Quantcast Table 3-2. Troubleshooting

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TM 55-1905-223-24-18-2
3-9. Troubleshooting . Table 3-2 lists the common fault conditions that may be found during operation
or maintenance of the equipment. Look for causes and do corrective actions in the order listed. This manual
cannot list every symptom that may show up, and it cannot list all of the possible causes and corrective actions.
If a symptom is not listed, or if it keeps up after you have performed the corrective actions, notify your
supervisor.
Table 3-2. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HALON SYSTEM
1. Halon system does not operate.
STEP 1. Check for defective valve on C02 actuator.
Replace valve (para. 3-13).
STEP 2. Check for defective time delay.
Replace time delay (para. 3-13).
STEP 3. Check for defective globe valve.
Replace defective globe valve, para. 3-13.
2. Individual halon cylinder does not operate.
STEP 1. Check for defective valve actuator on halon tank is defective.
Replace actuator (para. 3-13).
STEP 2. Check for defective halon tank valve.
Replace halon tank valve (para. 3-13).
3. Ventilation does not secure or alarms do not operate when pneumatic switches are actuated.
STEP 1. Check for defective pneumatic switch.
Replace pneumatic switch (para. 3-13).
4. Time delay not operating properly.
STEP 1. Check for defective time delay.
Replace time delay (para. 3-13).
5. System does not operate properly.
STEP 1. Check for defective actuator or discharge piping and/or damaged nozzles.
Inspect piping and nozzles for clogging or damage.
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