Manual Chapter 5

9-18 System Maintenance and Troubleshooting
Note
After power has been applied to the charger and the sensor
head have been placed in it, if none of the LED's for that sensor
head are lit then the contact between the sensor head and
charger may not be sufficient enough to charge the batteries.
No LED's lit indicates a “no battery present” state. If this
occurs, remove the sensor head from the charger and try
reseating it back into the charger.
Note
After a charging cycle has begun, if that charging cycle is inter-
rupted (e.g. disconnecting the power to the charger or
removing the sensor head from the charger) the charging pro-
cess described above begins again from the beginning. There-
fore, if the charger cycle is interrupted while the “Fast” charge
mode is in progress then the charger will then automatically
begin trickle charging after “Pending.”
“Pending LED” will light momentarily and switch into FAST charge.
Charge time for a fully discharged set of batteries is 15 minutes. The beeper
will sound when both heads are charged (90%) and have switched to
TRICKLE charge. To avoid the NiCad battery memory concern, use the
DISCHARGE mode when you have more than 20 minutes to charge the
sensor head batteries.