Gilson 402 manual Mechanical Problems, Troubleshooting

Troubleshooting 7

Mechanical Problems

Mechanical Problems

Problem	Possible Cause	Solution
Valve does not fit on to the 402.	Valve axle not properly aligned	Ensure that the flat on the axle
	with the motor drive.	is aligned with the drive slot on
		the motor.
Valve moves during aspirate or	Valve mounting screw not tight.	Check that the mounting screws,
	dispense.	syringe and syringe mounting
		screw are all tight.
Syringe does not move properly.	Tubing blocked.	Check that the inlet tubing or
		transfer tubing is not blocked.
Valve sticks	Instrument left unused.	Remove the valve (see page 6-2).
		Use the valve key, reference
		F123674 to turn the valve axle
		and turn the key to free the valve.
		Do not try turning the axle with
		your fingers, it is not possible to
		apply the necessary torque.

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