Accudyne Industries Milton Roy Milroyal Series, Инструкция по эксплуатации

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19 Installation, Operations & Maintenance Manual
4.4 PRINTED CIRCUIT BOARD (PCB)
REPLACEMENT
4.4.1 Removal of PCB (Figure 15)
1. Apply power and set pump stroke adjust knob to
0% setting or remove power and manually turn
the pump stroke adjust knob to 0% setting.
ALWAYS DISCONNECT
ELECTRICAL POWER FROM
THE PUMP MOTOR AND ECC BEFORE PERFORMING ANY
MAINTENANCE. FAILURE TO FOLLOW THESE INSTRUCTIONS
COULD RESULT IN DEATH OR SERIOUS INJURY.
2. Disconnect electrical power to ECC.
3. Disconnect ECC from its mounting bracket by
removing four mounting screws and pulling
unit.
4. Unscrew cover (280) from ECC.
5. Carefully loosen three captive screws equally
(do not completely remove screws) and gently
lift PCB from mounting standoffs.
6. Disconnect connectors J1, J2, J3, J4 and J5
from bottom of PCB.
Motor
Resistor
9 Pin
Motor
Connector
J1
J2
Standoff
Potentiomete
Assembly
3 pin
Connector
Worm Gear
FIGURE 14. Circuit Board Removed.
4.4.2 Installation of PCB
1. Connect connectors J1, J2, J3, J4 and J5 to
bottom of PCB.
2. Place PCB on three standoffs and carefully
tighten captive screws. Ensure nylon washers
are on captive screws between PCB and
standoffs.
3. Perform calibration B if board was calibrated
at factory or calibration C if board was not
calibrated at factory.
4.5 FEEDBACK POTENTIOMETER
REPLACEMENT
4.5.1 Removal of Feedback Potentiometer
1. Apply power and set pump stroke adjust knob to
0% setting or remove power and manually turn
the pump stroke adjust knob to 0% setting.
ALWAYS DISCONNECT
ELECTRICAL POWER FROM
THE PUMP MOTOR AND ECC BEFORE PERFORMING ANY
MAINTENANCE. FAILURE TO FOLLOW THESE INSTRUCTIONS
COULD RESULT IN DEATH OR SERIOUS INJURY.
2. Disconnect electrical power to ECC.
3. Remove PCB (Paragraph 4.4.1).
4. Remove two screws that secure potentiometer/
bracket/gear assembly. Remove feedback
potentiometer.
SECTION 4 - MAINTENANCE