Vacon CX - Page 27

TROUBLESHOOTING Service Manual M4 - M10
11.07.2002 Page 27
F4
Disconnect motor cable
F4 INVERTER FAULT
IGBT's OK
Replace defective IGBT's by following
instructIons on section 8.4.4 and 8.4.5
and replace power board according to
instruction 9.2.7.
Power and start up the drive. Run through the
frequency range Fmin - Fmax
Check the gate drive circuits according to
instructions on section 7.3.2.3. Replace
defective parts as recommended in spare part
lists
Clear fault memory
F4
Check IGBT according to instructrions on
section 7.3.2.2.
F4
Please follow the procedures described in F5
troubleshooting section
NO
YES
NO
NO
YES
YES