Tennant 7100, Service Manual

Page: 277 / 305

ELECTRICAL
4-109
7100 330695 (8 − 11)
CURTIS R PROPEL CONTROLLER TROUBLESHOOTING
LED
CODE
PROGRAMMER
LCD DISPLAY
EXPLANATION POSSIBLE CAUSE
1,1
Hardware Failsafe 2 output fault
1. Short in motor or in motor wiring.
2. Controller failure.
Hardware Failsafe 4 overcurrent fault
1. Short in motor or in motor wiring.
2. Controller failure.
1,2
Hardware Failsafe 1 EEPROM fault
1. EEPROM failure or fault.
Hardware Failsafe 3 main contactor fault
1. Main contactor welded.
2. Main contactor driver fault.
3. Main contactor coil fault.
Precharge fault precharge fault
1. Internal controller fault.
2. Low battery voltage.
HW Failsafe motor voltage fault
1. Motor voltage does not correspond to throttle
request.
2. M1 or M2 output shorted to B
− or B+.
3. Internal motor short.
4. Controller failure.
2,1 SRO SRO fault
1. Improper sequence of KSI, power enable, and
direction inputs.
2. Wrong SRO type selected.
3. Direction switch circuit open.
2,2 HPD HPD fault
1. Improper sequence of KSI, power enable, and
throttle inputs.
2. Misadjusted throttle pot.
2,3 Proc/Wiring fault
HPD fault present
for > 5 sec
1. Misadjusted throttle.
2. Broken throttle pot.
3. Broken throttle mechanism.
2,4 SPD Limit Pot fault speed limit pot fault
1. Speed limit pot wiper wire broken.
2. Broken speed limit pot.
3,1 BB Wiring Check
emerg. reverse wir-
ing fault
1. BB wire open.
2. BB check wire open.
3,2 EM Brake Drvr fault
electromag. brake
driver fault
1. Electromagnetic brake coil shorted or open.
2. Electromagnetic brake wiring open.
3,3 Throttle Fault 1 throttle fault
1. Throttle input wire open.
2. Throttle input wire shorted to B
− or B+.
3. Throttle pot defective.
4. Wrong throttle type selected.
4,1 Low Battery Voltage low battery voltage
1. Battery voltage <16 volts (24V models), <21V
(36V models), or <27V (48V models).
2. Corroded or loose battery terminal.
3. Loose controller terminal.
4,2 Overvoltage overvoltage
1. Battery voltage >36 volts (24V models), >48V
(36V models), or >60V (48V models).
2. Vehicle operating with charger attached.
4,3 Thermal Cutback
over − /under − temp.
cutback
1. Temperature > 95

C or < − 25

C
2. Excessive load on vehicle.
3. Improper mounting of controller.
4. Operation in extreme environments.