Wesley BC-620-4CA User Manual
Page 116
112
Curtis 1234/36/38 Manual,
OS
11
8 — DIAGNOSTICS & TROUBLESHOOTING
Table 5 TROUBLESHOOTING CHART
PROGRAMMER LCD DISPLAY
CODE
EFFECT OF FAULT
POSSIBLE CAUSE
SET/CLEAR CONDITIONS
12
Controller Overcurrent
1. External short of phase U,V, or W
Set: Phase current exceeded the current
ShutdownMotor;
motor connections.
measurement limit.
ShutdownMainContactor;
2. Motor parameters are mis-tuned.
Clear: Cycle KSI.
ShutdownEMBrake;
3. Controller defective.
ShutdownThrottle;
FullBrake;
ShutdownPump.
13
Current Sensor Fault
1. Leakage to vehicle frame from phase Set: Controller current sensors have
ShutdownMotor;
U, V, or W (short in motor stator).
invalid offset reading.
ShutdownMainContactor;
2. Controller defective.
Clear: Cycle KSI.
ShutdownEMBrake;
ShutdownThrottle;
FullBrake;
ShutdownPump.
14
Precharge Failed
2. External load on capacitor bank (B+ Set: Precharge failed to charge the capacitor
ShutdownMotor;
connection terminal) that prevents
bank to the KSI voltage.
ShutdownMainContactor;
the capacitor bank from charging.
Clear: Cycle Interlock input or use VCL
ShutdownEMBrake;
1. See Monitor menu » Battery:
function
Precharge()
.
ShutdownThrottle;
Capacitor Voltage.
FullBrake;
ShutdownPump.
15
Controller Severe Undertemp
1. See Monitor menu » Controller:
Set: Heatsink temperature below -40°C.
ShutdownMotor;
Temperature.
Clear: Bring heatsink temperature
ShutdownMainContactor;
2. Controller is operating in an extreme above -40°C, and cycle interlock or KSI.
ShutdownEMBrake;
environment.
ShutdownThrottle;
FullBrake;
ShutdownPump.
16
Controller Severe Overtemp
1. See Monitor menu » Controller:
Set: Heatsink temperature above +95°C.
ShutdownMotor;
Temperature.
Clear: Bring heatsink temperature
ShutdownMainContactor;
2. Controller is operating in an extreme below +95°C, and cycle interlock or KSI.
ShutdownEMBrake;
environment.
ShutdownThrottle;
3. Excessive load on vehicle.
FullBrake;
4. Improper mounting of controller.
ShutdownPump.
17
Severe Undervoltage
1. Battery Menu parameters are
Set: Capacitor bank voltage dropped
Reduced drive torque.
misadjusted.
below the Severe Undervoltage limit
2. Non-controller system drain on battery. (see page 55) with FET bridge enabled.
3. Battery resistance too high.
Clear: Bring capacitor voltage above
4. Battery disconnected while driving.
Severe Undervoltage limit.
5. See Monitor menu » Battery:
Capacitor Voltage.
6. Blown B+ fuse or main contactor
did not close.