TM 5-4220-227-14
SYMPTOM INDEX
Symptom
Page
1.
Recompression chamber inner lock (I/L) fails to pressurize ....................................................................4-14
2.
Recompression chamber slowly loses air pressure ................................................................................4-16
3.
Recompression chamber over pressurizes ............................................................................................4-16
4.
Digital temperature gage fails to come on or indicates fault readings .....................................................4-16
5.
Communications system fails to function ...............................................................................................4-17
6.
Oxygen (O2) analyzer fails to function ...................................................................................................4-17
7.
Total electrical power failure ..................................................................................................................4-17
8.
Heater/chiller or scrubber fail to operate ................................................................................................4-19
9.
Heater/chiller fails to operate ..................................................................................................................4-19
10.
Chamber lights fail to illuminate..............................................................................................................4-20
11.
Depth gage indicates faulty pressure readings .......................................................................................4-20
NOTE
Prior to performing troubleshooting, assure that all electrical components are plugged into the power strip
and the power strip circuit breaker is not tripped. Check that power strip is plugged into the GFI and the
GFI is not tripped.
Table 4-2. Unit Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
RECOMPRESSION CHAMBER INNER LOCK (I/L) FAILS TO PRESSURIZE.
Step 1. Check primary inner lock depth gage, and isolator valve. Valve may be in off position
blocking pressure to the gage
Open primary II/L depth gage isolator valve.
Step 2. Check secondary I/L depth gage isolator valve. Valve may be in off position blocking
pressure to the gage.
Open secondary I/L depth gage isolator.
Step 3. Instruct tender inside I/L to inspect I/L door and door seal. An obstruction in doorway may
prevent the door from closing and forming a seal.
Instruct tender to remove the obstruction from the doorway and to close and hold
the door shut until pressure build-up of 0.5 FSW inside the I/L forces the door
seal to hold
4-14
