TM 10-5410-228-24
6.
NO AIR FLOW WHEN MISSION PROFILE SWITCH IS SET FOR STATIC MODE INTERNAL
POWER `STATIC' INDICATOR ON.
Turn ECV on.
Set ESS MODE switch to VENT.
Gain access to ECU front covers.
Turn override button on solenoid valve SV2
counterclockwise to open (see para 2.14.4).
Check for rotation of NBC fan or recirculation fan.
Does
No
NBC fan
rotate?
Yes
Does
No
recirculation
Push in override on SV9.
fan rotate?
Yes
Does
No Set ESS MOD
recirculation
switch to OFF.
Remove electrical connector plug from SV2.
fan rotate?
Check shaft
Test for 24 Vdc across connector plug pins.
coupling.
Yes
Replace SV2 (see
Is
Yes
24 Vdc
Check all fan speeds
present?
per para 2.14.5.d
No
Remove connector plug
from SV9.
Test for 24 Vdc across
connector plug pins.
Is
Replace SV9 (see
No
Yes
24 Vdc
present?
Check all fan speeds.
1
2
