• Never reset a breaker or replace a blown fuse without performing appropriate electrical testing
- A tripped breaker or blown fuse may indicate an electrical fault in the compressor. Energizing a
compressor with an electrical fault can cause terminal venting. Perform checks to rule out an electrical
fault.
• Disconnect power and use lock-out/tag-out procedures before servicing.
- Before removing the terminal cover or molded plug, check that ALL electrical power is disconnected from the
unit. Make sure that all power legs are open. (Note: The system may have more than one power supply.)
- Discharge capacitors for a minimum of two minutes
- Always use control of hazardous energy (lock-out/tag-out) procedures to ensure that power is not reconnected
while the unit is being serviced.
• Allow time for the compressor to cool before servicing.
- Ensure that materials and wiring do not touch high temperature areas of the compressor.
• Keep all non-essential personnel away from the compressor during service.
• For A3 refrigerants (R290) remove refrigerant from both the high and low sides of the compressor. Use a recovery
machine and cylinder designed for flammable refrigerants. Do not use standard recovery machines because they contain
sources of ignition such as switches, high- and low-pressure controls and relays. Only vent the R290 refrigerant into the
atmosphere if the system is in a well-ventilated area.
• Never use a torch to remove the compressor. Only tubing cutters should be used for both A2L and A3 refrigerants.
• Use an appropriate lifting device to install or remove the compressor.
• Never install a system and leave it unattended when it has no charge, a holding charge, or with the service valves
closed without electrically locking out the system.
• Always wear appropriate safety glasses and gloves when brazing or unbrazing system components.
• Charge the system with only approved refrigerants and refrigeration oils.
• Keep POE oils away from certain polymers (e.g., PVC/CPVC and polycarbonate) and any other surface or material
that might be harmed by POE oils. Proper protective equipment (gloves, eye protection, etc.) must be used when
handling POE lubricant. Handle POE oil with care. Refer to the Safety Data Sheet (SDS) for further details.
• Before energizing the system:
1. Securely fasten the protective terminal cover or molded plug to the compressor, and
2. Check that the compressor is properly grounded per the applicable system and compressor requirements.
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