TM 5-4220-225-14
5-5. Direct Support Troubleshooting Procedures . Table 5-1 lists the common malfunctions that may occur during
operation. Refer to the symptom index to locate the troubleshooting procedures for the malfunction. This manual cannot
list all malfunctions nor all the corrective actions. If a malfunction is not corrected by the listed corrective actions, notify
your supervisor.
SYMPTOM INDEX
Symptom
Page
1. Loss of communication, all divers ............................................................................................ 5-2
2. Loss of communication, one diver ........................................................................................... 5-2
3. Weak or intermittent sending and receiving, one diver ............................................................ 5-3
4. Topside does not receive, one diver......................................................................................... 5-3
5. One diver does not receive topside.......................................................................................... 5-3
6. Leak in viewport assembly ....................................................................................................... 5-3
7. Leak between helmet shell and base ....................................................................................... 5-4
Table 5-1. Direct Support Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. LOSS OF COMMUNICATION, ALL DIVERS.
Step 1. Check communication box.
Repair damaged box (para. 5-16).
Step 2. Check communications whip.
Replace damaged communications whip (para. 5-13).
Step 3. Inspect umbilical communication cable.
Replace damaged umbilical (para. 4-31).
2. LOSS OF COMMUNICATION, ONE DIVER.
Step 1. Check communications box.
Repair damaged communications box (para. 5-16).
Step 2. Check communications whip.
Replace damaged whip (para. 5-13).
5-2
