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CON: DIAG_FGAS_VALVE_CLOSED_
DETECTION_FAILURE
CON: DIAG_FGAS_TRANSDUCER_ FAILURE
CON: DIAG_O2_VALVE_MALFUNCTION
CON: DIAG_SYSTEM_ACTIVITY
Fault: Fresh gas step motor "closed"- sensor is not working properly.
Description: The step motor is demanded to close before zeroing of the inspiratory
fresh gas flow transducer, but no signal that the step motor is closed is detected.
Further attempts to perform zeroing is then made during next expiration phase.
Technical alarm will be activated if the "closed signal" is not detected during 3
consecutive attempts.
What to do:
1.
Check that the Inspiratory fresh gas valve tube is correctly mounted.
2.
Replace the Inspiratory fresh gas valve with PC 1751 step motor.
Fault: Fresh gas flow transducer is not working properly.
Description: The fresh gas flow transducer measures a flow despite the stepper
motor is closed. Refer to diagnostic DIAG_FGAS_FAILURE_NO_LONGER (201).
Technical alarm will be activated if the faulty situation remains 25 seconds.
This diagnostic log or technical alarm cannot come in non-rebreathing ventilation
modes.
This diagnostic log may appear now and then, but most of the time the software
corrects the problem automatically by doing an extra zeroing of the inspiratory fresh
gas flow transducer.
What to do: If appearing repeatedly or at technical alarm:
1.
Run a PuC to calibrate the inspiratory fresh gas flow transducer.
2.
Check that the inspiratory fresh gas valve tube is correctly mounted.
3.
If an external flowmeter is available, check that the inspiratory fresh gas
valve works properly by measuring the fresh gas flow at the auxiliary fresh
gas outlet. Set fresh gas flow to 5 l/min. Measured value 5 l/min ±15%.
4.
Replace the inspiratory fresh gas flow transducer.
5.
Replace PC 1748/PC 1797 Fresh gas flow transducer.
The measured fresh gas flow (1/10 ml/s) is presented in hexadecimal form.
Fault: Gas module - O2 valve is not working properly.
Description: The gas module delivers less than set flow. Reference flow <67% of the
"Set flow - 2 l/min" during 80 ms and 3 consecutive fillings.
If the gas combination is O2/N2O, the N2O valve will be closed to prevent filling with
only N2O.
Technical alarm will be sent and the diagnostic log will be repeted every 4 minute.
What to do: Replace the Gas module - O2 and check that the system delivers the
correct O2 concentration afterwards (to verify that correct O2-flow is generated).
Description: Diagnostic log required only for advanced debugging.
Pre-use check passed
Pre-use check failed
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