TM 10-4330-236-13&P
3-3. TROUBLESHOOTING - continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Refer to figure 3-2.
2. Drain valve handle does not rotate.
Attempt to drain water from sump at elbow (1) by opening drain valve (2). If no flow results:
Step 1. Check position of defrost door (3). Adjust door to increase heating of sump and water drain. Refer to
paragraph 2-6.
Step 2. Attempt to turn drain valve handle (4) to the OPEN position.
Step 3. If handle (4) does not rotate, notify unit maintenance.
Figure 3-2. Malfunction 2 Drain Valve Handle
3-3