Carrier VECTOR 6500 Operation & Service Manual page 143

Alarm
Steps
NO.
16 BATTERY VOLTAGE TOO LOW
•
TRIGGER–ON: Voltage at the microprocessor is less than 10 VDC (except when the engine starter
is engaged.)
•
UNIT CONTROL: Unit Shutdown & Alarm. Alarm condition only if activated while starting unit.
•
RESET CONDITION: Auto Reset after 15 minutes when the voltage at the microprocessor is
between 11 - 14 VDC, or alarm may be manually reset via keypad or by turning the unit off, then
back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
1 Check For Alarm 51
Check for "Alternator Not Charging
Alarm". (Note: The A51 name is car-
ried over from unit models with alter-
nators. For the Vector Model, Alarm
51 indicates that the solid state bat-
tery charger is not performing cor-
rectly.)
2 Check Battery Voltage
a. Inspect battery cable ends and
posts.
b. Test voltage at battery with unit off. Must be above 11 VDC.
c. Test voltage at battery with unit
running.
d. Test specific gravity of battery.
e. Perform load test on battery.
(Follow
procedure.)
3 Check Voltage At Microprocessor
a. Check voltage reading at
microprocessor input (MPQC1+ to
MPQC2-).
b. Check voltage reading on
microprocessor display.
62-11389
Alarm/Cause
battery manufacturer's
7−10
Corrective Action
Alarm conditions must be corrected and the alarm
cleared to continue.
Must be clean and tight.
Must be above 11 VDC.
(Check for battery specifications.)
(Check for battery specifications.)
Must be above 11 VDC.
Must be within 0.5 VDC of reading obtained at QC-1.