TM 5-4220-227-14SYMPTOM INDEXSymptomPage1.Recompression chamber inner lock (I/L) fails to pressurize ....................................................................4-142.Recompression chamber slowly loses air pressure ................................................................................4-163.Recompression chamber over pressurizes ............................................................................................4-164.Digital temperature gage fails to come on or indicates fault readings .....................................................4-165.Communications system fails to function ...............................................................................................4-176.Oxygen (O2) analyzer fails to function ...................................................................................................4-177.Total electrical power failure ..................................................................................................................4-178.Heater/chiller or scrubber fail to operate ................................................................................................4-199.Heater/chiller fails to operate ..................................................................................................................4-1910.Chamber lights fail to illuminate..............................................................................................................4-2011.Depth gage indicates faulty pressure readings .......................................................................................4-20NOTEPrior to performing troubleshooting, assure that all electrical components are plugged into the power stripand the power strip circuit breaker is not tripped. Check that power strip is plugged into the GFI and theGFI is not tripped.Table 4-2. Unit Troubleshooting Procedures.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1.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 positionblocking pressure to the gageOpen primary II/L depth gage isolator valve.Step 2. Check secondary I/L depth gage isolator valve. Valve may be in off position blockingpressure 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 mayprevent the door from closing and forming a seal.Instruct tender to remove the obstruction from the doorway and to close and holdthe door shut until pressure build-up of 0.5 FSW inside the I/L forces the doorseal to hold4-14
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