Concentration Outside Tolerance Range; System Pressure Fault - Weinmann OXYMAT 3 Servicing And Repair Instructions

6.3 O

concentration outside tolerance range

2
If the check described in "5.3.9 Checking the O
concentration" on page 13 indicates an oxygen
concentration of less than 91% at a flow of 4 l/min
after 15 minutes operating time, proceed as
follows:
1. Check the system pressures as described in
"5.3.13 System pressure test" on page 17.
2. If the test described in "5.3.13 System pres-
sure test" reveals that the pressures are outside
the tolerance range, proceed as described in

"6.4 System pressure fault" .

If the system pressures are within the tolerance
range, continue with test step "5.3.14 Check-
ing the O system for leaks". If this check re-
2
veals leaks or faulty valves, repair them.
6.4 System pressure fault
Note:
The pressure values listed below refer to sea level. If the measurements are conducted at different altitudes, corre-
sponding correction factors must be taken into account.
Pressure measurement
Pressure measurement at
oxygen outlet
5
Pressure measurement at
O tank
2
(or at outlet of O system)
2
* Water uptake by the ADS container increases the flow resistance of the molecular sieve. As a result,
pressure equalization during the flushing phase is disturbed and the pressure increases.
2
Setpoint
Pressure
0.6 bar ± 0.1 bar
Measurement at 4 l/
min Pressure range:
– Min. 1.2 bar
+ 0.3 /– 0.2 bar
– Max. 1.65 bar
+ 0.3 /– 0.2 bar
– Then check the O
described in "5.3.9 Checking the O
centration".
– If the new check on O
sults in unsatisfactory values, perform anoth-
er system pressure test as described in
5.3.13. Then change the adsorption con-
tainers as described in section 7.11.
3. If the check on the oxygen system in accord-
ance with 5.3.14 reveals that there are no
leaks or faulty valves, continue as described in
"7.11 Replace adsorption containers (Mac
valves)".
4. Perform a functional check (see "5. Functional
check" on page 10).
Fault
Pressure-reducer defective,
Pressure too high
replace (7.15, page 54)
Leak at the connection points
between the pressure-reducer
and the oxygen outlet
Pressure too low
Repair leak.
Pressure-reducer defective,
replace (7.15, page 54)
ADS container has absorbed
water.*
Pressure too high
Replace the ADS container
(7.11, 7.12 and 7.13)
Leak at the connection points
between the suction filter and
Pressure too low
the O
Remedy the leak.
concentration again as
2
con-
2
concentration still re-
2
Cause/remedy
.
5
tank.
2
Troubleshooting
27