ORGANIZATIONAL TROUBLESHOOTING - Continued
HUPP MF510B, MF510C, MF60A-24V, MF60B-24V - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. HEATER DOES NOT START- Continued
Step 11. Try to start heater (page 2-60).
a. If heater does not start, notify Direct Support Maintenance.
b. If heater starts, Install guard (page 2-32).
2. HEATER DOES NOT PURGE WHEN TURNED OFF
Step 1. Remove guard (page 2-32).
Step 2. Adjust flame detector switch (page 2-33).
Step 3. Start and stop heater (page 2-60), and wait for it to purge.
a. If heater still does not purge, notify Direct Support Maintenance.
b. If heater purges and operates properly, install guard (page 2-32).
3. HEATER DOES NOT START BELOW 40°F (4°C)
Step 1. Check for blocked air inlet or exhaust pipe.
Clear all passages to and from the heater (refer to applicable vehicle
technical manuals).
Step 2. Check for adequate fuel supply and fuel waxing or freezing,
Troubleshoot vehicle fuel system (refer to applicable vehicle technical
manuals).
Step 3. Check for proper voltage requirements (step 3, malfunction 1).
Step 4. Check for flooded heater (page 2-19),
Step 5. Remove guard (page 2-32).
Step 6. Clean fuel nozzle (page 2-39).
Step 7. Check for defective thermostat assembly (1) as follows:
a. Connect jumper wire between terminals 3 and 4 of terminal strip (2).
b. Start heater (page 2-60).
2-18
TM 9-2540-205-24&P
