OICEW Task 4.3.U

Monitor refrigeration system

MMA Method

In order to satisfy NVIC 17-14 Task 4.3.U , MMA students must:

NVIC Method

See NVIC method.

STCW Competence Knowledge, Understanding, and Proficiency

Operate main and auxiliary machinery and associated control systems

OICEW-A4.3 Preparation, operation, fault detection and necessary measures to prevent damage for the following machinery items and control systems

Other auxiliaries including refrigeration, air- conditioning and ventilation systems
Condition Behavior Standard

On a vessel of at least 1,000 HP, on a simulator, or in a laboratory,

the candidate monitors an air- conditioning or refrigeration system.


All The assessment is required for all OICEW endorsements regardless of any limitations for propulsion mode and/or vessel equipment.

The candidate:

  1. Checks the compressor suction and discharge pressures and temperatures;

  2. Checks compressor crankcase oil level;

  3. Checks compressor oil pressure and control oil pressure if applicable;

  4. Checks condition of crankcase and compressor noise;

  5. Checks receiver level and liquid line sight glass condition;

  6. Checks liquid line temperature;

  7. Checks condition of suction accumulator if applicable;

  8. Checks oil separator oil return sight glass condition if applicable;

  9. Checks condensing cooling water pressure and inlet and outlet temperatures;

  10. For chillers, checks chilled water pump suction and discharge pressures and chiller inlet and outlet temperatures, as well as the chilled water expansion tank level;

  11. Checks refrigerated space temperatures as applicable;

  12. Checks supply air, return air, and air conditioned space temperatures as applicable; and

  13. Checks the compressor drive motor temperature.