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Table 4-1. Troubleshooting - continued - TM-5-4120-339-140080
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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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Repairing Refrigerant System Leaks.
TM 5-4120-339-14
Table 4-1. Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
FANS DO NOT OPERATE (continued)
Step 4.
Continuity check fan motor circuit (figure 3-8).
Replace or repair defective wiring.
11.
UNIT DOES NOT OPERATE IN HEATING MODE
Step 1.
Continuity check heater circuit (figure 3-8).
Replace or repair defective wiring.
Step 2.
Inspect and test selector switch (paragraph 3-12b).
Replace damaged or defective selector switch.
Section III. Maintenance Procedures
4-4.
GENERAL MAINTENANCE PROCEDURES.
a. Removing and Installing Panels and Grilles.  Direct Support Maintenance of air conditioner components
normally requires the removal of panels and grilles to provide access to the interior of the unit, and installation of these
panels and grilles after maintenance has been accomplished. Refer to figure 3-3 for required removal and installation of
panels and grilles during accomplishment of Direct Support Maintenance.
b. Soldering and Brazing.
(1) Use a silver solder on all soldered connections of the copper tubing. Silver solder with a 50 percent silver
capacity and a melting point of approximately 1300F (704C) is recommended.
(2) Continually pass dry nitrogen through the tubing or connections being soldered or brazed to prevent the
formation of harmful copper oxides.
c.
Checking for Refrigerant System Leaks.
(1) Turn selector switch to "OFF" position and disconnect the air conditioner from the electrical power source.
(2) Refer to figure 4-5 and install pressure gages.
4-7

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