AIRLESSCO slow stroker II 3600SL Operation Manual - Cause
18
CAUSE
SOLUTION
STEP 1: Ensure ON/OFF switch is in the "ON" position and the Pressure Control
Knob is fully CW (maximum pressure) and that the unit is plugged in.
STEP 2: Loosen the pressure control unit on the back of the machine. Check if the
green power light on the board is lit. If the light is "OFF", proceed to step 3. If the light
is "ON", go to step 7.
STEP 3: Use a multimeter to check for 110 volts across the L1 and L2 terminals on
the board. If there is no voltage at these leads. There is no power to the unit. Check
power source (outlet, breakers, extension cord and power cord.)
STEP 4: if the machine has power and the green light is "OFF", check to see if the
breaker has tripped (button protruding from breaker). Push to reset. If it doesn't reset
allow more time and push button in again. Replace thermal circuit breaker if it won't reset.
STEP 5: If the thermal circuit breaker is okay, disconnect the two red motor leads
(S1 & S2) and test for continuity between the two leads. Continuity shows that the motor's
thermal coupler has not tripped. No continuity means that the thermal coupler has opened
due to excessive motor heat. If the motor is still hot to touch, allow to cool and retest. If the
motor is cool and there is not continuity on the red leads, contact your local Leeson repair
facility to repair/replace the thermal coupler.
STEP 6: If all checks out fine in steps 1 through 5 and the green light is still out, the
pressure control unit (board) is defective and must be replaced.
STEP 7: If the green light is "ON", the power source, circuit breaker and thermal coupler
are okay. Use a multimeter to test the resistance between the red and black wires on the
sensor. This must be about 1.5-2.8 Kohms, Note: A bad sensor will usually show no resis-
tance (open). A second option is to substitute the sensor with another one.
STEP 8: With the machine still "OFF", remove the potentiometer lead from the pressure
control unit of the board and read the resistance between the red and black wires. This
must be 8 - 12 kohms. If outside this range, replace the potentiometer. Note: A bad pot
will usually show no resistance (open). A second option is to substitute the POT with
another one.
STEP 9: Remove the two black leads (A1 & A2) and test for continuity between them.
Continuity is an indication that the motor is sound. The lack of continuity, points to a
problem in the motor. If there is not continuity on these two leads, check the motor
brushes. Ensure that the brushes are evenly worn and make solid contact with motor
commutator. Replace the brushes if they are less than 5/8" long. If the brushes are okay,
replace the motor.
STEP 10: Complete the calibration procedures as shown on page 19.
STEP 11: If the unit fails to start while turning the pressure trimpot clockwise and
all other components test okay in Steps 1 - 10, install a new pressure control unit.
Pressure Setting
Power Source
Thermal Circuit
Breaker
Thermal Overload
Pressure Control
Unit
Sensor
Potentiometer
Motor
Pressure
Calibration
Pressure Control
Unit
TROUBLESHOOTING - Machine does not Start