Tennant EC-H2O T12, Service Information Manual, Page: 82 / 178

4-14
T12 Service Information 9009917 (12-12)
TROUbLESHOOTING
Curtis 1232 Controller Diagnostic Codes, continued
TROUBLESHOOTING CHART, continued
FAULT CONDITION
CODE
EFFECT OF FAULT
POSSIBLE CAUSE SET/CLEAR CONDITIONS
27 Digital Out 7 Overcurrent
1. External load impedance on Digital
Set: Digital Output 7 (pin 20) current
exceeded 15 mA.
Clear: Remedy the overcurrent cause
and use the VCL function Set_DigOut()
to turn the driver on again.
Digital Output 7 driver
Output 7 driver (pin 20) is too low.
will not turn on.
28 Motor Temp Hot Cutback 1. Motor temperature is at or above
Set: Motor temperature is at or above
the Temperature Hot parameter
setting.
Clear: Bring the motor temperature
within range.
Reduced drive torque.
the programmed Temperature Hot
setting, and the requested current
is being cut back.
2. Motor Temperature Control Menu
parameters are mis-tuned.
3. See Monitor menu » Motor:
Temperature and » Inputs: Analog2.
4. If the application doesn’t use a mo-
tor thermistor, Temp Compensation
and Temp Cutback should be
programmed Off.
29 Motor Temp Sensor Fault 1. Motor thermistor is not connected
Set: Motor thermistor input (pin 8) is at
the voltage rail (0 or 10V).
Clear: Bring the motor thermistor input
voltage within range.
MaxSpeed reduced (LOS,
properly.
Limited Operating Strategy), 2. If the application does not use a
and motor temperature
thermistor, Temp Compensation
cutback disabled.
and Temp Cutback should be
programmed Off.
3. See Monitor menu » Motor:
Temperature and » Inputs: Analog2.
31 Coil1 Driver Open/Short 1. Open or short on driver load. Set: Driver 1 (pin 6) is either open or
shorted.
Clear:
Correct open or short, and cycle driver.
ShutdownDriver1.
2. Dirty connector pins.
3. Bad crimps or faulty wiring.
32 EMBrake Open/Short 1. Open or short on driver load. Set: Electromagnetic brake driver (pin 5)
is either open or shorted.
Clear: Correct open or short, and cycle
driver.
ShutdownEMBrake;
2. Dirty connector pins.
ShutdownThrottle; 3. Bad crimps or faulty wiring.
FullBrake.
33 Coil3 Driver Open/Short 1. Open or short on driver load. Set: Driver 3 (pin 4) is either open or
shorted.
Clear:
Correct open or short, and cycle driver.
ShutdownDriver3.
2. Dirty connector pins.
3. Bad crimps or faulty wiring.
34 Coil4 Driver Open/Short 1. Open or short on driver load. Set: Driver 4 (pin3) is either open or
shorted.
Clear:
Correct open or short, and cycle driver.
ShutdownDriver4.
2. Dirty connector pins.
3. Bad crimps or faulty wiring.
PMC005
Terms:
kSI = key Switch Interlock
feT = field-effect Transistor
vCL = vehicle Control Language