TM 9-2540-205-24&P
TROUBLESHOOTING-CONTINUED
STEWART- WARNER 10560C24, 10560M, 10560M24B1, 10560G - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. HEATER DOES NOT START-Continued
Step 7. Check semiconductor device/diode mounting assembly (1) as follows:
a. Set multimeter for resistance measurements.
b. Place red multimeter probe on output terminal (2) and black probe on un-
marked lead (3). Note multimeter reading.
c. Reverse multimeter probes, and note reading.
One multimeter reading should be high and the other low. If both are high or
both are low, replace semiconductor device/diode mounting assembly
(10560C24 and 10560G, page 3-120; 10560M and 10560M24B1, page
3-122).
d. Place red multimeter probe on output terminal (2) and black probe on lead.4.
Note multimeter reading.
e. Reverse multimeter leads, and note reading.
One multimeter reading should be high and the other low. If both are high or
both are low, replace semiconductor device/diode mounting assembly
(10560C24 and 10560G, page 3-120; 10560M and 10560M24B1, page
3-122).
f. Place red multimeter probe on output terminal (2) and black probe on case of
blower motor (4). Note multimeter reading.
g. Reverse multimeter leads. Note multimeter reading.
One multimeter reading should be high and the other low. If both are high or
both are low, replace semiconductor device/diode mounting assembly
(10560C24 and 10560G, page 3-120; 10560M and 10560M24B1, page
3-122).
h. Reattach motor lead (5) to output terminal (2).
i. Reattach semiconductor device/diode mounting assembly (1) to case of
blower assembly (6) with screw (7) (10560C24 and 10560G only).
j. Install motor subassembly (10560M and 10560M24B1 only, page 3-11 1).
Step 8. Remove, and inspect burner assembly (10560C24 and 10560G, page 3-125; 10560M
and 10560M24B1, page 3-1 27).
a. If burner assembly is full of carbon, repair (page 3-131).
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