Section IV. UNIT TROUBLESHOOTING PROCEDURES
4.9 UNIT TROUBLESHOOTING PROCEDURES.
Unit troubleshooting procedures listed in Table 4-2 cover the most common malfunctions that may be
repaired at the unit level. Troubleshooting procedures used by the operator should be conducted in
addition to the unit troubleshooting procedures. This manual cannot list all the possible
malfunctions or every possible test/inspection and corrective action. If a malfunction is not listed or
corrected by a listed corrective action, notify your supervisor.
Table 4-1. Symptom Index
No electrical power to laboratory (generator output switch on and power cable properly
Fluorescent light bulb fails to light (other bulbs in fixture light).
Emergency light fails to come on when normal power is lost.
No power available in laboratory.
Ceiling lights fails to operate.
Door blackout (micro) switch does not operate properly.
Convenience outlet (receptacle) inoperative.
A/C (ECU) remote control unit fails to operate properly (power available).
Environmental control unit fails to operate properly (power available).
Purge damper (intake, exhaust, or ECU intake) fails to operate.
Purge door limit switch fails to operate.
Exhaust blower does not operate when switch S2 is placed in the on position.
Leaks in vacuum-air pressure system.
Water pump fails to run (power available to motor).
Water pressure low due to leaks in the system.
Water pressure switch fails to operate properly.
Gas alarm system fails to operate or operates improperly.