S100 ULt (Under Load) — cause?

Motor underload trip activated, actual load is less than set level. Operates when Pr.27 is set to non-zero.

S100 ULt — how to fix?

Check motor-load connection. Reduce underload level set value (Pr.29, Pr.30).

InverterS100Verified · sol.ls-electric.com

S100 ULt — Under Load

Trip — immediate stop

CAUSE

Why does it occur?

Motor underload trip activated, actual load is less than set level
Operates when Pr.27 is set to non-zero

REMEDY · Step by step

How to fix it?

Check motor-load connection
Reduce underload level set value (Pr.29, Pr.30)

Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).

SOURCE

Related manual page

Verified · sol.ls-electric.com

S100 Simple Manual English V3.7 (240830)

p.186 · V3.7

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S100 ULt — Under Load

Why does it occur?

How to fix it?

Related manual page

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