Battery Charger Fault – Unit Forced to Low Speed

The battery charger has a fault, and the unit is forced to low speed to protect the system.

Possible causes

Slight overload on the charger
Charger temperature above average
Old battery requiring excessive charging current
Programmed power limitation

Recommended actions

Check battery state of health
Confirm no extra loads are connected to the battery
Inspect charger compartment ventilation
Monitor if error disappears as unit cools down

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Other Thermo King codes

00No Alarms Exist 02Check Evaporator Coil Sensor (Zone)03Check (Control) Return Air Sensor (Zone)04Check (Control) Discharge Air Sensor (Zone)05Check Ambient Temp Sensor 06Check Coolant Temp Sensor

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