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 an 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.
Ni Cad
– 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 Failure/LC Alarm
– This Red LED indicator illuminates to indicate rectifier failure. It will blink when
low output current is present.
3.1
Charger Fail Alarm Operation
The Charger Fail Alarm shares the LED indicator and the alarm relay contacts with the Low Current alarm. 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. The Alarm LED will blink in the low current
condition and will
remain solid for Charger Failure
.
The Low Current Alarm and Charger Failure Alarm share the same set of Form C contacts. The contacts will
change state under either alarm condition.
Summary of Contents for A75R
Page 13: ...9 Quick Start Guide ...
