ORGANIZATIONAL TROUBLESHOOTING - Continued
HUPP MF510B, MF510C, MF60A-24V, MF60B-24V - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. HEATER DOES NOT START-Continued
b. Visually inspect igniter for corrosion or pitting.
If igniter has excessive corrosion or pitting, replace (page 2-35).
c. Set multlmeter for resistance measurements.
d. Place multimeter probes across igniter terminal (1) and case (2).
If multimeter reading is less than 3.4 ohms or more than 4.2 ohms,
replace igniter (page 2-35)
Step 8. Adjust flame detector switch (page 2-34).
Step 9. Check for defective flame detector switch (3) as follows:
a. Disconnect all leads(4) from the NO and the NC terminals on the flame
detector switch (3).
b. Place one multimeter probe on each terminal marked NO.
If multimeter reading is greater than 1.0 ohm, replace flame
detector switch (page 2-33).
c. Place multimeter probe on each terminal marked NC.
If multimeter reading is less than 1.0 ohm, replace flame detector
switch (page 2-33).
Step 10. Clean fuel nozzle (page 2-39).
TM 9-2540-205-24&P
2-17
