Fault Codes - Ezgo RXV ELECTRIC Service & Repair Manual

Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notes, Cautions and Warnings.
CODE DESCRIPTION
8976 AC Over Current
9024 AC Short Circuit
12576 DC Bus Timeout
12817 DC Bus High - Soft-
ware Detected
TROUBLESHOOTING AND DIAGNOSTICS
POSSIBLE CAUSES
1. Software detects motor cur-
rent 50% higher than controller
peak rated current. NOTE: this
error is seldom seen. It is usu-
ally the result of motor parame-
ters such as stator inductance
or resistance being out of spec.
Transient Events can also
cause this error without a com-
ponent failure
1. Short circuit detected in con-
troller, motor cable or motor.
1. DC Bus voltage has not
reached 24 volts within 10 sec-
onds after key switch start.
1. Battery Pack voltage is over
63 volts. NOTE: It is unlikely
this error will occur in the fac-
tory. If it occurs in the field dur-
ing regenerative braking,
energy is transferred from the
controller back to the battery
pack raising the DC Bus volt-
age and battery pack terminal
voltage only if the energy burn
circuit is not properly function-
ing.
Repair and Service Manual
DIAGNOSTIC STEP
1. Turn key to 'OFF' and then back 'ON'. If
car does not run proceed to step 2.
2. Disconnect U, V, W from controller. Check
resistance between U -V, V-W, and U-W,
each should be 0.4-0.8 Ohms. If readings
are out of range see ACTION 1. If readings
are in range and car does not run proceed to
step 3.
3. Remove controller from the non-running
car and install it in a running car, if this vehi-
cle does not run with this controller the con-
troller is suspect. See ACTION 2
1. Turn key to 'OFF' and then back 'ON'. If
car does not run proceed to step 2.
2. Disconnect U, V, W from controller. Check
resistance between U -V, V-W, and U-W,
each should be 0.4-0.8 Ohms. If readings
are out of range see ACTION 1. If readings
are in range and car does not run proceed to
step 3.
3. Remove controller from the non-running
car and install it in a running car, if this vehi-
cle does not run with this controller the con-
troller is suspect. See ACTION 2
1. Check battery voltage across all 4 batter-
ies, voltage should read 42 VDC minimum, if
O.K. proceed to step 2.
2. Check voltage across solenoid contacts, if
more than 3 VDC but less than 24 VDC pro-
ceed to step 3, if not see ACTION 3.
3. Remove resistor control module connec-
tion to controller B- terminal, if error status
changes follow ACTION 1.
1. Verify that all battery wires are securely
fastened and have less than 0.1 ohms resis-
tance between wire terminal and battery
post.
2. Check the battery voltage across all 4 bat-
teries, voltage should read 63 VDC MAXI-
MUM.
3. Check voltage across solenoid contacts. If
more than 3 VDC but less than 24 VDC pro-
ceed to step 3, if it does not fall in this range
follow ACTION 3.
4. Verify power resistor ohm reading is
between 0.2 and 0.5 ohms.
5. Remove resistor control module connec-
tion to controller B- terminal. If error status
changes follow ACTION 1.
B
ACTION (post diagnos-
tics)
1. Replace Motor
2. Replace Controller
1. Replace Motor
2. Replace Controller
1. Replace resistor control
module.
2. If error does reoccur
then replace controller.
3. Replace solenoid.
1. Tighten or replace loose
or high resistance power
wire connections.
2. Replace power resistor.
3. Replace solenoid.
4. Replace resistor control
module.
5. If error continues,
replace the controller.
Page O-5
B