SENS MicroGenius S2/S4 Technical Manual
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Table 16 – Factory Overvoltage Shutdown Setpoints
Configuration
Code*
Battery Type
Overvoltage Shutdown Setpoint
12V
24V
GEN
AGM
17.00
34.01
FLA
17.00
34.01
NCD
17.00
34.00
HCB
17.00
34.01
Ultracapacitor
17.60
29.20
MAR
VRLA
15.18
30.36
AGM
15.41
30.82
NCD
17.00
34.00
NGN
VRLA
15.18
30.36
AGM
15.41
30.82
NCD
17.00
34.00
PSP
N/A
13.20
26.40
*Configuration Code displayed on charger label.
8.4.8.
Reverse Polarity
Indicates a battery is connected backwards. Charger output is disabled until the condition is
corrected. Activates flashing red/yellow DC LED. Alarm/communications circuit board REVERSE
POLARITY relay contacts change to Fail state after delay when alarm is assigned to relay contacts.
8.4.9.
Low Cranking Voltage
Indicates the battery voltage is likely to be inadequate to provide engine-cranking capability.
Indicates that DC output voltage during a prior cranking event dropped below default setpoint, 6V
for a 12V system and 12V for a 24V system.
This alarm is latching, and must be manually reset by
disconnecting both AC and DC power or using keypad
. Chargers intended for marine and standby
power applications are shipped with the low cranking voltage alarm disabled.
Alarm/communications circuit board LOW CRANK relay contacts change to Fail state after delay
when alarm is assigned to relay contacts.
8.4.10.
Incompatible Battery
Indicates a 12V battery is connected to a 24V charger. The charger operates for approximately 5
minutes while observing behavior of the DC voltage. If DC voltage behavior is normal the charger
will continue charging. If DC voltage behavior is abnormal, as is typical with a battery voltage
mismatch, the charger will shut down and lock off after approximately five minutes. Activates
flashing yellow DC LED. Alarm/communications circuit board INCOMPATIBLE BATTERY relay
contacts change to Fail state after delay when alarm is assigned to relay contacts. After correcting
mismatched condition cycle power to reset the charger and begin operation. See section
9.6
for
charging a very low or zero-volt battery.
8.4.11.
Invalid Settings
Indicates a charger setting is not valid. Charger output is disabled until the condition is corrected.
Activates alternating flashing yellow AC and DC LEDs. Alarm/communications circuit board
INVALID SETTINGS relay contacts change to Fail state after delay when alarm is assigned to relay
contacts.
8.4.12.
J1939 Inactive
Indicates the charger cannot access the J1939 network when configured to use J1939
communications. This will occur if the charger is not connected to a J1939 network or if the
charger cannot claim an address to use on that network. The charger will not use J1939
communications until it can acquire a network address. Alarm/communications circuit board
