Yaskawa VCD 723 - Manual (Page 76)

4 Troubleshooting/Maintenance
70 Troubleshooting Flowcharts
9/15/93
Chart 11. Control Function Error ( CPF ) Fault Indication
1. CHECK THAT ALL DRIVE
HARNESS CONNECTORS,
AND CONTROL BOARD
MOUNTED PCB's, ARE
FIRMLY SEATED.
2. CHECK THAT CPU AND
EPROM ARE INSERTED
SECURELY.
3. CHECK THAT NO NOISE
SOURCE IS PRESENT.
4. REPROGRAM PER PAC
DIAGRAM USING
FACTORY RESET CODES.
5. CHECK Sn-01 AND Sn-02
FOR PROPER VALUES.
TURN OFF POWER. AFTER
"CHARGE" LAMP ON MAIN
PC BOARD GOES OUT,
TURN POWER BACK ON.
IS CPF STILL
INDICATED?
IS CPF STILL
INDICATED?
YES
YES
NO
NO
SELF-DIAGNOSIS FUNCTION
HAS DETECTED FAILURE IN
THE CPU OR PERIPHERAL
COMPONENTS.
REPLACE THE CONTROL PCB,
OR APPROPRIATE CONTROL
MOUNTED PCB. DRIVE IS OK.
RETURN TO NORMAL
OPERATION.