Troubleshooting guide

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10.3 Removal and Connection of the Cable from the Base Unit:
Wait a minimum of 3 minutes after disconnecting power before servicing the MPC or pump motor.
Capacitors retain a charge even after power is removed from the controller.
1. Remove the 10 screws that are securing the cover to the side of the main unit.
2. CAUTION: The cover is wired and should be folded down gently being sure not to pull any of
the wires that are connected to it.
3. Make a note of what color lead is in each position of the terminal block “J14”. Lift each of the
levers on the terminal block “J14” and remove each lead.
4. Loosen the outer domed nut on the liquid tight, releasing the tension on the cable. Pull the cable
through the liquid tight. Thread the new cable through the liquid tight with enough length to
reconnect to the terminal block.
5. Prepare the end of the cable as per figure 5b on the following page. Ensure that the shield is fully
insulated until the point where it enters the terminal. No part of the shield should be allowed to
come in contact with the circuit board, equipment case, or any other surface.
6. Note that the black-green lead is not utilized at this end of the cable.
7. Referring to the notes taken earlier, connect each lead of the new cable to the proper position of
the terminal block, and then lock the lever back in place to hold lead. NOTE: It is recommended
that you insert and secure one lead at a time.
8. Tighten the dome nut of the liquid tight to secure/seal cable.
9. Replace cover carefully being sure not to crimp any of the cables/leads between cover and
enclosure and tighten screws.
10. Power the unit on, if all connections were properly made the unit will power as normal and the
display will show the start up screen.