F-code
Section
C-code
PS S5.12 5460 24 Volt, 400 Amp Transistor Controller Version no
T-code
001
HMX
5.4. Troubleshooting Chart Using the Handset Fault
Disable Controller When
Test When
Recover When
BB circuit check (BB = Belly Button)
Continuous after brake release
Circuit found open
Brake released
Coil open/shorted driver
Entering and in neutral, before allowing PWM out, after brake released
Immediate
Cycle Brake S10
Contactor driver overcurrent
Continuously while contactor being driven
Immediate
Cycle Brake S10
Overvoltage
Continuous after brake released
Immediate
Cycle Brake S10
Power supply out of range
Once upon activating S17 and continuous after brake release
Immediate
Cycle Brake S10
M-fault
PWM output (0+) percent to 85 percent. After brake release and not in emergency reverse
Immediate
Cycle Brake S10
M-circuit check
Brake released
Immediate
Cycle Brake S10
Start-up checks
Once upon activating S17
RAM & EEPROM failure only
Cycle S17
Throttle fault
Continuous after brake released
Set throttle input to zero, decel output PWM to zero
Condition clears
Under voltage, Severe
Once upon activating S17 and continuous after brake release
Immediate
Cycle Brake S10
Current sensor fault
Continuous while PWM on
Immediate
Cycle Brake S10
Vds over current
Continuous while PWM on
Immediate
Cycle Brake S10
Watchdog, Ext.
Continuous while S17 on
Immediate
Cycle Brake S10
Watchdog, Int.
Continuous while S17 on
Immediate
Cycle Brake S10
Welded contactor
Continuous while brake released Immediate & no contactor driven
Cycle Brake S10
Parameter block check
Initiating serial communication
© BT Products
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Service Manual
Never - disable serial interface
1997-07-15
Reinitiating serial interface
269
