6.1.2 Vacuum Pump Error
Monitor Timing: At time of rinse sequence is started and the sample probe has moved to the rinse cup
Monitor Method: The liquid sensor checks the error when rinse liquid has collected in the rinse cup.
CA-500’s Action: Emergency stop
(1) Probable Cause
1. The waste bottle is not connected.
2. The cap of waste bottle is removed.
3. SV failure
4. Vacuum pump failure.
5. Perforations (pinhole) in the hydraulic line.
6. Drive circuit failure.
(2) Confirmation by the Operator
1. Properly connect the tube.
2. Securely tighten the bottle cap.
(3) Confirmation by the Service Engineer
1. The vacuum pump operates only in rinse sequence. When the pump is operating and waste is not
flowed, tubing or SV might be failed.
2. When the pump does not operate, the pump or its drive circuit is failed. Measure voltage at the
connector of pump. If AC 100 V ± 15% is displayed when the pump is operating, the pump is failed; if
not, the drive circuit is failed.
3. Vacuum pump only operates when rinse cup liquid draining. Check the voltage in this timing.
CA-500 Series S/M 6-2 Revised December 2001 8
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