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Chapter 4. DIRECT SUPPORT MAINTENANCE
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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-5-4120-339-140077
TM 5-4120-339-14
Table 4-1. Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
COMPRESSOR WILL NOT START (continued)
Step 3.
Inspect and test circuit breaker (paragraph 3-12m).
Replace damaged or defective circuit breaker.
Step 4.
Inspect and test thermostat (paragraph 3-12d).
Replace damaged or defective thermostat.
Step 5.
Inspect and test selector switch (paragraph 3-12b).
Replace defective or damaged selector switch.
Step 6.
Inspect and test compressor relay (paragraph 3-12f).
Replace defective or damaged compressor relay.
Step 7.
Inspect and test phase sequence relay (paragraph 3-12f).
Replace damaged or defective phase sequence relay.
Step 8.
Inspect for loose electrical connections and defective wiring (figure 3-8).
Tighten loose connections. Repair or replace defective wiring.
Step 9.
Inspect and test high and low pressure cut-out switches (paragraphs 3-13a and 4-12b).
Replace damaged or defective cut-out switch.
Adjust cut-out switch if out of
2.
COMPRESSOR SHORT CYCLES
Step 1.
Check air conditioner operating pressures for excessive refrigerant in system (table 4-3).
Release excess refrigerant from system until proper charge is attained (figure 4-2).
Step 2.
Inspect and test liquid line solenoid valve (paragraph 3-13d).
Repair or replace damaged or defective valve (paragraph 4-17).
4-2

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