If the combination moisture indicator and sight glass indicates an accumulation of moisture within the system, which of the listed procedures would be the most practical to follow?

Question

Accepted Answer

Close the king valve, pump down the system, isolate the drier, remove the desiccant core and replace with new drier cartridge.

Answer

Purge the entire system to the atmosphere, replace the drier cartridge, and recharge the system with refrigerant.

Answer

Secure the system, disassemble and de-ice the thermostatic expansion valve.

Answer

Using a vacuum pump, draw the entire system down to 1,270 microns for a period of three hours.

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