7
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62-11389
Alarm
NO.
Steps
Alarm/Cause
Corrective Action
7.6 WARNING / STATUS ALARMS
51
ALTERNATOR NOT CHARGING (This alarm applies to the Battery Charger)
•
TRIGGER–ON: Unit is running in either Engine or Standby Operation and the current flow is more
than -1.0 amps (discharge) between the battery charger and the battery for 3 continuous minutes.
•
UNIT CONTROL:
Engine Operation: alarm only or (if Alternator Check Shutdown configuration
is set to YES (configured for shutdown) engine and unit shutdown and
alarm.
Standby Operation: alarm only regardless of configuration setting.
•
RESET CONDITION: Auto Reset (if not shutdown) when alternator is charging if not shutdown or
change unit to standby Operation 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, clear the
alarm(s). (See Note 1 page 7
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2.) Operate the unit through the appropriate modes to see if any active alarm
occurs. Continue with the steps below as necessary.
1
Check Microprocessor Current Sensor
Check microprocessor current value. Power up microprocessor in PC Mode. (Refer to Sec-
tion 5.3.) Must be -2.0 to 1.5A with no load.
2
Check Wire Direction Through Current Sensor
Visually inspect wire at current sensor. Must go through current sensor in the direction of the
arrow on the sensor:
away
from the F-5 fuse for units with a Main Power
switch labeled Engine-Off-Standby
toward
the F-5 fuse for units with a Main Power
switch labeled Start/Run-Off.
3
Check Battery Charger Wiring
a. Check output & ground wire (unit
OFF.)
Negative lead on Ground terminal
Positive lead on Output terminal = same as battery
voltage.
b. Check battery charger input.
Check for AC voltage between SPX, SPY & (for 40
amp 3phase chargers) SPZ. Check fuses F7, F8 and
(for 40 amp 3phase chargers) F29.
c. Inspect harness & control box
connector pins & terminals. (See
wiring schematic Section 10.)
No physical damage to harness.
No damage, moisture, or corrosion in connectors.
d. Check output and ground wire
voltages (unit running.)
When the unit is started, battery voltage at the bat-
tery will begin near 12.0 VDC, and slowly rise toward
13.5 VDC as the battery charges.
NOTE:
Do not test for voltage at the output connec-
tor of the battery charger without the connector being
connected to the battery. Without the battery con-
nected any reading will be very inaccurate. (Refer to
Section 8.9.8 for more information on checking bat-
tery charger.)
4
Check For Add–on Equipment Drawing Too Much Current
Check amperage of added–on
components & accessories.
Total current draw including the actual unit current
draw and all add–on components & accessories must
be less than battery charger rating.
5
Perform Pretrip Check
Clear Active Alarm list, then run
Pretrip & check for any new alarms.
Any active alarms must be corrected and cleared
before proceeding.
