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Table 4-1. TROUBLESHOOTING (cont.) - 506780092
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TM-5-4120-359-14 Air Conditioner Split Package 18 000 BTU/HR Cooling 30 000 BTU/HR Heating 208 Volt 3 Phase 400 Hertz Manual
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Table 4-1. TROUBLESHOOTING (cont.) - 506780094
TM 5-4120-359-14
Table 4-1. TROUBLESHOOTING (cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4.
Check compressor motor thermal protector switch S8.
(a) Remove power.
(b) Disconnect P10 connector.
(c) Test for continuity between J10 pins D and E. Resistance should be less than two ohms.
(d) If it is less than two ohms, go to step 5.
(e) Allow one hour for compressor to cool and switch S8 to reset.
If S8 resets, determine reason for compressor overheating. If S8 does not reset - change
compressor.
Step 5.
Check condenser blower motor thermal protector switch S7.
(a) Remove power.
(b) Disconnect P11 connector.
4-11

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