3 Commissioning Procedure
Mk8 MM Manual Page | 80
3.4.7 Commissioning VSD
Figure 3.4.7.i Commissioning VSD
Press on the VSD tab to view the VSD output and input signal during commissioning.
If the MM has been enabled with VSD for commissioning and then disabled, or vice versa, a conflict
message will appear ‘VSD configuration does not match commissioning.’
If there is little movement required with the VSD signal, the feedback fault tolerance should be set
accordingly. If the tolerance is not set according to the variation, an error ‘VSD feedback change too small’
will occur.
Please see options 99 and 109 for the VSD fault tolerance, which ensures that a VSD can be verified to be
at the correct speed at low fire and different to that of high fire. This also ensures that VSD signal is checked
for fixed values and cannot be bypassed, preventing an unsafe condition with reduced air than
commissioned. The minimum feedback variation applies to both the upper and lower limits so the total
commission must allow for the two combined.
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