TM 5-4220-227-14
Table 4-2. Unit Troubleshooting Procedures (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10. CHAMBER LIGHTS FAIL TO ILLUMINATE.
Step 1. Ensure that chamber lights are plugged into power strip.
Plug in if unplugged.
Step 2. Check fuses on the light power source.
Replace blown fuses.
Step 3. Listen for sound of fan on light source.
a.
If sound is heard, but there is no light, replace bulb.
b.
If no fan is heard, replace light source.
c.
If problem persists, notify Direct Support Maintenance.
11. DEPTH GAGE INDICATES FAULTY PRESSURE READINGS.
Step 1. Check ALP-013, ALP-015 and ALP-016the depth gage isolator valves. These valves may
be closed or malfunctioning.
Operate from full closed to full open several times. If valve is still malfunctioning,
notify Direct Support Maintenance.
Step 2. Equalize pressure in the I/L and O/L. All I/L and O/L depth gages (AGA-020, AGA-021,
AGA-017, AGA-018, AND AGA-019) should indicate the same pressure. Cross-check all
the gage indications to locate the faulty gage.
Replace the faulty gage.
4-20
