Messages
Fault messages
Released: March 2004 6850 Series II GC User Information page 96 of 256
FAULT 233 Aux temp too hot
To clear the message, turn off all the heated zones, then turn the instrument
off and on again.
Possible causes: Defective aux heater
Defective main board
The aux zone’s temperature is higher than the maximum allowable
temperature (aux type maximum temperature plus 25 xb°C). Power is disabled
to the small heated zones and the oven.
FAULT 234 Aux temp sensor
Possible cause: Defective aux temp sensor
The auxiliary thermal zone’s temperature reading is lower than expected,
which indicates a shorted sensor. Power will be turned off for the zone.
FAULT 237 No line interrupt
Possible cause: Defective main board
The electronics on the main board are not functioning correctly. Power is shut
off to the oven and other heated zones. The GC will not be ready.
FAULT 238 Bad line interrupts
Possible causes: Excessive noise in the power supplied to the instrument
Defective main board
The main board detected an excessive amount of noise in the power supplied
to the GC. Power is shut off to the oven and other heated zones. The GC will
not be ready.
Turn the GC off and then on again. If the problem was caused by noise in the
power supply, the GC will operate normally again. If the error persists, the
main board is defective.
FAULT 239 No mux ADC response
FAULT 240 Mux ADC offset value
Possible cause: Defective main board
The multiplexer, which processes the GC’s electronic signals, is not
functioning. Most likely, the multiplexer’s circuitry is defective. Power is shut
off to the oven and other heated zones. The GC will not be ready.
FAULT 241 Invalid line sense
Possible cause: Defective main board
The line sense circuitry on the main board is not measuring the line power
correctly. Since it is indicating that the power supply is not within acceptable
limits, the power to the heated zones is disabled.
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