19
5.3
Troubleshooting Chart
Isolate from all power sources prior to performing any interior verifications or part replacements.
Symptom
Possible Cause
AC Breaker Trips Immediately
(High Input Current)
Wrong AC Input Voltage
AC Input Taps on Power Transformer are Incorrectly Set
Incorrect, Damaged or Loose Cable/Harness Connections
DC Output Too High
Defective Component on Heatsink Assembly
DC Breaker Trips Immediately
(High Output Current)
Incorrect, Damaged or Loose Cable/Harness Connections
Incorrect Battery Connected
Shorted Output Cables
Shorted Battery Cells or Customer Equipment
Defective Component on Heatsink Assembly
No Display and No LEDs
No AC Voltage Applied to Charger
Charger AC Breaker is open
Incorrect, Damaged or Loose Cable/Harness Connections
Defective Control/Display Board (S2A-368S)
Failed LED Test
Defective Control/Display Board (S2A-368S)
Defective LEDs
Meter Reading Incorrect
Voltage or Current
Incorrect, Damaged or Loose Cable/Harness Connections
Incorrect Settings on Control Board
Defective Shunt
Defective Control Board (S2A-368S)
Charger Running Hot
Inadequate Ventilation
Ambient is Too Hot
Battery Temperature Too
High
Insufficient Cool Down Between Charges
Battery Power Demand Too Great
Battery Needs to be Equalized
Erratic Operation
Defective Control Board (S2A-368S)
Incorrect, Damaged or Loose Cable/Harness Connections
Defective Component on Heatsink Assembly
Moisture Inside Cabinet
Lack of Maintenance
High Ambient Temperature
Low Output Voltage
or Current
Output Voltage settings are Incorrect
Charger is in Current Limit
Defective Control Board (S2A-368S)
Defective Component on Heatsink Assembly
High Output Voltage
or Current
Output Voltage settings are Incorrect
Defective Control Board (S2A-368S)
Defective Component on Heatsink Assembly
Ground Detection Fault
(Positive Ground / Negative Ground)
Isolate charger from DC system by removing all wires from charger output
terminal. If ground fault on charger clears, problem may be on external DC loads,
battery, or wires. If ground fault is still present on charger, contact La Marche
Service Department for further troubleshooting.
Ordering Replacement Parts
Contact La Marche to place an order for spare or replacement parts.
To order replacement parts; please provide
the model and serial number of the charger, the part needed, and the quantity required.
