• 12 •
TESTING AFTER CHARGING
After the unit has been changed from tester to charger (by selecting a charge rate and pressing the START
button), it remains a charger. To change the battery charger back to a tester, press the START button.
NOTE: The battery tester is only designed to test batteries. Testing a device with a rapidly changing voltage
could yield unexpected or inaccurate results.
USING THE ALTERNATOR PERFORMANCE TESTER (12V only)
1. With the charger unplugged from the AC outlet, connect the charger to the battery, following the
instructions given in previous sections.
2. Plug the charger AC power cord into the AC outlet.
3. Set the ON/OFF switch to the 12V position. DO NOT choose a rate with the Rate Selection button.
4. Start the vehicle, rev the engine at 2000 rpm for 30 seconds and turn on the vehicle’s headlights or
other accessories.
5. Read the alternator percentage on the digital display. Readings below 0 (13.2 volts) will read LOW
and readings above 100% (14.6 volts) will read HI.GH. If you get a HI.GH or LOW reading, have the
electrical system checked by a qualified technician.
NOTE: Refer to your vehicle owner’s manual for appropriate voltage numbers for your alternator.
FAN OPERATION
It is normal for the fan to start and stop when maintaining a fully charged battery. The fan does not run in Tester
Mode. Keep the area near the charger clear of obstructions, to allow the fan to operate efficiently.
12. DISPLAY MESSAGES
CONNECT CLAMPS (Voltage LED lit) – Plugged into the AC outlet without the clamps connected to a battery.
WARNING CLAMPS REVERSED (red LED flashing) – Plugged into the AC outlet and the clamps are
connected backwards to a battery. Scrolls until condition is corrected.
ANALYZING BATTERY (yellow/orange LED lit) – Plugged into the AC outlet, and when first connected to a
12 or 24V battery correctly.
CHARGING 12V – XX% (yellow/orange LED lit) – Plugged into the AC outlet and correctly connected to a
discharged 12V battery.
BOOST ON – 12V (yellow/orange LED lit) – Plugged into the AC outlet and correctly connected to a
discharged 12V battery.
BOOST ON – 24V (yellow/orange LED lit) – Plugged into the AC outlet and correctly connected to a
discharged 24V battery.
FULLY CHARGED AUTO MAINTAINING (green Charged/Maintaining LED lit) –
Plugged into the AC outlet and correctly connected to a fully charged 12 or 24V battery.
CHARGING ABORTED BAD BATTERY – Circumstances that could cause an Abort situation during charging:
• The battery is severely sulfated or has a shorted cell and can’t reach a full charge.
• The battery is too large or there is a bank of batteries and it doesn’t reach full charge within a set time period.
Circumstances that could cause an Abort situation during maintaining:
• The battery is severely sulfated or has a weak cell and will not hold a charge.
• There is a large draw on the battery and the charger has to supply its maximum maintain current for a 12
hour period to keep the battery at full charge.
ENGINE STARTING ON (yellow/orange LED lit) – The battery is properly connected and Engine Start
mode has been selected.
READY (yellow/orange LED lit) – The charger’s output is enabled and the charger is ready to perform
engine start.
COOL DOWN XXX SECONDS REMAINING (Battery Type LED lit) – The charger is in a mandatory 3 minute
(180 second) cool down state.
