Zippy MRW-6420P - Manual (Page 15)

F) Turn on the power module.
G) Check the LED of the power module that should light Green.
H) Check the LED indicating the total power status, which should change from
Red to Green.
I) Tighten the screws and fix the power module.
J) If you want to test this functional power module in simulating defective
situation. Please refer to the Section 1.8 Installation & Testing.
Remarks: If the DC fan of the power module fails, you have to replace the
power module. Please follow the same procedures.
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