Learning Protection Features
Inspecting the capacitor life and initializing the capacitance reference
Refer to the following instructions to inspect the capacitor life and initialize the capacitance
reference.
To perform a capacitor diagnosis, a capacitance reference must be measured and registered by
setting Pr-61 (CAP Diag) to 1 (Ref Diag) when the inverter is used for the first time. The
measured reference value is registered at PRT-63, and is used asthe reference for the capacitor
life diagnosis.
1 On an inverter whose run time has reached the cumulated time for capacitor
replacement, set Pr-61 (CAP Diag) to 2 (Pre Diag).
2 Check the value displayed at Pr-63 (CAP Diag Level). If the value displayed at Pr-63 is
smaller than the value set at Pr-62 (CAP. Level 1), a capacitor replacement warning
(CAP Exchange) will occur.
3 While the capacitor replacement warning continues, confirm that the first bit at Pr-89
(Inverter State) is set.
4 Set Pr-62 to 0.0%. The capacitor replacement warning (CAP Exchange) will be
released.
5 Set Pr-61 to 3 (CAP. Init) and make sure that the value displayed at Pr-63has changed
to 0.0%.
Lifetime diagnosis for fans
Enter the Pr-87(Fan exchange warning level) code (%). After the selected usage (%) is
reached (out of 50,000 hours), the fan exchange warning message will appear in the multi-
functional output or keypad.
The total fan usage level (%) appears at Pr-86. When exchanging fans, you may initialize
the accumulated value to 0 by setting the CNF-75 (Initializing accumulated time for cooling
fans) to 1.
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