Valid from serial number T-code
713962- 403-414, 669-671, 716-718
Order number Date
218920-040 2005-06-01
© BT Europe AB Service Manual REFLEX RR B/E, RR B/E CC 38- 3
Battery charger – 8340
Functional description
Abnormal events during charging are registered, one or more LEDs
flash and an error message is displayed. Important information about
the charging process is stored, if a power failure occurs. Charging
takes place from the right level when the mains power is restored.
When the computer has calculated the correct recharge level based on
the collected measurement data the yellow LED lights until the battery
is fully charged. Charging is switched off and the green LED lights.
When the battery voltage has fallen to the set value (normally 2.17 V/
cell) a maintenance charging pulse is started and runs for two minutes.
The time between two pulses is never less than 30 minutes irrespec
-
tive of the battery voltage.
Gathered measurement data is stored in a non volatile memory. This
data can be read off on the display at any time by using the keyboard.
NOTE:
Old values are written over during a new charging process.
38.3.3 Shutdown conditions
The most important demand on the charger’s function is that shutdown
takes place when the battery has received the correct charge. BTM has
parallel running shutdown programs. The program monitors that the
correct ampere-hours are charged.
38.3.4 Delayed power on and charging
There are two functions to delay the start of the charger.
The first can be programmed from 0–31 seconds and is activated each
time the charger starts. Some program versions show the remaining
time on the display. This function prevents several chargers restarting,
if a power failure occurs during charging, simultaneously resulting is a
fuse blowing.
The other can be programmed between 0–7 hours and is activated only
with a new charging process. Some program versions show the
remaining time on the display. This function makes it possible to charge
the battery during off peak periods.
38.3.5 Extra charging
The function is only available in program version 1.19 or later.
The function restarts the charger after a programmable number of
hours, at least six hours after the start of a new charging process. Extra
charging acts as if a battery change has taken place and is intended to
give a fresher battery after a weekend.
Example: The battery is put on charge on Friday at 5.00 p.m. and the
extra charge starts after 56 hours, default value, at 1.00 a.m. on Mon
-
day morning. The function shuts down automatically when the battery
is fully charged.
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