Roche cobas b 221 system

Roche Diagnostics May 2009
D-128 Service Manual · Version 9.0
7 Troubleshooting cobas b 221 system
Important test routines
Peltier BG output nOk –
Remedy: o Check cable plug from mainboard to BG module.
o Replace BG module.
Error message: Peltier fan BG input nOk –
Peltier fan BG output nOk –
Remedy: o Check BG fan for mechanical blockage.
o Check cable plug from mainboard to BG module.
o Replace BG module.
Heating ISE
Error message: Peltier ISE input nOk –
Peltier ISE output nOk –
Remedy: o Check cable plug from mainboard to ISE module.
o Replace ISE module.
Error message: Peltier fan ISE input nOk –
Peltier fan ISE output nOk –
Remedy: o Check ISE fan for mechanical blockage.
o Check cable plug from mainboard to ISE module.
o Replace ISE module.
Heating MSS
Error message: Peltier MSS input nOk –
Peltier MSS output nOk –
Remedy: o Check cable plug from mainboard to MSS module.
o Replace MSS module.
Error message: Peltier fan MSS input nOk –
Peltier fan MSS output nOk –
Remedy: o Check MSS fan for mechanical blockage.
o Check cable plug from mainboard to MSS module.
o Replace MSS module.
Heating SD
Error message: Peltier SD 37°C-BG nOk –
Peltier SD 37°C-ISE nOk –
Peltier SD 37°C-MSS1 nOk –
Peltier SD 37°C-MSS2 nOk –