Control System
26
Service Manual – SC1500
Troubleshooting
Fault Codes
The graphic display will show any error codes detected by
the A1 Control Board on the Information Screen as they
occur. The display will show the wrench icon
and the
two-digit fault code number. The example shown here,
03
,
is a speed control fault.
If more than one fault exists, the display will sequence through the fault codes at one-second intervals.
If the error is significant and results in a machine system shutdown, the graphic display will show the
Information Screen until next key switch cycle. Otherwise the Information Screen will be active only when
the Information Switch is pressed.
Fault Code Table
Display
Code
Fault Description
Conditions Needed to Set the Fault Code
03
Speed Control fault
The E1 Curtis Speed Controller is communicating a problem to
the A1 Control Board.
04
Scrub Deck Actuator overload
The Scrub Deck Actuator has drawn more than 4.5 amps.
08
Solution Solenoid overload
The Solution Solenoid Valve has drawn more than
approximately 1 amp.
09
Vacuum Contactor (SSR1) coil
overload
The Vacuum Contactor has drawn more than approximately 1
amp.
10
Brush Contactor (K2) coil overload
The Brush Contactor has drawn more than approximately 1
amp.
11
Detergent Pump overload
The Detergent Pump has drawn more than approximately 1
amp.
21
Detergent Pump driver fault
The driver IC for the Detergent Pump is reporting a fault;
current limiting or shutdown is in effect due to either a detected
over-current or over-temperature condition.
24
Deck Actuator driver fault
The driver IC for the Deck Actuator is reporting a fault; current
limiting or shutdown is in effect due to either a detected over-
current or over-temperature condition
30
Solution Solenoid open
The measured current was below the minimum value while the
Solution Solenoid should have been on.
32
Scrub Deck Actuator open
The measured current never exceeded the minimum threshold
while moving from one deck position to another (only valid
when the target position and the starting position switch states
should be different).
35
Brush Contactor (K2) coil open
The measured current was below the minimum value while the
Brush Contactor should have been on.
36
Vacuum Contactor (SSR1) coil
open
The measured current was below the minimum value while the
Vacuum Contactor should have been on.
37
Detergent Pump open
The measured current was below the minimum value while the
Detergent Pump should have been on.