TM 5-3810-306-34
TABLE 3-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (CONTD)
Malfunction
Test or Inspection
Corrective Action
82.
LEVER LOCKOUT SYSTEM ACTIVATED. (CRANE NOT IN OVERLOAD OR TWO-BLOCK CONDITION).
Step 1. Hold HORN OFF/CLL-OVERRIDE switch to OVERRIDE position. If OK go to Step 2.
a.
Check crane electric or air system. (Refer to TM 5-3810-306-20.) Repair as needed.
b.
Check lever lockout system. (Refer to page 12-9.) Repair as needed.
Step 2. Fault in LMI system, cables, wiring or fu ses.
a.
Refer to Malfunction No. 83.
Step 3. Fault in Anti-Two-Block System.
a.
Refer to Malfunction No. 84.
83.
NO DISPLAY (LEVER LOCKOUT SYSTEM ACTIVATED).
Step 1. Check circuit breaker on Central Processor Unit (CPU). If OK go to Step 2.
a.
Reset Circuit breaker.
Step 2. Check voltage between Pin 2 and Pin 4 on CPU terminal board, terminal block X1; (Refer to page 3-64.) voltage
should be 24 Vdc. If OK go to Step 3.
a.
Check crane electrical system. (Refer to TM 5-3810-306-20.) Repair as n ecessary.
Step 3. Check voltage between Pin 2 and Pin 3 (ground) on CPU terminal board, terminal block X4; (Refer to page 3-65.)
voltage should be 24 Vdc. If OK go to Step 4.
a.
Replace/defective CPU. (Refer to page 14-4.)
Step 4. Check voltage between Pin 1 and Pin 2 on CPU main board, terminal block X1; (Refer to page 3-66.) voltage
should be 24 Vdc. If OK go to Step 5.
3-50
