Temperature Zone Fault (5890 Series II) question

[chemwipe]

Hello everyone...

I'm still working on this one 5890 Series II...I got this error:

FAULT: DET A TEMP RDG

I took the cover off of the ECD and saw that if the two wires were separated, then this error went away:



By the way...do everyone else's wires look like this?



So after this error went away, midway through my solvent blank, I get this:



Checking back in my maintenance log, last time I had a detector error like my initial error, I changed the oven sensor and the instrument was fine.

I know these heated zones are connected - what do you suggest I look at first to remedy this issue? Should I just go ahead and change the oven sensor?

NOTE: When I get this error, the oven fan turns off, and all the heated zones start to cool down.

Thanks in advance,
John

[AICMM]

Chemwipe,

Breaking my own rule here...

Don't mess with the oven sensor yet. The oven shuts off because an ECD has a thermal runaway protection circuit to prevent overheating the Ni63 source and putting radioactive Ni all over your lab. What you have is a dead detector heater RTD. You can replace just the part you have photo of and the instrument should come right back to life.

Best regards,

AICMM