TM 10-5410-228-24
2.8
UNIT LEVEL TROUBLESHOOTING PROCEDURES Continued.
21. NO HOT AIR WITH INTERNAL (ECV) POWER `HYD OIL TEMP' ALARM OFF Continued.
3
4
Gain access to ESS MODE
Does
Yes
selector switch.
continuity
Test for continuity on
exist?
contacts 11 & 12 section A.
No
Gain access to POWER
MODE selector switch
Does
Yes
Replace relay
(see para 2.13.24).
continuity
A4K10.
Test for continuity be-
exist?
tween terminals 3 and 8.
No
Replace ESS MODE selector
switch per para 2.13.23.
Does
No
Replace POWER MODE
continuity
selector switch.
exist?
Yes
Check front-to-back
Does
resistance of diode
No
diode check
Replace diode A4D9.
A4D9 with a diode
good?
tester.
Yes
Do continuity check of the electrical
wiring associated with components
A4S17, A4K10, SV7, & SV8 per
sheets 4 & 6.
Repair wiring as required.
2-72
