Yale ESC030AC - Page 98

STATUS
CODE
DISPLAY MESSAGE RECOVERY METHOD CIRCUIT
29456-3, 4
(cont)
29456 Return to Neutral LH or RH Traction
Node 3 ( 4 )
DESCRIPTION BEHAVIOR
Motor Encoder Locked - (LH Node 4, RH Node 3) Traction speed limited to limp mode.
Probable Causes and Test Procedures
4. Check continuity and proper wiring:
a. Is there continuity between Pin 2 of encoder connector and Pin 13 of traction controller?
b. Is there continuity between Pin 3 of encoder connector and Pin 14 of traction controller?
YES- Proceed to step 5.
NO- Ensuring wiring is labeled per schematic diagram and check wire crimps in step 3.
5. Verify Encoder Power (with multimeter):
a. Disconnect encoder connector (CPS81/83).
b. Check for ~12V Volts across encoder connector Pin 1 and 4.
YES- Reconnect connector and proceed to step 6.
NO- Proceed to step 5c.
c. Disconnect CPS 41 and check for ~12V across traction controller Pins 25 and 5.
YES- Proceed to step 6.
NO- Controller likely failed - contact Service Engineering.
6. Verify encoder electrical signals:
a. Does encoder Pin 2, transition from 12V to 0V with wheel motion?
b. Does encoder Pin 3, transition from 12V to 0V with wheel motion?
YES- Proceed to step 6c.
NO- Encoder in motor is at fault, replace encoder / motor.
c. Does the signals on Pins 13 and 14 of traction controller transition from 12V to 0V with wheel mo-
tion?
YES- Proceed to Step 8.
NO- Proceed to Step 7.
Troubleshooting 2200 YRM 1415
94