GYS BT280 Mode D'emploi page 7

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A. OK : Diodes function well in alternator / stator.
B. HI : One or more diodes in the alternator are not functioning or
there is stator damage. Check to ensure the alternator
mounting is sturdy and if the mounting and belts are good,
please replace the alternator.
2. Turn engine off and remove the test clamps from the battery posts
after completion of testing to end test.
TROUBLESHOOTING
- If the screen shows HI :
Voltage of the tested battery is over 15.99V & too high for 12V battery.
BT280 won' t work under this situation. Please re-check if the tested
battery is 12V.
- If the screen shows LO :
Voltage of the tested battery is under 4.5V. BT280 won't work under this
situation. Please recharge the battery & re-test. If reading is the same,
the battery should be replaced immediately.
- If the screen shows blank :
The voltage of the tested battery is too low to serve the BT280. Please
recharge the battery retest. If got the same result, the battery should be
replaced immediately. Or the clamps are connected reversely. Please
check & re-connect it.
- The screen flickers or shows RIPPLE :
The voltage is unstable. Please recharge the battery then re-test. If
reading is the same, the battery should be replaced immediately.
- GB.7-V1 -