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6.3 Ordinary maintenance
After the removal of power from the UPS, the capacitors discharge time inside the power modules is 40 minutes.
It is forbidden to operate inside the power modules before this time has elapsed.
6.3.1 Hot-swap procedure for the replacement of power modules
The hot-swap procedure makes it possible to replace a faulty power module while the load is powered by the UPS in
on-line mode. In case of a black-out during the procedure, there is no risk to power off the load since it is supplied by the
other power modules.
INDICATION
To use this function, the UPS must have at least two power modules and the output power required must not be above
the one available during the hot-swap procedure.
Always replace just one PM at a time.
If the load power does not allow the hot-swap without overload, perform the manual bypass mode maintenance proce-
dure.
Each power module (PM) is identified by a unique address inside the system, as shown below:
KEOR MOD 125 KEOR MOD 250
6. Maintenance
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