Roche Diagnostics May 2009
D-44 Service Manual · Version 9.0
7 Troubleshooting cobas b 221 system
Module stops
o Replace the PolyOX-KX control board.
e
For instructions, see Replacing the PolyOX-KX control board on page B-53.
Error 20069 "COOX HW error"
The supply voltage of the COOX module falls outside the specified range.
o Turn the instrument off, wait at least 3 minutes, and turn it back on.
o Replace the PolyOX-KX control board.
e
For instructions, see Replacing the PolyOX-KX control board on page B-53.
Error 20071 "COOX HW error"
A communications problem occurred at the microcontroller of the COOX module.
o Turn the instrument off, wait at least 3 minutes, and turn it back on.
o Replace the Polychromator Bilirubin.
e
For instructions, see Replacing the Polychromator Bilirubin on page B-54.
o Replace the PolyOX-KX control board.
e
For instructions, see Replacing the PolyOX-KX control board on page B-53.
Error 20072 "COOX temperature nOk"
The temperature of the cuvette holder falls outside the specified range.
o Turn the instrument off, wait at least 3 minutes, and turn it back on.
o Check cable press fit of the COOX connector cable on the mainboard for damage.
e
For details, see Figure Mainboard connectors on page B-90.
o Call up component test and check the COOX temperature.
h [System] > [Component test] > [Control sensors] > [Temperature control] >
[Temperatures COOX].
COOX temperature not ok –
O Replace the cuvette holder.
e
For instructions, see Replacing the cuvette holder on page B-58.
O Replace the HSIN board.
e
For instructions, see Replacing the HSIN board on page B-61.
o Replace the mainboard unit.
e
For instructions, see Replacing the Mainboard unit on page B-89.
Error 20073 "HW test error Hemolyzer"
An error was recognized in a hardware component of the Hemolyzer.
o Verify drying of the hemolyzer tubing visually.
o Perform vacuum system test.
e
For instructions, see Vacuum System on page D-101.
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