Graco 257100, Операция

Страница: 20 / 32

Troubleshooting
20 3A0245A
Drywall feed pump does not
run at all Check transducer or transducer
connections (control board is not
detecting a pressure signal). 1. Turn unit OFF and disconnect power.
2. Check transducer and connections to control board.
3. Disconnect transducer from control board socket.
Check to see if transducer and control board
contacts are clean and secure.
4. Reconnect transducer to control board socket.
Connect power, turn unit ON, set pump to PRIME
position, and turn control knob 1/2 turn clockwise. If
drywall feed pump does not run, turn unit OFF and
go to next step.
5. Connect a confirmed working transducer to control
board socket.
6. Connect power, turn unit ON, set pump to PRIME
position, and turn control knob 1/2 turn clockwise. If
drywall feed pump runs, install new transducer.
Replace control board if unit does not run.
7. Check transducer resistance with ohmmeter (less
than 9k ohm between red and black wires and 3-6k
ohm between green and yellow wires).
Digital display shows E=03
Control board status light
blinks 3 times repeatedly
TYPE OF PROBLEM WHAT TO CHECK HOW TO CHECK