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Page Title:
FAN DOES NOT OPERATE AT HIGH SPEED. (Cont) |
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 TM 9-2320-364-34-1
6. FAN DOES NOT OPERATE AT HIGH SPEED (CONT).
10.
TEST OPTIONS
KNOWN INFO
Unit Troubleshooting
Verify repair.
Does fan operate at high
tasks completed.
speed?
Fan operates at low speed.
REASON FOR QUESTION
EPAC controller OK.
Wire 1734 OK.
If fan operates at high speed,
LHS supply solenoid valve OK.
fault has been corrected.
LHS differential pressure
sensing valve OK.
Wire 1733 OK.
High speed fan lockout solenoid
valve OK.
High speed fan lockout
differential pressure
sensing valve OK.
Low speed fan differential
pressure sensing valve OK.
Fault not corrected.
NO
Notify supervisor.
POSSIBLE PROBLEMS
YES
Fault corrected.
2-238
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