Navigator 600 Phosphate
Multi-stream
Appendix C – Troubleshooting
74
IM/NAV6P/MS–EN Rev. F
C.3.3 Chemistry and Color Generation Errors
C.3.4 Zero and Secondary Calibration Valve Malfunction
Symptom
Action
Reagent order
For correct chemistry and color generation to take place in the reaction block area, the reagents must
enter the reaction block in the correct order:
1. Check that each reagent is contained in the correct color-coded reagent bottle – see Fig. A.1,
2. Check that each reagent tube is inserted in the correct reagent bottle (see Fig. 3.1, page 8)
Reagent flow rates
For correct chemistry and color generation to take place in the reaction block area, the reagents must
flow correctly.
To check flowrates:
1. Remove the 2 reagent tubes from the reagent bottles.
2. Increase the reagent pump speed to 10 rpm – see Section 8.4, page 51.
3. Check the air / reagent interface is moving up each of the reagent tubes at the same rate. If one or
more is moving more slower than the others:
a. Check the pump capstan for damage.
b. Check the pump tube assembly is sealed correctly. If necessary, remove and refit the relevant
assembly, ensuring the O-rings are wetted.
c. Initiate a manual clean sequence to remove any possible partial blockages.
Check / Symptom
Action
Calibration valve
malfunction
Check the zero and secondary calibration valves:
1. Manually energize the zero calibration valve – see Section 8.4, page 51 ('Manual Test Settings').
2. Check that the LED on the main board is lit and that there is an audible click from the solenoid
valve.
3. Repeat steps 1 and 2 for the secondary calibration valve.
