TM5-6625-2694-l3&P
Table
5-1.
Direct
Support
Troubleshooting
(cont'd.)
MALFUNCTION
TEST
OR
INSPECTION
CORRECTIVE
ACTION
NO
LOAD
APPLIED
TO
ALL
FANS
RUNNING.
3.
for
full
forward
Step 1.
Visually
check
switches
all wind
movement.
Check
voltage
across terminals 24 and 25 of each
a.
should
be 0
Duct
terminal
strip.
Measurement
Load
VDC.
is 0 VDC on
b.
three
terminal
If measurement
all
strips, proceed to Step 3.
If measurement is 24
disconnect
power from
VDC,
Test Set.
terminals
Disconnect and
tag leads from
terminal
strip.
Remove Exhaust Guard
24 and
25 to
and
connect
Wind
Switch
leads
ohmmeter
across
Manually
terminals.
infinite.
Ohmmeter should read
wind switch vane forward.
move
Ohmmeter
should read
0 Ohms.
Switch if
d.
Refer to paragraph 5-6 and
replace
Wind
Step 2.
Thermal
Attach ohmmeter leads
terminal
of
across
Switch.
Ohmmeter should read 0 Ohms.
Refer to
paragraph 5-9 and replace
Thermal
Switch
if
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Change
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