Mitsubishi Electric FATEC FR-A800 Manual page 91

5
BREAKDOWN MAINTENANCE
(7) E.USB display <USB communication fault>
Change N041 (Pr.548) (USB communication check time interval) to "9999", and put the USB
cable back.
(8) E.RET display <Retry count excess>
1) Use FR Configurator2 to measure the graph from when the electronic thermal O/L relay
(E.THM display) occurs to when retries are performed for three times in five seconds.
Set the trigger position to 90%.
2) Check that the graph that is measured on 1), H302 (Pr.68) (Retry waiting time), and H301
(Pr.67) (Number of retries at fault occurrence) are consistent.
3) Change H301 (Pr.67) (Number of retries at fault occurrence) to the initial value "0", H302
(Pr.68) (Retry waiting time) to "1s", and H000 (Pr.9) (Electronic thermal O/L relay) to "2A"
(The electronic thermal O/L relay setting value for the demonstration machine).
(9) MT display <Maintenance signal output>
On simultaneous monitoring of FR Configurator2, check the actual operation time of No.19.
Change E711 (Pr.504) (Maintenance timer warning output set time) to "9999".
(10) PS display <PU stop>
Turn OFF the start signal, and then press the PU/EXT button to clear the error.
5.3 Appendices for demonstration (Confirmation of error descriptions and
86
others)