Clarke MA50 15B, Service Manual

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Electrical System
26
Service Manual – MA50 15B
Basic Troubleshooting
Problem Cause Correction
•
No Power
•
Power switch not in the ON
position
• Turn on the machine power
switch
• Batteries not connected • Connect battery connector
• Batteries completely dis-
charged
• Re-charge batteries
•
Defective Control PCB
•
Replace Control PCB
•
Defective Switch PCB
•
Replace Switch PCB
•
Vacuum motor does not work
•
Vacuum Circuit Breaker tripped
• Reset breaker
•
Defective Vacuum Motor
•
Replace Vacuum motor
•
Defective Control PCB
•
Replace Control PCB
•
Defective Switch PCB
•
Replace Switch PCB
• Brush Motor does not work
• Brush Circuit breaker is tripped • Reset breaker
•
Defective Brush motor
• Replace Brush motor
•
Defective Control PCB
•
Replace Control PCB
•
Defective Switch PCB
•
Replace Switch PCB
•
Defective trigger switch
• Replace trigger switch
•
Solution solenoid does not
open
•
Defective Solution solenoid
•
Replace Solution solenoid
•
Defective Control PCB
•
Replace Control PCB
•
Defective Switch PCB
•
Replace Switch PCB
•
Defective trigger switch
• Replace trigger switch
Troubleshooting Tips
•
The Control PCB is in control of the LED lights on the Switch PCB. So, if the LED light comes on next to the
switch on the Switch PCB, when you push the switch, you know the switch is OK, and the communication line
between the Control PCB and Switch PCB is OK.
•
Using the shop measurements below taken at the Control PCB, you can more accurately determine where the
trouble is.
Shop Measurements
Figure 1. Showing the motor spade terminals for the Vacuum motor and Brush motor.
Motor spade terminals