Zippy R2G-6350P - Manual (Page 19)

If everything works out fine, then turn off (remote off) the power system, now put
back the cover of the case and tighten with the screws which you have retained
earlier. Now you have completed the installation of the R2G redundant power
supply system.
1.9 HOT-SWAP PROCEDURES
Please refer to the following when either power module or the fan found
defective.
A) Locate the defective power module by examining the individual LED (if LED
without light, it indicates the power module is defective).
***WARNING:
Please perform the above step carefully otherwise it may cause shut down the
whole system.
***WARNING:
Please do not remove the defective power module until you have worn gloves to
keep from be burned. This is due to the cover of the power module is been used as
heat sink for cooling, usually the temperature is around 50 ~ 60 degree Celsius
under full load condition.
B) Loosen the bracket screws of the power module
C) Remove the defective power module by pulling out method
***WARNING:
Please put aside the power module await for cooling down. Keep from other
people tough it until it is cool.