Komatsu Fault Code
Free · no signupSPN 520880 FMI 01
Low Operating Power / Fast Charge Denied
System
Battery / Thermal
Symptom
Low Operating Power / Fast Charge Denied
Diagnosis & fix steps
LOGIC: Battery Pack Internal Temperature Below Safe Operating Limit (<0°C).
ACTION: Check internal high-voltage PTC battery heating elements and control relays. Verify low-temperature coolant circulation loop operates to bring pack core above 10°C before heavy draw or fast charging.
Red Seal field insights
Lithium Plating: Forcing high charging currents or heavy discharge loads into freezing lithium cells permanently plates metallic lithium onto the graphite anodes, destroying capacity and risking thermal dendrite shorts.
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