Komatsu 930E-2 Shop Manual page 236

Subcode 09:
Description: An overcurrent condition was detected
after the phase controller power up sequence.
1. Check Capacitor Bank and Controller connec-
tions.
2. Verify the inductor connections match-up (+ and
-) from the Auxiliary Inverter and to the Auxiliary
Capacitor bank (PH+ to IV+ and PH- to IV-).
3. If a problem was found and corrected in step 1 or
2, restart and check operation again.
4. If problem still exists, disconnect AM101, AM201
and AM301 wires connecting the Auxiliary In-
verter to the blower motor.
5. Using an ohmmeter, check for shorts between
blower motor cables and between blower motor
cables and chassis ground.
6. Using an ohmmeter, check for shorts between
AM101, AM201 and AM301 wires and between
IV+ and IV-.
7. If no problem was found in above steps, replace
the Controller.
Subcode 10:
Description: A sustained current overload exists that
is below component safe operating range.
1. Verify the inductor connections match-up (+ and
-) from the Auxiliary Inverter and to the Auxiliary
Capacitor bank (PH+ to IV+ and PH- to IV-).
2. Check the blower fan for blockage or damage.
3. If no problem was found in step 1 or 2, the blower
motor may be damaged.
Subcode 11:
Description: An overcurrent condition exists due to a
low DC bus voltage.
1. Check the 3-phase input connections and fuses
F1 and F2.
2. Check Capacitor Bank and Controller connec-
tions.
3. After performing checks in step 1 and 2, attempt
to restart.
4. If problem still exists, replace the controller.
E3-40 AC Drive System Electrical Checkout Procedure
(Release 17 Software)
Subcode 12:
Description: A sustained overload exists due to low
DC bus voltage.
1. Check the 3-phase input connections and fuses
F1 and F2.
2. Check Capacitor Bank and Controller connec-
tions.
3. After performing checks in step 1 and 2, attempt
to restart.
4. If problem still exists, replace the controller.
Subcode 13:
Description: IGBT protection circuit detected an over-
current condition.
1. Disconnect AM101, AM201 and AM301 wires
connecting the Auxiliary Inverter to the blower
motor.
2. Using an ohmmeter, check for shorts between
blower motor cables and between blower motor
cables and chassis ground.
3. Using an ohmmeter, check for shorts between
AM101, AM201 and AM301 wires and between
IV+ and IV-.
4. If no problem was found in above steps, replace
the Controller.
Subcode 14:
Description: Zero input voltage detected.
1. Check the 3-phase input connections and fuses
F1 and F2.
2. If no problems were found in step 1, replace the
controller.
3/01 E03015