User's Manual
Specifications are subject to change. See bluesea.com/P12 for current information.
20
Alert Screens and Diagnostics
If at any time during the chargers life the red Alert light goes on, then the charger is not providing optimal performance.
The below Alerts encompass all of the possibilities for the charger to under perform. Alerts will be indicated by the red
Alert light as well as a pop-up screen explaining the reason.
Reverse Polarity or Short Circuit
The P12 Battery Charger has the ability to determine if batteries are incorrectly connected to the charger. Upon
supplying AC power to the charger if a reverse polarity or short circuit situation exists the Reverse Polarity or Short
Circuit Screen will be displayed. Shut off AC power and correct the connection issue. Once corrected, turn on AC
power and attempt to use the battery charger as normal. If no alert screen displays then the charger is
fully operational.
WARNING
If AC power is being supplied to the battery charger and batteries are connected incorrectly (reverse polarity or
short circuit), damage will occur to the internals of the battery charger. This will render the battery charger
non-operational. Never make connections while AC power is supplied to the battery charger. Personal and property damage may occur and the chargers warranty will be void.
Thermal Regulation
The P12 Battery Charger is equipped with an intelligent thermal regulation device for safe charging. If at any point
during charging a thermometer image begins to blink in the upper right hand corner of the screen, then the charger
has entered Thermal Regulation. This is not a failure, but a reduced current output state. While in this state the
internal temperature is being regulated by controlling the maximum output current. The maximum output current will
appear at the bottom of the Charger Summary Screen indicating the total amount of current available to supply all
outputs. While in Thermal Regulation, the charger will reduce output current to keep the charger at a safe operating
temperature. The output can be regulated all the way down to zero but is not likely. The most common correction for
this state is to increase the fan speed to High. If the fan speed is already set to High check for blockage around the
fan vent that can be removed. If the condition persists, it is advisable to reposition the battery charger in a cooler,
more ventilated location.
Fan
The P12 Battery Charger is equipped with a variable speed fan. The fan is used to dissipate warm air produced from
high output currents during charging. The aluminum case of the P12 Battery Charger provides a large amount of heat
dissipation but for optimal performance the fan must be performing properly. If at any point the fan fails to perform
at its designated setting the Fan Alert Screen will appear. If this alert screen appears shut off AC power to the
battery charger as well as all battery connections. Determine if there is a blockage in or around the fan vent and
correct. Turn on AC power and check to see if the Fan Alert Screen appears. If the Fan Alert Screen does not appear
and the fan seems to be operating correctly, then continue to use the battery charger normally. If the Fan Alert
Screen appears contact Blue Sea Systems for fan replacement instructions.
Fan Fault
Check Fan for Blockage
Battery Temperature Sensor
As discussed in the Temperature Parameters section (page 15), there is an external battery temperature sensor
supplied with the unit. If at any point the temperature sensor records a temperature beyond the defined temperature
limits, the battery charger will display the Battery Temperature Alert Screen. In this situation all battery charging will
stop until the proper battery temperature is restored. Normal operation will not commence unless two degrees within
the temperature parameters. For example, if the maximum temperature parameter is set to 50°C and the
temperature sensor reads 51°C then the Battery Temperature Alert Screen will display. In this situation the battery
charger will not charge until the battery temperature sensor reads a maximum of 48°C. If no temperature sensor is
in use then battery temperature is not monitored and this alert will not be displayed.
CAUTION
Alteration of battery temperature parameters without sufficient knowledge is dangerous and can cause personal or property harm. If the battery temperature sensor goes
outside a designated parameter, contact your battery manufacturer for further information on specific battery temperatures.
Battery Temperature
Out of Limits
Internal Temperature Sensor
The P12 Battery Charger is equipped with two internal temperature sensors. These sensors are unrelated to the
supplied external battery temperature sensor. If the Internal Temperature Sensor Alert Screen appears, then one
or more of the internal temperature sensors is not recording correct temperature data. Once in this state all battery
charging will stop. This form of temperature alert can not be corrected by the user. Contact Blue Sea Systems for
further information regarding internal temperature sensor alerts.
Internal Temp Below -20° C
Charger Will Restart When
Internal Temp Above -18° C
Reverse Polarity or Short
Turn Off AC Power
Check DC Connections
P12
7521 AND 7522 BATTERY CHARGERS