Roche Diagnostics May 2009
D-42 Service Manual · Version 9.0
7 Troubleshooting cobas b 221 system
Module stops
Errors 20048...20050 "ISE temperature nOk"
The temperature of the ISE measuring chamber falls outside the specified range.
o Turn the instrument off, wait at least 3 minutes, and turn it back on.
o Call up component test and check the ISE temperatures.
h [System] > [Component test] > [Control sensors] > [Temperature control] >
[Temperatures ISE].
ISE temperatures not ok –
O Replace ISE measuring chamber.
e
For instructions, see Replacing the ISE measuring chamber on page B-42.
o Check cable press fit of the ISE connector cable on the mainboard for damage.
e
For details, see Figure Mainboard connectors on page B-90.
o Replace the mainboard unit.
e
For instructions, see Replacing the Mainboard unit on page B-89.
Error 20051 "ISE temperature nOk"
The temperature of the ISE measuring chamber 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 ISE 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 ISE temperatures.
h [System] > [Component test] > [Control sensors] > [Temperature control] >
[Temperatures ISE].
ISE temperatures not ok –
O Replace ISE measuring chamber.
e
For instructions, see Replacing the ISE measuring chamber on page B-42.
O Replace the ISE sensor contact (SCon).
O Replace the mainboard unit.
e
For instructions, see Replacing the Mainboard unit on page B-89.
o Call up general hardware test to check function of fan unit and if necessary replace
h [System] > [Diagnostics] > [General hardware test].
e
For instructions, see Replacing the main fan unit on page B-110.
Error 20053 "ADC error ISE"
Signal acquisition could not be performed due to a hardware error.
o Turn the instrument off, wait at least 3 minutes, and turn it back on.
o Check cable press fit of the ISE connector cable on the mainboard for damage.
o Replace the ISE measuring chamber.
e
For instructions, see Replacing the ISE measuring chamber on page B-42.
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