TM-5-4310-389-14
Section V.
UNIT TROUBLESHOOTING PROCEDURES
3-15 GENERAL. This section will contain troubleshooting information for locating and correcting most of the operating
difficulties that may occur in the K-20; as authorized by the MAC (Maintenance Allocation Chart). Although this manual
cannot list all the malfunctions that may occur, nor all the test, inspections, and corrective actions, table 3-2 lists the
common malfunctions which you may find during the operation or maintenance of the K-20 Diving Equipment Set and its
components.
NOTE
Troubleshooting procedures listed below do not necessarily have to be performed in sequence.
Table 3-2. Unit Troubleshooting Procedures
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
COMPRESSOR
1.
Compressor will not load.
Step 1. Check to see if pressure relief valve is leaking or not closing properly. Adjust or replace.
Notify Direct Support Maintenance.
Step 2. Check to see if bleed valve is open. Close.
Step 3. Check to see if cartridges are not in purifiers. Notify Direct Support Maintenance.
2.
Compressor output low.
Step 1. Check to see if air intake filter is clogged. Clean.
Step 2. Check to see if condensate drain valves are leaking. Clean, tighten, and reset.
Step 3. Check to see if compressor is at rated speed. Notify Direct Support Maintenance.
3.
Low compressor oil pressure (shutdown).
Step 1. Check to see if oil lines are leaking. Repair/replace.
Step 2. Check to see if crankcase oil level is low. Add oil as required.
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