VLT ® 2000 Series 7) 8) Factory settings and service Symptom No message or light in display 9) Call Danfoss for assistance Section 1 Section 2 Section 3 10) 11) Ensure that the foregoing step is ok: The fault can be caused by short-circuiting on the control signals. The 24 V supply might be short- circuited. 12) Call Danfoss for assistance MG.20.B6.02 – VLT is a registered Danfoss trademark 99 Have prefuses for the VLT frequency converter blown? No Yes Is the control card over- loaded? Disconnect all control signals plugs on the control card. Does the fault disappear? No Yes