Graco 257100, Operation

Page: 24 / 32

Troubleshooting
24 3A0245A
Unit Will Not Shut Off
Perform Pressure Relief Procedure; page 6.
Leave prime valve handle open and power switch OFF.
Troubleshooting Procedure:
Is the prime valve handle in the Prime/Tool Fill/Recirculation
position? Turn prime valve handle to Apply Finish position and
turn unit ON. Does the unit shut off?
Is the inline valve controller or box slide controller triggered?
If so, detrigger the controller. Does the unit shut off?
Replace Prime
Fill Tool reed
switch
NO
Disconnect the reed switch from the transmitter board
in the inline valve controller. Does the unit shut off?
Is an unwanted RF signal present?
If so, use BLOCK mode. Does the unit shut off?
Disconnect the reed switch from the transmitter board
in the box slide controller. Does the unit shut off?
Disconnect the tool fill reed switch from the motor
control board in the pump module control box. Does
the unit shut off?
Is the unit in Pressure Control Mode (asterisk will show on display)
with the box finishing tool attached? If so, switch the unit off for more
than one minute to reset the unit to the default Flow Control Mode.
Does the unit shut off?
NO
NO
NO
NO
NO
Is the unit in Pressure Control Mode (asterisk will show on display)
with the taper or corner finishing tool attached and Inline Valve
Controller triggered? If so, unplug the transducer from the motor
control board. Does the unit shut off?
NO
Replace the motor control board.
NO
END
YES
END YES
END YES
YES
YES
YES
Unit is functioning properly.
Reset unit to default Flow
Control Mode.
YES
Bad transducer.
Replace and test a
new transducer.
YES
Replace Prime
Fill Tool reed
switch
Replace Prime
Fill Tool reed
switch