EPA Section 608 Universal Certification ExamType I (Small Appliances)Medium
A technician is recovering refrigerant from a small appliance using a self-contained recovery unit. What should be done with the appliance's compressor if it is still operating?
- ATurn off the compressor to prevent damage and ensure complete recovery.
- BAllow the compressor to continue running to assist in the recovery process.
- CBypass the compressor and recover directly from the high and low sides simultaneously.
- DCycle the compressor on and off intermittently to dislodge refrigerant.
Show answer & explanationAnswer & explanation
Correct answer: A. Turn off the compressor to prevent damage and ensure complete recovery.
If the appliance's compressor is operating, it should be turned off before recovery. This prevents damage to the compressor (especially as refrigerant levels drop) and allows the recovery unit to work efficiently without counteracting the appliance's compressor.
Why the other options are wrong
- B. Running the compressor can damage it as refrigerant levels drop and can impede the recovery machine.
- C. Bypassing the compressor might be part of the connection strategy, but it doesn't negate the need to turn it off first.
- D. Cycling the compressor is not a standard or safe practice for refrigerant recovery.
Operating Compressor During Recovery
Before recovering refrigerant from a small appliance, if its compressor is operational, it must be turned off to prevent damage and ensure effective recovery.
- Protects the appliance's compressor.
- Prevents counter-pressure against recovery unit.
- Ensures a more complete and efficient recovery.
- Applies to both self-contained and system-dependent recovery.
Memory trick: Compressor on? Turn it off, or recovery will scoff!