REFRIGERANT R-22 PRESSURE CHECK

TM9 4120-423-14&P

REFRIGERANT R-22 PRESSURE CHECK

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THIS WORK PACKAGE COVERS:

Operational Check

Tools and Special Tools

Pressure Gauges

Servicing Manifold

Personnel Required

Direct Support Technician

Equipment Conditions

Air conditioner removed from shelter, if

necessary

Refrigerant R-22 system discharged (See

Refrigerant R-22 system purged (See

Any brazing/debrazing procedure completed

Refrigerant R-22 system recharged (See

OPERATIONAL CHECK

Except in cases where it is obvious that the Refrigerant R-22 charge has been lost, the first step in

troubleshooting problems in the refrigeration system should be to check discharge and suction pressures

under operating conditions. Check pressures as follows:

Turn the MODE SELECTOR SWITCH to OFF.

Connect individual pressure gages, or a refrigeration servicing manifold and hoses to the high

(discharge) and low (suction) service valves.

Open the low (suction) and high (discharge) service valves.

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