TM 5-4220-227-14Table 4-2. Unit Troubleshooting Procedures (Cont).MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION4.DIGITAL TEMPERATURE GAGE FAILS TO COME ON OR INDICATES FAULT READINGS (Cont).Step 2. Disconnect the temperature probe wires from the temperature probe (in chamber).Temperature gage reading should cycle up to display EEE (error reading).Replace probe and lead wires if cracked or insulation is dried out. If gage stillmalfunctions, report fault to Direct Support Maintenance.5.COMMUNICATIONS SYSTEM FAILS TO FUNCTION.Step 1. No communication with either lock.Check power to power strip. Ensure that communication box is plugged intopower strip. Check communication box fuses. If no power, replace box. Ifpower, go to next step.NOTETo gain access to fuses, raise cover lid and remove top panel on communication box.Step 2. Replace speakers.6.OXYGEN (O2) ANALYZER FAILS TO FUNCTION.Step 1. Set RANGE switch to BAT. TEST.If reading is outside limits, replace batteries.Step 2. Clean sensor cell contacts using pencil eraserIf malfunction continues, go to next step.Step 3. Replace sensor cell.If malfunction continues, notify Direct Support Maintenance of faulty analyzer.7.TOTAL ELECTRICAL POWER FAILURE.Step 1. Check external power source connection to the chamber Ground Fault Isolator (GFI).The 110 VAC, 60 Hertz power source connection may be broken causing total chamberelectrical power failure.Check that GFI TEST light is lit and RESET switch is in ON (up) position,4-17
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
