Tweco Troubleshooting Power Supply - Manual (Page 21)

21
Ribbon Cable disconnected or open.
Even though INV_READY is open collector, normally high, the ribbon cable
must be connected to CN6 on PCB5 and at least one inverter or INV_READY
signal will be false. The reason is CN6 -10 on PCB5 must be pulled low by one
of the inverters or a circuit on PCB5 will pull INV_READY low. If pin 10 of the
ribbon cable is open that will cause INV_READY to be false.
Contactors
If there are 2 or 3 inverters, a single defective contactor will not cause 2-4 code
as the remaining inverters that are getting power will satisfy the INV_READY
signal.
230V
460V
CN2 1 2 3
CN6 CN5 CN1
CN5
DETECTOR PCB
CN4 CN6
+12VDC
CN3 1 2
RY5
CN10 1 2
+
RY6
RY 2
CN7 1 2 3 4 5
+12VDC
PCB4 WK-5604
230V
+12VDC
CN4 1 2 3 4
460
TB3
TB4
TB5
COM_A
CN9
1
2
3
230_A
460_A
CN10
1
2
3
230
COM
+
RY1
460
COM
+
RY2
230
FROM
AC INPUT
CN2 1 2 3 4 5
PCB7 WK-5628
RELAY PCB
N (-)
P (+)
T
R
CN6
CO
M
_
A
CN2-460V
1
2
3
4
230_A
S
CN4 - PCB12
1 2 3 4
460_A
100A INVERTER MODULE # 2 (bottom)
CN1-230V
1
2
3
4
23
0
CO
M
460
N (-)
P (+)
V Change PCB
R
T
CN6
CO
M
CN2-460V
1
2
3
4
V Change PCB
23
0
CN4 - PCB12
1 2 3 4
46
0
S
100A INVERTER MODULE # 1 (Top)
CN1-230V
1
2
3
4
T1
460
220
0___