Quantcast LOW SUCTION AND DISCHARGE PRESSURE - TM-5-4120-361-14_85

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INSUFFICIENT COOLING - TM-5-4120-361-14_84
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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
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Section III. GENERAL MAINTENANCE INSTRUCTIONS
TM 5-4120-361-14 Table 5-1. MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION 7. LOW SUCTION Step 2. Step 3. 8. HIGH SUCTION PRESSURE (See Table 6-1) AND DISCHARGE PRESSURE - Continued Check for indications of defective thermal expansion valve. Replace valve (para 5-28). Check for indications of defective quench valve. Replace valve (para 5-29). Step 1. Check for indications of defective thermal expansion valve. Replace valve (para 5-28). Step 2. Check for indications of defective quench valve. Replace valve (para 5-29). 9. HIGH HEAD PRESSURE (See Table 6-1) Step 1. Check to see if condenser coil is dirty. Step 2. Step 3. Step 4. Step 5. Step 6. Clean coil. Check condenser coil temperature gradient for indications of refrigerant overcharge. Discharge refrigerant (fig. 6-1) while observing head pressure and sight glass. Inspect or test condenser fan motor for defective operation. Repair motor (para 6-8). Inspect condenser louvers and actuating mechanism for correct adjustment and proper operation. Adjust and clean as necessary. Replace in operative components (para 5-20). Check for indications of defective quench valve. Replace defective valve (para 5-29). Check to see if the compressor is defective. Replace defective compressor (para 5-16). 5-5

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