Table Ii - Komatsu 830E-AC Shop Manual

Dump truck, serial numbers a30001-a30035

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Battery and Control Circuit Checks -

Battery Power ON

Make sure that the link voltage is drained down

performing tests.

1. Prepare for the following checks by performing

the following procedure:

a. Remove the 50 amp fuse (BATFU) from the left

wall of the right side compartment of the

control cabinet.

b. Disconnect circuit wire 21B from the starter

c. Plug in all the cards in the ICP panel. Verify

that all the CN connectors are connected and

control power switch (1, Figure 3-1) is OFF.

d. Verify that all circuit breakers are closed and

deactivated.

e. Make sure that the key switch and the 5 minute

delay timer are OFF.

Power Supply Check (PS):

2. Remove the CN1 connector on the power supply.

Use an ohmmeter to check the harness side

connector pins to ground. Refer to Table II for the

resistance value at each pin.

3. Check for 1.4K ohms between TB3-K and TB3-L

(LEM +24V to -24V power supply busses).

4. After resistance checks are complete, reconnect

CN1 connector.

AC Drive System Electrical Checkout Procedure

(Version 21 Software)

TABLE II. POWER SUPPLY HARNESS

RESISTANCE CHECKS

10/06 E03018

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