Quantcast Figure  4-20. Access to pressure cutout switches

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Figure  4-19. Thermostatic switch removal and installation
TM-5-4120-361-14 Air Conditioner Vertical Compact 18 000 BTU/HR 208 Volts 3 Phase 50/60 Hz (Model 18K 208 3 60) Manual
Figure  4-21. Drain tubes, (2) Refer to figure 4-21 and re- move clamps which hold plastic drain tubes  to  fittings. c. Inspection and Servicing. (1) Inspect tubes for cracks, ob- structions and loose connections. (2)  Clean  tubes  with  low  pressure compressed air or flush with water. d. Installation. (1) Refer to figure 4-21 and re- place tubes and clamp securely. (2) Refer to figure 4-1 and re- place the evaporator inlet louver. 4-36. Liquid Line Solenoid Valve, L1 a. General. The normally-open liq- uid line solenoid valve is electrically closed when the mode selector switch is turned to COOL. When the temperature control thermostat is satisfied, the liquid line solenoid valve opens placing the refrigerant system in the bypass condition. removal and installation - TM-5-4120-361-14_76
TM 5-4120-361-14 Figure  4-20. Access to pressure cutout switches (1) Using a multimeter, test for continuity between terminals 1 and 2 of each pressure cutout switch. (2) If continuity is not indi- cated, the pressure cutout switch is de- fective and must be replaced. Report to direct supprt maintenance for replace- ment of defective switch. 4-34. Compressor (See WARNING inside front  cover.) a.  General. The compressor is a hermetically sealed unit and is not reparable. An  inoperative  compressor is usually due to a mechanical failure causing the copressor to freeze, a con- trol failure, or motor burnout. Com- pressor replacement is required in all cases of mechanical or motor burnout. If the motor is defective report to di- rect or general support maintenance. b. Test. (1) Refer to figure 4-4 and remove the condenser cover and top rear cover. (2) Refer to figure 4-9 and remove condenser fan motor and the compressor electrical junction box. (3) Disconnect receptacle connec- tor from compressor junction box and re- move junction box cover. (4) Refer to wiring diagram (fig- ure 1-5) and test for continuity using a multimeter. Lack of continuity indi- cates an open winding. (5) Place one contact of the meter against the compressor housing and the other against the motor terminals, one at a time. If a circuit is indicated, the motor is grounded. 4-35. Condensate Water Drain Tubes. a. General. Refer to paragraph 2-4c(2). b. Removal. (1) Refer to figure 4-1 and remove the evaporator inlet louver. 4-31

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