Trouble Shooting The Vacuum System - Maersk Container Industry Star Cool SCI-20 Operating And Service Manual

92 of 116 pages
14. Mount the black exhaust cover with its 4 screws and tighten to 3 Nm.
15. Drain oil from the vacuum pump by removing the lower black plug next to the sight glass.
If the sight glass is dirty, remove and clean it ensuring the o-ring is intact and seated correctly
before tightening with a 30 mm socket to 15 Nm.
16. Mount the black plug again and via the top black plug, fill up with 350 ml oil (item no.
818668A/818672A). This will exceed the maximum indicator of the sight glass.
17. Reconnect power to the unit and turn it on.
18. Go to the Service menu
19. Change the value of line M01 from Auto to Manual.
20. Go down to line M10 and change the value from Off to On.
21. Let the vacuum pump run for 5 minutes.
22. Go to the Information menu
between 20 mbar and 79 mbar.
23. If not within specified range, proceed with trouble shooting according to this manual.
24. Mount the vacuum pump cover and its 4 screws.
25. Active the CA PTI and confirm the change of filter and oil in the alarm 656 message screen.
Alternatively, go to the Service menu
and confirm the oil and filter change.

23.3 Trouble shooting the vacuum system

Note: Be aware of hot surfaces when handling the vacuum pump.
Note: Do not enter the container, including opening the inspection hatches, when the
oxygen level is below 20.9%.
The vacuum system consists of a membrane connected with a hose to a vacuum pump. Below you
will find a step-by-step method to determine the root cause of a vacuum fault. Please be aware
that there can be more than one problem in a vacuum system, and you might need to go through
the steps several times to eliminate the problem.
A vacuum fault can be caused by a single or combination of the following points:
• Insufficient amount of oil in the vacuum pump
• Overdue vacuum pump service
• Defective pressure transmitter (Pmem)
• Defect or leakage in the vacuum pump/filter
• Leak in hose, fittings, or connections
• Leak in membrane
Method to determine the cause:
1. Clear any active alarms before continuing with these steps.
2. Check the vacuum pump running hours in the Service menu
R08 Vacuum pump oil/filt. If the number of running hours is above or approaching 2000 and
will most likely reach 2000 during the next trip, perform a mandatory vacuum pump oil and
filter change.
3. If the vacuum pump oil and filter has not been changed, check that the vacuum pump oil level
is above minimum. Fill with the correct oil type (as specified in this Manual) until maximum
and select line S01 Manual operation.
and view line I18 Membrane pressure. The value should be
, S08 Maintenance, select line K01 Mpump oil/filter
, S04 Runtime counters, line