ARMY TM 9-4120-380-14
NAVY EE-000-BA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-21
Table 4-2. Unit Maintenance Troubleshooting
Malfunction
Test or Inspection
Corrective Action
2. EVAPORATOR AND CONDENSER FANS BOTH RUN, BUT COMPRESSOR DOES NOT START AFTER TIME
DELAY
Step 1. Check operation of MODE SELECT switch (S1) (paragraph 4.28).
Set switch to OFF, then reset to COOL.
NOTE
Allow 10 seconds time delay before compressor starts.
Disconnect input power before performing internal electrical troubleshooting.
Voltages used can KILL.
Step 2. Check terminal boards (TB1 -TB2) (paragraph 4.43). Check for loose or damaged electrical connections
or damaged wires in wiring harnesses (figure FO-2.).
Tighten or replace connections and lugs (paragraph 4.43) If wires are damaged, contact Direct Support
Maintenance.
Step 3. Check operation of compressor timing relay (TR1).
Step 4. Check operation of compressor contactor (K1). Test contactor (paragraph 4.34). Replace contactor if
defective.
Step 5. Feel compressor to see if it is warm. If compressor is not warm, contact Direct Support Maintenance.
Step 6. Check operation of compressor (B1) (table 4-1, Step 11).
If not operating, contact Direct Support Maintenance.
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