CAIRE NewLife Elite, Техническое руководство, Страница: 39 / 49

MN240-1 Rev C
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6.0 Troubleshooting
6.1 Operating Pressure Test
Testing the operating pressure is a useful diagnostic tool when a concentrator produces low
oxygen concentration and requires servicing. Units functioning normally do not require
operating pressure tests.
Use the following procedure to test the operating pressure of the unit:
1.
Set the unit’s ON/OFF power switch to the OFF position and disconnect the power
cord.
2. Remove the right side panel.
3. Locate the pressure test port location (black tube with plug in the end). Remove
plug and using a pressure test port adapter (KI257-1), connect the pressure gauge to
the test port.
4. Connect the unit to power and set the unit’s ON/OFF power switch to the ON
position. Set the flowmeter to 8 LPM and allow the unit to run five minutes.
5. Observe the maximum and minimum readings on the pressure test gauge.
Elite units:
The maximum reading should not exceed 32 PSIG (220.6 kPa).
The minimum reading should not exceed 10 PSIG (69 kPa).
Intensity 8 or 10 units:
The maximum reading should not exceed 34 PSIG (234 kPa).
The minimum reading should not be less than 10 PSIG (69 kPa).
When you turn the unit on, the system pressure always registers
higher than normal for the first few minutes of operation.
6.1.1 High Operating Pressure
Higher than normal operating pressure may indicate any of the following:
•
A restrictive exhaust muffler, which does not allow the waste (purge) gas to
exit the system freely.
Operate the unit with the exhaust muffler disconnected to see if the operating
pressure returns to normal.
•
An improperly operating circuit board or solenoid valve.
Confirm that the circuit board and solenoid valves function properly.
•
Contaminated sieve beds.
Change the sieve beds.