TM 5-4220-227-14
5-5. Direct Support Troubleshooting Procedures. Table 5-1 lists the common malfunctions that may be found during
operation. Refer to symptom index to locate the troubleshooting procedures for the malfunction. This manual cannot list
all malfunctions that may occur, nor all test or inspections and corrective actions. If a malfunction is not corrected by
listed corrective actions, notify your supervisor.
SYMPTOM INDEX
Symptom
Page
1.
Recompression chamber slowly loses air pressure ................................................... 5-4
2.
Recompression chamber overpressurizes ................................................................ 5-4
3.
Heater/chiller fails to function ................................................................................... 5-5
Table 5-1. Direct Support Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. RECOMPRESSION CHAMBER SLOWLY LOSES AIR PRESSURE.
Perform leak test on door seals, view ports, oxygen/air penetrator parts, heater/chiller/fluid and electrical
penetrator parts, accessory blanking plate parts, air supply and exhaust manifold penetrator parts, valves and
piping.
a. Repair or report malfunction to General Support Maintenance as required.
b. Make adjustments to air supply source to insure adequate air supply.
2. RECOMPRESSION CHAMBER OVERPRESSURIZES.
Step 1. Ensure that the ALP-005, ALP-006 I/L and ALP-009, ALP-010 O/L primary and secondary air supply
valves are closed and then check operation of ELP-007, ELP-008 I/L and ELP-011, ELP-012 O/L primary
and secondary air exhaust valves. These valves may be closed tight preventing any air flow through the
chamber.
Open ELP-007 and ALP-005, the primary exhaust valves. Adjust the valves to produce the
desired depth and flow rate.
Step 2. Check ALP-004 pressure relief isolator valve. This valve may be closed, preventing flow of pressure to
APR-004 the pressure relief valve.
Open ALP-004 pressure relief isolator valve. It should be secured in the open position with
safety wire.
5-2
