Mindray WATO EX-55Pro, Service Manual

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that when the D/A value is small, the PEEP valve has a non-responsive area. If the D/A
value is smaller than the range, the PEEP valve cannot be turned on and the output
volume is always 0. If the D/A value is larger than the range, the output pressure
increases as the D/A value increases. The inspiratory valve has the same situation.
3. For details about subsequent diagnosis rules, see section 8.5.7 Diagnosing Inspiratory
valve Exceptions.
8.6 Gas Source and Drive Gas Faults
The following table lists the faults related to the gas source and drive gas.
Failure Description Possible Cause Recommended Action
Leak The gas supply pipeline
or the connector seal is
damaged. Replace the gas supply pipeline or connection
seal.
The quick connector has
leak problems. Replace the quick connector or PU tube. If
the PU tube is not damaged and long enough,
cut off a small segment that is in contact with
the quick connector and then insert the PU
tube.
The pipeline gas supply
interface has leak
problems. Check whether the check valve of the
pipeline gas source has leak problems in the
reverse direction. Replace the check valve if
necessary. Check and replace the damaged
seal on the gas supply interface. If the
problem persists, replace the pipeline gas
supply interface.
The reading on the
pipeline pressure
gauge is inaccurate
or not displayed. The pipeline pressure
gauge is damaged. Replace the pipeline pressure gauge.
The reading on the
pipeline pressure
gauge fluctuates
sharply. The filter of the pipeline
gas supply interface or
the PU tube of the
pipeline pressure gauge
is blocked, or the
pressure gauge is
damaged. 1. After confirming that the pipeline pressure
is stable, check the PU tube of the pipeline
pressure gauge and the filter of the pipeline
gas supply interface. If the PU tube or filter is
blocked, replace it.
2. If the problem persists, replace the pipeline
pressure gauge.