Organizational Troubleshooting (continued)
TEST OR INSPECTION
Disconnect battery and lower control panel (paragraph
Battery power may be present at terminals on back of control
panel and electrical bay when battery is connected. Do not
touch any bare terminals.
c. Connect battery.
If voltage is present, go to step e. If not, disconnect
battery and check cable P41B1/0 (between contactor K3 and
shunt R2) for continuity. Replace cable if defective.
e. Measure for +24 vdc between terminal X1 of contactor K3 and
ground. If voltage is present, go to step f. If not, dis-
connect battery and check wire (P41A20) between terminals A2
Measure for +24 vdc between terminal X2 of contactor K3 and
ground. If voltage is present, go to step h. If not, do
Disconnect battery and test BATTERY OUTPUT switch 1S5 (mal-
function 79). If switch checks good, replace contactor K3
Measure for 0 vdc between terminal A1 of contactor K3 and
ground. If 0 vdc is measured, go to step i. If +24 vdc is
present, disconnect battery and replace contactor K3.
Set MASTER SWITCH and BATTERY OUTPUT switches to ON. Measure
for +24 vdc between terminal Al of contactor and ground. If
voltage is present, contactor is good (set switches off and
disconnect battery). If not, continue with step j.
Measure 0 vdc between terminal X2 of contactor K3 and ground.
If 0 vdc is present, disconnect battery and replace contactor