Promise Technology VTrack M-Class M200i - Manual (Page 232)

VTrak M-Class Product Manual
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8. Separate the cooling unit section to access the blowers.
The upper fan is Fan 1, the lower fan is Fan 2. From the LEDs on the cooling unit
(see the diagram on page 221), you know which fan to replace.
9. Lift the fan off the mounting pins and detach the electrical connector.
10. Attach the electrical connector of the new fan and set it in place.
Fan 1 Fan 2