Typical specification plate
(reference only, specifications will vary for different chargers)