ARMY TM 9-4120-380-14
NAVY EE-000-BA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-21
Table 4-2. Unit Maintenance Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
10.
FAULT RESET SWITCH (S12) DOES NOT RESET
Disconnect input power before performing internal electrical troubleshooting. Voltages used
can KILL.
Step 1. Check operation of reset switch (S12).
Test switch (paragraph 4.30) Replace switch if defective.
Step 2. Check operation of latching relay (K11).
Test relay (paragraph 4.37). Replace relay if defective.
Step 3. Check operation of latching relay (K11) 11-pin socket.
Test socket (paragraph 4.42) Replace socket if defective.
11.
DIRTY FILTER LIGHT (DS5) ON
Step 1. Check return air filter.
Clean filter (paragraph 4.26).
Step 2. Check operation of dirty filter relay (K7).
Test relay (paragraph 4.36). Replace relay if defective.
Step 3. Check operation of relay (K7) 11-pin socket..
Test socket (paragraph 4.42). Replace socket if defective.
Step 4. Check operation of dirty filter slave relay (K13).
Test relay (paragraph 4.40). Replace relay if defective.
Step 5. Check operation of airflow filter switch (S3).
Test switch (paragraph 4.55). Replace switch if defective.
4-26
