David Clark A99-14CRG, User Manual

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19545P-98 (03-14)
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Charge Status Indication
Charge status for each battery is indicated by the LED next to each charge bay.
Table 2
below
lists each state:
Table 2
LED Description
Off Battery not present or no power to charger
Orange – Solid Charging
Green – Solid Charge Complete
Red – Flash Battery too cold (<0°C) or too warm (>45 ° C)
Error/Protection States
Li-Polymer batteries must be charged in a specific way to prevent damage or fire. The A99-
14CRG is designed to charge these batteries correctly and also monitors the temperature of
each battery to ensure safe charging.
Each battery has a thermistor inside it which allows the A99-14CRG to monitor the temperature
of the battery at all times. In addition, the A99-14CRG has a thermal monitoring device on the
circuit board. Together these devices ensure that safe conditions are maintained throughout
the charging process.
Battery too cold
If the thermistor indicates that the battery temperature is below 0°C, charging is
suspended until the temperature rises above 0°C. The LED will flash red.
Battery too warm
If the thermistor indicates that the battery temperature is above 45°C, charging is
suspended until the temperature falls below 45°C. The LED will flash red.
Internal temperature too warm
If the on-board thermal monitor indicates a high temperature, the charge rate of all four
bays is cut to 650mA. This is an attempt to prevent any further temperature rise which
could result in charging being halted completely. There is no change in LED status
indication during this condition.