6.6.7 Replace STAT Sample
Monitor Timing: Monitor every 50 msec during interruption
(Instrument monitors when next STAT sample is analyzed whether previous STAT
sample is removed.)
Monitor Method: Photo interrupter incorporated is shaded by the light shield attached to the sample rack
drawer.
CA-500’s Action: Warning at each STAT sample analysis.
(1) Probable Cause
1. The STAT sample is not replaced.
2. The light shield cover was opened when replacing.
3. Defective light shield of sample rack drawer.
4. The sample rack drawer is not opened or closed.
5. Failure of solenoid valve assembly
6. Failure of PCB No. 6362
(2) Confirmation by the operator
1. Place the sampler rack drawer properly.
2. Remove the foreign matters.
(3) Confirmation by Service Engineer
1. Check the dirt on table rock mechanism and/or it is free of foreign matters.
2. Check whether the light shield is damaged or not on the sample rack drawer rear side.
3. If the signal on the pin 2 and pin 3 of the relay connector for solenoid assembly does not change even
photo interrupter is shaded by the light shield, the solenoid valve assembly or sensor is faulty.
4. If the above step 3 does not solve the trouble, short-circuit the pin 5 and pin 6 of CN112 on PCB No.
6362. If this solves the trouble, the wiring cord (wiring cord from CN19 on PCB No. 4086) is faulty. If
not, the PCB No. 6362 is faulty.
CA-500 Series S/M 6-25 Revised December 2001 8
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