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REFRIGERATION SYSTEM TROUBLESHOOTING - TM-9-4120-428-140235
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TM-9-4120-428-14 Air Conditioner Horizontal Compact 9000 BTU/HR 208 Volt Three Phase 400 Hertz Model No. F9000H-4SPFI Manual
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REFRIGERANT PRESSURE CHECK - TM-9-4120-428-140239
TM 9-4120-428-14
DIRECT SUPPORT MAINTENANCE
AIR CONDITIONER, HORIZONTAL, COMPACT
OVERHEATING CHECKS
INITIAL SETUP:
Equipment Condition
Unit operating in full COOL mode.
EXAMINATION
NOTE
Bubbles appearing in the sight glass OR a reduction in the cooling capacity is often
caused by an overheated refrigeration system. Adequate cooling of the hot, compressed
refrigerant vapor in the condenser is essential to the proper operation of the air
conditioner.
Painting coils wi ll cause overheating, thereby reducing the cooling capacity.
The following checks should be made to ensure that overheating is not the cause of the symptoms prior to troubleshooting the
pressurized portion of the refrigeration system.
a)
Be sure there is no external obstruction to the airflow into the condenser intake screen and out of the condenser fan
guard.
b) Be sure there is no obstruction within the intake screen and fan guard.
c) Be sure there are no obstructions or an excessive build-up of dust or dirt in the condenser coil.
NOTE
FOLLOW-ON MAINTENANCE:
Turn the unit OFF
END OF WORK PACKAGE
0073 00-1

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