AIRLESSCO SL1500, Service & Operation Manual

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REPLACEMENT OF ELECTRICAL COMPONENTS
WARNING: ALWAYS UNPLUG THE ELECTRICAL CORD BEFORE SERVICING MACHINE!
NOTE: ANYTIME THE PRESSURE CONTROL ASSEMBLY, SENSOR, OR BOTH ARE REPLACED,
PERFORM THE CALIBRATIONS.
PRESSURE CONTROL ASSEMBLY
(ELECTRICAL CONTROL BOARD)
SENSOR
POTENTIOMETER
ON-OFF TOGGLE SWITCH
CIRCUIT BREAKER
1. Unplug machine's power cord.
2. Remove eight screws (Fig. 30, Item 33) and lower the
pressure control assembly.
3. Disconnect all leads from pressure control assembly.
4. Reassemble in reverse order.
1. Remove the screws (Fig. 30, Item 33) and lower the
pressure control assembly.
2. Disconnect sensor lead from the board.
3. Unscrew sensor (Fig. 25 Item 7) from pressure control
assembly using a 7/8" wrench.
4. Reassemble in reverse order. Use telfon tape on the
sensor threads prior to reinstalling it into the pressure
control assembly.
1. Lower pressure control assembly as described above.
2. Disconnect potentiometer lead from pressure control
assembly.
3. Use a 1/16" allen wrench, loosen set screw in the
potentiometer knob (Fig. 31, Item 13) and remove knob
and spacer. (Fig. 31, Item 12).
4. Using a 1/2" wrench or deep socket, remove the nut from
the potentiometer shaft assembly.
5. Pull entire potentiometer assembly out of the frame.
6. Replace in reverse order.
1. Lower the pressure control assembly as described
above.
2. Disconnect the two wires on the toggle switch
(Fig. 31, Item 4).
3. Use a 9/16" wrench to loosen the nut on the toggle
switch shaft.
4. Reassemble in reverse order.
1. Lower pressure control assembly as described above.
2. Disconnect the two wires on breaker (Fig. 31, Item 5).
3. Unscrew rubber boot (Fig. 31, Item 6) from breaker shaft.
4. Remove breaker from frame.
LIQUID CRYSTAL DISPLAY (LCD)
FIG. 32
1. Ensure that the power switch is OFF and that the
machine is unplugged.
2. Detach the pressure control assembly (Fig. 30) from the
frame by unscrewing eight screws (Item 33).
3. Disconnect the LCD lead from the the pressure control
assembly.
4. Separate the LCD assembly from the frame by undoing
the four screws (Fig. 32, Item 6)
5. Disassemble Items 1-6 (Fig 32)
6. Remove and replace LCD Display (Fig. 32 Item 3).
7. Reassemble in reverse order.
NOTE: DO NOT OVER TIGHTEN THE SCREW AND
NUTS (ITEM 1 & 6). THIS CAN WARP THE LCD AND
DAMAGE IT.
8. Perform "LCD Display Calibration Procedure".
See page 25.
PARTS LIST FIGURE 32
Item No. Part No. Description
1 117-128 Nut (4)
2 120-048 Plastic Washer (4)
3 331-337 Display Board Assy
4 117-281 Spacer (4)
5 331-360 Window
6 100-362 Screw (4)
331-304-99 LCD Kit PSI
331-305-99 LCD Kit BAR