Rapidlab 1200 Operator’s Guide: Troubleshooting 6-73
02087462 Rev. V
D78 Codes
D78 No Reagent Detected at CO-ox: 1
D78 No Reagent Detected at CO-ox: 2, 3
Problem Corrective Action
Fluid detector 3
(FD3), the CO-ox
sample chamber, or
both do not detect
wash reagent
during a
calibration.
• Perform the highlighted test(s) in
Diagnostics > Fluidic
Functions
.
• If the problem persists, select
Diagnostics > Fluidic
Functions > RCx
and look for obstructions in the CO-ox
sample path.
Remove obstructions.
• Repeat the RCx test to check flow through the CO-ox
sample path.
• Perform a leak test.
Refer to Performing the Leak Test‚ page 6-37. If the test
fails, check the tubing for leaks, and that the tubing is
correctly installed in the pinch valve, the O-rings are in
place, and the spring-loaded latch is closed. For
Rapidlab 1245 and 1265 systems, verify that the CO-ox
sample chamber is installed correctly.
• If no other D codes occur, replace the CO-ox sample
chamber.
• If the problem persists, call for technical assistance.
Problem Corrective Action
Fluid detector 3
(FD3), the CO-ox
sample chamber, or
both do not detect
wash reagent
during a wash
cycle.
2 after calibration
3 after sample
• Perform the highlighted test(s) in
Diagnostics > Fluidic
Functions
.
• If the problem persists, select
Diagnostics > Fluidic
Functions > RCx
and look for obstructions in the CO-ox
sample path.
Remove obstructions.
• Repeat the RCx test to check flow through the CO-ox
sample path.
• Perform a leak test.
Refer to Performing the Leak Test‚ page 6-37. If the test
fails, check the tubing for leaks, and that the tubing is
correctly installed in the pinch valve, the O-rings are in
place, and the spring-loaded latch is closed. For Rapidlab
1245 and 1265 systems, verify that the CO-ox sample
chamber is installed correctly.
• If no other D codes occur, replace the CO-ox sample
chamber.
• If the problem persists, call for technical assistance.
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