Chapter 14 Fault CodesMH300
ID No.
Display Fault Name Description
72
STO Loss 1
(STL1)
S1–DCM internal loop detection error
Action and Reset
Action condition Hardware detection
Action time Immediately act
Fault treatment parameter N/A
Reset method Hardware failure, and cannot reset. Cycle the power.
Reset condition N/A
Record Yes
Cause Corrective Actions
S1 and DCM short circuit lines
are not connected
Re-connect the short circuit line
Hardware failure
After you make sure all the wiring is correct, if STL1
cycling
the power, return to the factory for repair.
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