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00051
ALTERNATOR NOT CHARGING
• ACTIVATION: Unit is running and the current flow is less than -1.0 amps (discharge) between the alterna-
tor and the battery for 3 continuous minutes.
• UNIT CONTROL: Alarm only, or if Alternator Check Shutdown Configuration is set to “YES” shutdown &
alarm.
• RESET CONDITION: Auto reset (if not shutdown) when alternator is charging or alarm may be manually
reset using the display mounted keys 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). (Refer to Note 1 in
Section, page 7-2.) Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check Water Pump/Alternator Belt
Check belt tension & condition. Verify no glazing, cracking, or slipping. Refer to
Replace if required.
2.
Check Current Transformer (CT)
a. Check current value. Power up control system in PC Mode. (Refer to
.) Check Unit
Data. Must be -2.0 to 1.5A with no load.
b. Check CT power from main microprocessor. Must have +5 VDC from terminal 2MM-29 to PCM-31.
c. Check CT ground to main microprocessor. Check wiring from terminal 2MM-23 to PCM-30.
d. Check CT signal to main microprocessor. Check wiring from terminal 2MM-12 to PCM-29.
3.
Check Alternator Wiring & Output
a. Check output & ground wiring (unit OFF). Ground from alternator G terminal to PCM-T2. Positive from
alternator B+ terminal to PCM-T3.
b. Check output (unit running). When the unit is started, voltage at the battery will begin near 12.0 VDC,
and slowly rise toward 13.5 VDC as the battery charges.
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 alternator rating.
5.
Perform Pretrip Check
Clear Active Alarm list, then run Pretrip & check for any new alarms. Any active alarms must be cor-
rected and cleared before proceeding.
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