72 - Form No. 56043161 - Clean Track
®
L24
Display
Code
Fault Description Troubleshooting Action
10
Brush motor contactor coil K1
overload.
1. Check for wiring problems (short) on the coil circuit and repair wiring.
2. Check the coil resistance. The nominal resistance is 53 ohms for White Rogers
and100ohmsforAmetek.Ifresistanceisbelow45Ohms,replacethesolenoid.
11
Main vacuum contactor coil K2
overload.
1. Check for wiring problems (short) on the coil circuit and repair wiring.
2. Checkthecoilresistance.Thenominalresistanceis53ohmsforWhiteRogers,
and100ohmsforAmetek.Ifresistanceisbelow45Ohms,replacethesolenoid.
12
Auxiliary vacuum contactor coil K3
overload.
1. Check for wiring problems (short) on the coil circuit and repair wiring.
2. Checkthecoilresistance.Thenominalresistanceis53ohmsforWhiteRogers,
and100ohmsforAmetek.Ifresistanceisbelow45Ohms,replacethesolenoid.
13
Chemical pump M2 overload. Max
current load is .75 Amps.
1. Check for short circuits in the wiring and pump motor.
2. Disconnect the pump motor and run the machine to see if the wiring is shorted.
3. Check the pump motor to see if it is bad.
15
Solution pump motor circuit open
(**).
1. Checkfordisconnectedwiring,openinwiringordefectivesolutionpump.Repair
or replace.
2. Checkcontrolleroutputvoltage.Itshouldbe24V.If0V,replacethecontroller.
16 Brushmotorcircuitopen(**).
1. Checkfordisconnectedbrushmotors,openinwiringordefectivebrushmotor
solenoid load contact failure.
2. Check the negative supply cable at the brush motor for a wiring problem or
incorrectmodications.
17 Brush motor stuck closed.
Check the output from the control board. If it is 24 volts referenced to B+ when the
switchisoff,replacethecontrolboard.
18 Vacuummotorcircuitopen(**).
Checkfordisconnectedvacuummotorwiring,openinwiring,defectivevacuummotor
and vacuum contactor failure.
19 Vacuum motor stuck closed.
Check the output from the control board. If it is 24 volts referenced to B+ when the
switchisoff,replacethecontrolboard.
20 Solutionsolenoid1open(**).
1. Check for disconnected solenoid wiring or open in wiring.
2 IfthewiringisOK,replacethesolenoid.
21 Solution solenoid 1 stuck closed.
Check the output from the control board. If it is 24 volts referenced to B+ when the
switchisoff,replacethecontrolboard.
22 Solutionsolenoid2open(**).
1. Check for disconnected solenoid wiring or open in wiring.
2 IfthewiringisOK,replacethesolenoid.
23 Solution solenoid 2 stuck closed.
Check the output from the control board. If it is 24 volts referenced to B+ when the
switchisoff,replacethecontrolboard.
24 Brushcontactorcoilopen(**).
1. Check for disconnected coil wiring or open in wiring.
2 IfthewiringisOK,replacethecontactor.
25 Brush contactor coil stuck closed.
Check the output from the control board. If it is 24 volts referenced to B+ when the
switchisoff,replacethecontrolboard.
26
Main vacuum contactor coil open
(**).
1. Check for disconnected coil wiring or open in wiring.
2 IfthewiringisOK,replacethecontactor.
27
Main vacuum contactor coil stuck
closed.
Check the output from the control board. If it is 24 volts referenced to B+ when the
switchisoff,replacethecontrolboard.
28
Auxiliary vacuum contactor coil open
(**).
1. Check for disconnected coil wiring or open in wiring.
2 IfthewiringisOK,replacethecontactor.
29
Auxiliary vacuum contactor coil stuck
closed.
Check the output from the control board. If it is 24 volts referenced to B+ when the
switchisoff,replacethecontrolboard.
32 Solution pump motor stuck closed.
Check the output from the control board. If it is 24 volts referenced to B+ when the
switchisoff,replacethecontrolboard.
**SeeService Test Mode in this manual for further trouble shooting information.
***SeetheMain Control Programming Options section to activate the brush type selection function.
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