B.12 Self-DiagnosticsThe drive has a built-in self-diagnosing function of the serial communication interface circuits. To perform the self-diagnosisfunction, use the following procedure.DANGER! Electrical Shock Hazard. Do not connect or disconnect wiring while the power is on. Failure to comply will result in death orserious injury. Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the power supplyis turned off. The charge indicator LED will extinguish when the DC bus voltage is below 50 Vdc. To prevent electric shock, wait at leastone minute after all indicators are OFF and measure the DC bus voltage level to confirm safe level.1. Turn on the power to the drive.2. Note the present terminal S6 function selection setting (H1-06) and set it for the communications test mode(H1-06 = 67).3. Turn off the power to the drive.4. With the power off, wire the drive as shown in Figure B.9, connecting terminals R+ and S+, R- and S-, and S6 andSN.E(G) HC H1 H2 DM+ DM- IG R+ R- S+ S-S1 S2 S3 S4 S5 S6 S7 S8 SN SC SPV+ AC V- A1 A2 A3 FM AM AC MP RP ACFigure B.9 Terminal Connections for Communication Self-Diagnostics5. Verify that terminals SC to SP are connected by wire jumper.6. Turn the power to the drive back on.7. During normal operation, the drive will display “PASS” to indicate that the communications test mode is operatingnormally.When a fault occurs, the drive will display “CE” on the keypad display.8. Turn off the power supply.9. Remove the wire jumpers from terminal R+, R-, S+, S-, and S6-SN. Reset jumper SC to SP to its original position andset terminal S6 to its original function.10.Return to normal operation.B.12 Self-Diagnostics346 YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
