Komatsu 830E - Page 259

E03012 2/02 Statex III Electrical Checkout Procedure E3-29
f. Reverse polarity of input. Jumper circuit 71 to terminal “C” and jumper circuit 710 to terminal
“A” at VMM1.
 Verify negative value of output voltage measured in step e. and negative value on PTU
screen.
g. Remove jumpers and voltmeters. Restore all disconnected wiring.
12. MOTOR M2 ARMATURE VOLTS - VMM2: . . . . . . . motor 2 volts = 0.0
a. Repeat same test procedure used on alt output volts, except substitute VMM2 instead of
VMM1.
13. ALTERNATOR FIELD VOLTAGE - VDR3: . . . . . . . . alt field volts = 0.0
(Screen value volts = 10.6 x input volts).
a. Disconnect wires from VDR3 terminal “E” and “D”.
b. Connect a 1.5 volt battery (i.e. flashlight battery) to wire removed from “E” (-) and to VDR3
terminal “D” (+).
c. Measure actual voltage of battery used in above step.
PTU screen should read actual test battery voltage x 10.6
Example:
If test battery voltage measures 1.550 volts, PTU screen should read 16.43 volts.
d. Remove test battery. Screen should read 0 volts.
e. Reconnect wires removed in step a.
MOTOR 1 TEMPERATURE . . . . . . . . . . . . motor 1 temp = 0.000 V; 0.0° C
NOTE: Motor Temperature monitoring system is optional.
a. Disconnect motor 1 temperature sensor wires 722C and 722A routed to wheel motor from
terminal board in control cabinet.
b. Connect a 100 ohm resistor to terminal board in place of wires removed in previous step to
simulate 0°C temperature signal into analog input card.
Screen value on PTU should read 1.96 ±.04 volts and 0.0° C.
c. Replace 100 ohm resistor with a 181 ohm resistor. (210°C)
Screen value on PTU should read 3.55 ±.07 volts and 210° C.
d. Remove resistor and replace sensor wires at terminal board.