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Table 4-1. Troubleshooting - TM-5-4120-339-140076
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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-5-4120-339-140078
TM 5-4120-339-14
Table 4-1. Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
Inspect and test pressure equalizer solenoid valve (paragraph 3-13c).
Repair or replace damaged or defective pressure equalizer solenoid valve
3.
INSUFFICIENT COOLING
Step 1.
Check for insufficient refrigerant in system (bubbles in sight glass).
Add refrigerant (paragraph 4-11).
Step 2.
If adding refrigerant to the system does not clear up bubbles in sight glass, there may be air
in the system.
Open system and remove refrigerant (figure 4-2), purge system (paragraph 4-8),
evacuate  system  (figure  4-4),  and  recharge  the  system  with  refrigerant
Step 3.
Check for inoperative fans.
Perform corrective actions listed for malfunction 10 of this troubleshooting table.
Step 4.
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 5.
Inspect expansion valve and check superheat (paragraph 4-15).
Repair or replace damaged or defective expansion valve. Adjust expansion valve if
superheat is not correct (paragraph 4-15).
Step 6.
Inspect quench valve and check superheat (paragraph 4-16).
Repair or replace damaged or defective quench valve.
Adjust quench valve if
superheat is not correct (paragraph 4-16).
Step 7.
Inspect and test liquid line solenoid valve (paragraph 3-13d).
Repair or replace damaged or defective liquid line solenoid valve (paragraph 4-17).
4-3

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