Error Messages, Warnings - GRAUPNER ULTRAMAT 18 Instructions D'utilisation

The ULTRAMAT 18 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.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
* * * * * E R R O R * * * * * *
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
c a r b a t t .
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
* * * * * E R R O R * * * * * *
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
w r o n g p o l a r i t y
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
* * * * * E R R O R * * * * * *
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
c o n t a c t b r e a k
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
* * * * * E R R O R * * * * * *
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
t i m e l i m i t
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
* * * * * E R R O R * * * * * *
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
b a t . v o l t t o o
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
* * * * * E R R O R * * * * * *
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
b a t . v o l t t o o
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17. Error messages and warnings
This warning message is displayed if the voltage of the car
battery falls below the value set in the „Low voltage cut-
e m p t y
off" section of the user settings (11.0 V).
This warning message is displayed if a battery is
connected to the unit's charge outputs with incorrect
polarity.
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
o v e r 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,
h i .
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,
l o w
this error message is displayed.
The purpose of this error message is to avoid the cells
becoming deep-discharged due to an incorrect setting.