TM 10-5410-228-24
2.8
UNIT LEVEL TROUBLESHOOTING PROCEDURES Continued.
18. NO COOL AIR FLOW (STATIC MODE, INTERNAL POWER) NO HIGH OR LOW PRESSURE
ALARM Continued.
1
2
Turn ECV off.
Check resistance of
Remove connector P1 of cable assembly
solenoid valves
1A4A1W3 from 1A4A1W1J3 (see para
RSV1 and RSV3.
Test for 1A4A1W3 wiring associated
with RSV1, RSV3, & SV4 for continuity
per Appendix F, Fig. F-4.
Does
Yes
resistance indicate
open circuit?
Is
Notify direct support to
No
No
continuity
repair cable assembly
present?
1A4A1W3.
Replace
solenoid coil.
Yes
Notify direct
Remove connector P1 of cable
support to check
assembly 1A4W6 from 1A4A1W1J1
refrigeration charge
(see para 2.13.27).
and restrictions in air
Test 1A4A1W1 wiring associated with
flow.
RSV1, RSV3, & SV4 for continuity
per Appendix F, Fig. F-4.
Is
Notify direct support
No
continuity
to repair cable
present?
assembly 1A4A1W1.
Yes
Remove connector P2 of cable
Notify direct
assembly 1A4W6 from 1A4A4J2
No
Is
support to repair
(see para 2.13.27).
continuity
cable assembly
Test 1A4W6 wiring associated with
present?
1A4W6.
RSV1, RSV3, & SV4 for continuity
per Figure 3-5, sheet 4.
Yes
4
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