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Page Title: 14. CONTROL POWER (24 VDC) FAULT LIGHT (DS9) ON.
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ARMY TM 9-4120-381-14 NAVY EE-000- CA-MMA-010/7053-AC AIR FORCE TO 35E9-136-31 Table 4-2.  Unit Maintenance Troubleshooting - Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 14.  CONTROL POWER (24 VDC) FAULT LIGHT (DS9) ON. Step 1.  Check operation of transformer (T1). Test transformer (para 4-60).  Replace transformer, if defective. Step 2.  Check operation of control power faults relay (K19). Test relay (para 4-49).  Replace relay, if defective. Step 3.  Check operation of relay (K19) 11-pin socket. Test socket (para 4-50).  Replace socket, if defective. Step 4.  Check operation of suppression diode (CR4). Test diode (para 4-47).  Replace diode, if defective. Step 5.  Check operation of rectifier (CR1). Test rectifier (para 4-46).  Replace rectifier, if defective. 15.  COMPRESSOR STARTS NORMALLY, BUT CRANKCASE HEATER CIRCUIT BREAKER (CB2) SOON TRIPS. Step 1.  Check operation of circuit breaker (CB2). Test circuit breaker (para 4-62).  Replace circuit breaker, if defective. Step 2.  Check operation of compressor crankcase heater (CCH). Test heater (para 4-81).  Replace heater, if defective. 16.  SERVICE LIGHT (DS8) DOES NOT COME ON WHEN LIGHT SWITCH (S2) IS SET TO ON. Step 1.  Check operation of service light (DS8). Test light (para 4-65).  Replace bulb, guard or holder, if defective. Step 2.  Check operation of service light switch (S2). Test switch (para 4.58).  Replace switch, if defective. 4-30

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