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Table 4-1. Troubleshooting - continued - TM-5-4120-339-140077
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TM-5-4120-339-14 Air Conditioner Vertical Compact 9 000 BTU/HR 208 Volts 3-Phase 50/60 HZ Tierany Model TM9KV-208-3-60 Manual
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Table 4-1. Troubleshooting - continued - TM-5-4120-339-140079
TM 5-4120-339-14
Table 4-1. Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
INSUFFICIENT COOLING (continued)
Step 8.
Inspect and test pressure equalizer solenoid valve (paragraph 3-13c).
Repair or replace damaged or defective pressure equalizer solenoid valve
Step 9.
Clogged dehydrator
Replace dehydrator (figure 4-16).
Step 10.
Restriction in liquid line.
Open system and remove refrigerant (figure 4-2), purge system (paragraph 4-8),
evacuate  system  (figure  4-4),  and  recharge  the  system  with  refrigerant
4.
REFRIGERANT SYSTEM CONTINUOUSLY LOOSING REFRIGERANT
Step 1.
Using available leak detector, check refrigerant tubing and components for leaks.
Repair leaks if possible. Replace unrepairable tubing or components.
Step 2.
Check for defective pressure relief valve (paragraph 4-13).
Replace defective pressure relief valve.
5.
AIR CONDITIONER NOISY DURING OPERATION
Step 1.
Check air conditioner operating pressures for excessive refrigerant in system (table 4-3).
Release excess refrigerant from system until the proper charge is attained
Step 2.
Check for noisy compressor, indicating worn compressor bearings or insufficient clearance
between rotating compressor components.
Replace compressor (paragraph 4-22).
Step 3.
Inspect expansion valve and check superheat (paragraph 4-15).
Repair or replace damaged or defective expansion valve.
4-4

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