4-6 IDU MOUNTING
NWD-107460-02E Installation
4.2 FAN Unit Replacement
When replacing the FAN unit used in the IDU, perform the following procedures.
Notes
1. NEC recommends replacement of the FAN unit approximately every
three years, even if the FAN unit operates normally.
2. In the case FAN alarm occurred, replace the FAN unit immediately.
3. The FAN unit can be replaced under power-on condition
(hot-swappable).
(1) Removal of the old FAN
Perform the steps in order of 3-2-1 shown after the following figure.
(2) Installation of the new FAN
Perform the steps in order of 1-2-3 shown after the following figure.
Step 1
Submission Prohibited
NEC Internal Use Only
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