La Marche A75R Installation And Operation Manual - page 11
7
3
Status and Alarm Indicators
The A75R front panel has six LED indicators as well as a three digit seven segment LED display. Additionally
there is a analog DC ammeter for the output current.
Figure 7 - Status and Alarm Indicators
Current Limit
– This Red LED indicator illuminates when the charger output reaches the set maximum output
current and stays on until the battery is partially charged and the output current has fallen.
Temp. Comp. Disable
– This Red LED indicator illuminates if the internal temperature compensation switch is
in the disable position and there is no external probe connected.
AC On
– This Green LED indicator illuminates to indicate the correct AC voltage is present.
Nickel Cadmium
– This Yellow LED indicator illuminates to indicate that the Nickel Cadmium battery type is
selected.
Lead Acid
– This Yellow LED indicator illuminates to indicate that the Lead Acid battery type is selected.
Charger Fail
– This red LED indicator illuminates to indicate rectifier failure.
3.1
Charger Fail Alarm Operation
The Charger Fail Alarm will trigger if the charger is not able to regulate the output voltage. The Charger Fail
Alarm will also indicate if the AC power is removed (and DC power remains). The Charger Fail alarm is a
latching alarm and will not clear until the AC power is cycled off and on.
3.3
Remote Shutdown Operation
The remote shutdown feature allows the user to check the battery without disconnecting it from the charger.
The remote shutdown terminals allow for a bipolar input, when a ±12-24VDC signal is applied to these
terminals, the charger output voltage will drop to approximately 10.5VDC (21VDC for 24V chargers).