7
TROUBLE SHOOTING
8 TROUBLE SHOOTING
Malfunction Possible cause What to do
No output voltage and/or current No AC mains or fuse blown Check fuse, replace if necessary.
Mains or generator output voltage too low Check input voltage, must be between
90 and 160V (nominal 117V).
Output voltage too low but Battery load consumes more than the Reduce the battery load taken from
charger supplies max. current charger can supply, the battery voltage batteries.
cannot increase more
Batteries not 100% charged Measure the battery voltage after a
while, this will be higher.
One or more battery cells having Check if the battery temperature
short circuits is higher than normal.
Charge current too low Batteries almost fully charged Check if the charger is in the absorp-
tion mode. In this mode, the charge
current will slowly decrease.
High ambient temperature If the ambient temperature is more than
104°F (40°C), the maximum charge
current will be reduced automatically.
Mains too low When the mains voltage is less than
105V, the charger will regulate the
current down.
Batteries not fully charged Charge current too low See “charge current too low”;
Current to load too high Decrease the battery load;
Charge time too short Increase type of charger;
Battery temperature too low Use temperature sensor;
Defective battery (short circuit in cell) Replace the battery;
Defective battery charger Check the charger.
Battery very fast empty Battery capacity reduced because: of:
• wastage Replace the batteries;
• sulphating/stagnation Charge/discharge for several times, this
might help, otherwise replace batteries.
Batteries are warm/gassing Defective batteries (short circuit in cell) Replace batteries;
Battery temperature too high Use temperature sensor;
Charge voltage too high Check jumper ‘battery isolator’
on front panel.
If you cannot solve the problem with this fault finding table, contact your Mastervolt Service Center.
For a detailed distributor list, see www.mastervolt.com or contact our main office in Amsterdam, tel. +31-20-3422100.
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