31
- FORM NO. 56043115 - 34 RST
Control Panel
Error Description
Comments
E08
Solenoid Bank Coil Circuit
Overload
•
Brush Motor Contactor
(K1)
•
Vacuum Motor contactor
(K2)
•
Solution Solenoid
(L1)
The sum of the currents through these coils is too high
•
Inspect the “B-3” ground bus (J2-9 wire) at the controller
for negative battery voltage. This error will occur if B-3 is
disconnected.
•
If this error occurs when no coils are active (and J2-9 wire is
good), the control board is defective
•
Operate various combinations of coils to identify which coil is
causing the problem.
•
Check for wiring problems on the coil circuit(s) and repair wiring.
•
Check resistance on all contactor/solenoid coils. If the value is less
than 20% of the values below, replace the contactor/solenoid
•
Brush motor contactor coil
(K1):
98 to 120 Ω
•
Vacuum motor contactor coil
(K2)
: 102 to 120 Ω
•
Solution solenoid coil
(L1)
: ST 76 Ω
E017 Scrub deck lift actuator circuit
open (**)
The controller’s internal circuitry is not seeing any voltage change.
•
Inspect the B+2 bus (J2-7) and fuse
(F2)
for positive battery
voltage.
•
Check for disconnected actuator wiring or defective actuator
motor.
•
Check controller’s actuator output voltage. This is a switched
ground PWM, so one terminal will be 36 volts (B+2 bus) to
Battery-Negative and the other should be non-zero (PWM of B-2)
to Battery-Negative. If both remain near 36 volts, it indicates a
controller failure.
E018 Scrub deck lift actuator short
The controller’s internal circuitry is seeing maximum voltage in the
current sensing circuit.
•
Inspect the B-2 bus (J1-9) for connection to ground
•
Inspect the actuator wiring for short circuit(s)
•
Inspect the scrub deck for obstructions to movement
•
Check the lift actuator limit adjustment
E021 Brush motor circuit open (**)
The controller’s internal circuitry is not seeing any voltage change.
•
Inspect the current sense wire (white/gray) for continuity.
•
Inspect the brush motor contactor for proper operation.
•
Inspect the motor power circuit and cable connectors for open
circuits
E022) Scrub motor short
The controller’s internal circuitry is seeing maximum voltage in the
current sensing circuit.
•
Same troubleshooting as E06
E023) Vacuum motor circuit open (**)
The controller’s internal circuitry is not seeing any voltage change.
•
Inspect the current sense wire (orange) for continuity.
•
Check the vacuum motor contactor for proper operation
•
Inspect the motor’s power wiring for open circuit
E024) Vacuum motor short
The controller’s internal circuitry is seeing maximum voltage in the
current sensing circuit.
•
Same troubleshooting as E07