Daikin EWTP400MBYN [396/452] Procedure to protect compressor in case of frozen evaporator

Превью страниц Страница 396 / 452

Procedure to Protect Compressor in Case of Frozen Evaporator ESIE05-07

3–40 Part 3 – Troubleshooting

5.2 Procedure to Protect Compressor in Case of Frozen Evaporator

If water is detected in the compressor after a evaporator damage, the following procedure should be

executed within the first days.

1. Supply the compressor crank case heater.

2. Insulate the compressor from the rest of the refrigerant circuit. If there is no suction valve availa-

ble on the compressor, use a plate to close the suction of the compressor.

3. Open de oilplugs on the discharge and suction side to drain the oil and the water out of the

compressor.

4. Blow dry nitrogen through the compressor using the service ports on the HP and LP side of the

compressor.

5. Close the drain plugs and vacuum the compressor for a few hours while the crank case heater is

on.

6. If the vacuum oil becomes coloured (milky colour) replace the vacuum oil

7. Repeat step 6 each time the vacuum oil becomes milky.

8. After 4 hours break the vacuum using step 3.

9. Repeat step 5 till step 7 until the oil of the vacuum pump stays clear.

10. If the vacuum oil remains clear fill the compressor with the necessary compressor oil.

11. Charge the compressor with nitrogen.

ESIE05-07.book Page 40 Wednesday, October 11, 2006 10:42 AM