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17. Error messages and warnings
The ULTRAMAT 12 incorporates a wide range of protective and monitoring systems designed to
check the charger’s functions and monitor the state of its electronics. If any of the unit’s limit
values are exceeded, the charger responds accordingly: in some cases the unit’s settings are
automatically reduced (e.g. charge current / discharge current); in others the charge process is
switched off (e.g. car battery almost flat).
The liquid crystal screen displays the cause of the error. Most error messages are self-
explanatory, but you may find the following list useful when fault-finding. The warning message
and the audible warning signal can be switched off by pressing the „ENTER“ button.
___________ _____
___________ _____
*****ERROR******
car batt. empty
This warning message is displayed if the voltage of the car
battery falls
below the value set in the „Low voltage cut-
off“ section of the user settings (11.0 V).
If the charger detects an interruption of the connection
between battery and charger during a charge process, the
screen displays this error message. If you see this error
message when the charger is in use, it may indicate an
intermittent contact.
Note: the same error message also appears if you
deliberately interrupt the charge process, e.g. by discon-
necting the charge lead.
If the internal charge safety timer has elapsed, the current
process is terminated for safety’s sake. The safety timer is
set permanently to 180 minutes for Ni-Cd / Ni-MH batt-
eries. For Lithium batteries the set period is 180 minutes.
The timer is disabled when a lead-acid battery is being
charged. These settings are fixed, and cannot be altered.
Possible causes: charge current too low: battery cannot be
fully charged; charge leads too thin and / or too long -
charge current cannot rise high enough: battery capacity
too high.
If the charger detects an excessive voltage, e.g. incorrect
setting of the cell count with a Lithium or lead-acid battery,
this error message is displayed.
The same error message may also appear if the cells
connected to the charger are overcharged.
If the charger detects too low a voltage, e.g. incorrect
setting of the cell count with a Lithium or lead-acid battery,
this error message is displayed.
The purpose of this error message is to avoid the cells
becoming deep-discharged due to an incorrect setting.
This warning message is displayed if a battery is
connected to the unit’s charge outputs with incorrect
polarity.
When a charge or discharge program comes to an end,
the screen displays the message END, alternating with
the program name. At the same time the integral buzzer
sounds for a limited period, unless you have already
disabled it in the „Button click / buzzer“ user settings
section.
Ready message
The current input voltage can be called up at any time by
pressing the INC and DEC buttons
simultaneously
This can be very useful if you are using your car’s battery
as energy source for charging
Press any button to return to the menu system.
15. Screen displays
Battery voltage
________________
________________
CHG 12:56 00321
NC+4.50A 11,985V
Program Charge / discharge time
Charge / discharge current
Capacity
The two-line liquid-crystal screen displays in a clear form the important information generated
during the charge / discharge process. The information remains visible on-screen until you
disconnect the battery that is being charged. Once you connect another battery for charging, the
previously displayed values are erased, and cannot be called up again.
16. On-screen monitor displays
The ULTRAMAT 12 incorporates a wide range of protective and monitoring systems designed to
check the charger’s functions and monitor the state of its electronics. If any of the unit’s critical
limit values is exceeded, the charge process is switched off. Typical triggers would be excessive
voltage, excessive temperature or a depleted car battery.
If any of these problems should occur, the liquid crystal screen displays the cause of the error,
and the buzzer sounds to alert you.
___________ _____
___________ _____
BATTERY CHECK
WAIT PLEASE...
Measuring process
When you hold the START button pressed in for about two
seconds, the charger measures the battery connected to
it. This message appears on the screen for one or two
seconds before the charge process is initiated.
Battery type
___________ _____
___________ _____
Input Voltage
13,62V
DECINC
___________ _____
___________ _____
CHG 48:32 03363
NC 200mA 9.773V
END
Input voltage display
___________ _____
___________ _____
*****ERROR******
wrong polarity
___________ _____
___________ _____
*****ERROR******
contact break
___________ _____
___________ _____
*****ERROR******
time limit over
___________ _____
___________ _____
*****ERROR******
bat.volt too hi.
___________ _____
___________ _____
*****ERROR******
bat.volt too low
17


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