Specifications

54
STATUS CODE
-143
DESCRIPTION
No
MEMORY
RECALL
CONTROL
TYPE
Traction
Figure 1
Control motor current sensor input missing.
STATUS INDICATION CRITERIA
This status code is displayed when voltage between
PY7 and negative is less than .84 volts with no
current flowing in motor circuit.
SYMPTOM
Stall currents in SCR range higher than normal and
uncontrollable with C/L adjustment.
POSSIBLE CAUSE
Open sensor wire circuit to PZ3.
 Check for loose connections or broken wire (yellow
wire) from current sensor to PZ3 on logic card.
STATUS CODE
-144
DESCRIPTION
1REC did not turn off properly.
Yes
MEMORY
RECALL
CONTROL
TYPE
Pump
Figure 1
STATUS INDICATION CRITERIA
This status code is displayed when, during SCR
operation, 1 REC fails to turn off.
SYMPTOM
Forward or reverse contactors open and close, then can
only be closed by opening and closing the key switch.
POSSIBLE CAUSE
Defective 5 REC circuit.
 Check for shorted 5 REC.
 Check for shorted 5 REC snubber (25 REC).
Defective 2 REC circuit.
 Check for shorted 2 REC.
 Check for shorted 2 REC snubber (22 REC).
Open choke (1X).
 Check for open circuit between T5 and T3. Ohm
meter should read zero ohms.
1 REC defective.
 Turn off time for 1 REC out of specification. No
field test is possible. Replace 1 REC
after above checks, show no problem found.