Yaskawa Z1000 AC Drive HVAC - Manual (Page 335)

C.10 Self-Diagnostics
The drive has a built-in self-diagnosing function of the serial communication interface circuits. To perform the self-diagnosis
function, 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 or
serious injury. Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the power supply
is turned off. The charge indicator LED will extinguish when the DC bus voltage is below 50 Vdc. To prevent electric shock, wait at least
one 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 the following diagram, connecting terminals R+ and S+, R- and S-, and
S6 and SP.
M3 M4 M6
M1 M2 M5
MA MB MC
IG R+ R- S+ S- +V AC A1 A2 FM AM AC
FE S1 S2 S3 S4 S5 S6 S7 SN SC SP +P
IG R+ R- S+ S- +V AC A1 A2 FM AM AC
FE S1 S2 S3 S4 S5 S6 S7 SN SC SP +P
Figure C.7 Terminal Connections for Communication Self-Diagnostics
5.
Connect a wire jumper between terminals SN and SC to change to source mode.
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 operating
normally.
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-SP. Reset the wire jumper to its original position and
set terminal S6 to its original function.
10.
Return to normal operation.
C.10 Self-Diagnostics
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 335
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