Control System 51Service Manual – SC6500
™
Display
Code
Error/Fault Description Correction
34
L1 Solution solenoid short to ground 1. Disconnect the L1 solenoid coil wiring (wire colors
VIO and YEL/GRN) and check to see if the code
disappears.
− If the code disappears, replace the solenoid valve.
− If the code does reappear, test the wiring for a short
back to the battery ground. Repair or replace the
defective wire.
2. If the above test doesn’t remove the code, substitute
a new A2 control board assembly.
35
Solution control pump open 1. Check for an open circuit in the M12 pump motor and
wiring (wire colors VIO and BLU/ORN).
2. Test for 36V at the pump motor. If 0 Volts, check the
A2 control board assembly.
36
Side broom motor contactor coil
open
1. Check for open circuit in the K6 coil and wiring (wire
colors VIO and BRN/BLK).
2. Test for 36V at the K6 coil. If 0 Volts, check the A2
control board assembly.
37
K6 Side broom motor contactor coil
short to ground
1. Disconnect the K6 coil wiring (wire colors VIO and
BRN/BLK) and check to see if the code disappears.
− If the code disappears, replace the K6 contactor.
− If the code does reappear, test the wiring for a short
back to the battery ground. Repair or replace the
defective wire.
2. If the above test doesn’t remove the code, substitute
a new A2 control board assembly.
38
Side broom actuator motor open 1. Use an ohmmeter to check for an open circuit in the
M4 side broom actuator and its wiring (wire colors
GRA/VIO and GRN/ORN). If defective, repair or
replace.
2. Test for 36V at side broom actuator. If 0 Volts, check
the A2 control board assembly.
39
Auxiliary motor contactor coil open 1. Check for an open circuit in the K5 coil and wiring
(wire colors YEL/BRN and BLK/ORN).
2. Test for 36V at the K5 coil. If 0 Volts, check the A2
control board assembly.
40
K5 Auxiliary motor contactor coil
short to ground
1. Disconnect the K5 coil wiring (wire colors YEL/
BRN and BLK/ORN) and check to see if the code
disappears.
− If the code disappears, replace the K5 contactor.
− If the code does reappear, test the wiring for a short
back to the battery ground. Repair or replace the
defective wire.
2. If the above test doesn’t remove the code, substitute
a new A2 control board assembly.
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