TM 9-4120-401-14
Table 4-2. UNIT TROUBLESHOOTING - continued
MALFUNCTION
TEST OR INSPECTION
C O R R E C T I V E ACTION
1.
AIR CONDITIONER DOES NOT START IN ANY MODE. - continued
Step 2. Make sure that correct power is supplied to unit. (See paragraph 4-3.)
Connect correct input power.
Step 3. Check to see if circuit breaker is tripped.
Reset to ON position.
Disconnect input power before performing internal electrical troubleshooting.
Voltages used can be lethal.
Use disconnect switch (NOT POWER CABLE) to disconnect power to unit.
Damage to cable connector pins will result if cable is used.
Step 4. Check for loose or damaged electrical connectors or damaged wires in wiring harnesses. (See
Tighten or replace connectors, or repair damaged wires.
Replace circuit breaker if defective.
Step 7. Check operation of EMI filter and rectifier assemblies.
Replace filter or rectifier if defective.
Step 8. Check for loose or damaged electrical connectors or damaged wires in wiring harnesses. (See
Tighten or replace connectors, or repair damaged wires.
Step 9. Check operation of the MODE selector rotary switch. (See paragraph 4-28.)
Replace switch if defective.
Step 10. Check that HIGH and LOW PRESSURE CUTOUT switches are not tripped.
PUSH TO RESET switch. If unit does not start, notify supervisor.
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