Haier GE Connect Series Service Manual page 50

Maintenance
Replacement of Compressor
1. Preparation
A. Prepare the components for replacement:
• Do not carry the compressors horizontally or upside down when carrying the compressors. Make sure the
lubricant inside the compressor doesn't pour out from the oil refrigerant ports. The suction and discharge
openings of the compressor must be sealed. Use tape for the openings if the rubber plugs are not
available.
Make sure the rubber
seals of the suction and
discharge openings of the
compressor are in good
condition.
• Before replacement, make sure the nameplates and models of the compressors are
NOTICE:
• Make sure the lubricant is sealed inside the compressors.
B. Prepare relevant tools:
• Prepare nitrogen. Please strictly follow the nitrogen welding standards during the welding process. Make
sure there is sufficient nitrogen. The nitrogen pressure should be above 2" to 3" W.C.
• Prepare brazing rods. Common brazing rod contains less than 5% silver. This material is used for brazing
copper to copper. The refrigerant ports of our compressor are made from copper-plated steel, so we must
use 15% brazing rod.
• Prepare applicable welding tools. Please evaluate how much oxygen and acetylene should be used
according to the current welding condition. Try to avoid repeated welding.
• Prepare a complete set of tools, including an internal hexagonal wrench, diagonal pliers, pincer pliers,
nipper pliers, a multimeter, a pressure gauge, phillips screwdriver, straight screwdriver, more than two
wrenches, insulating tape and wire ties.
2. Disconnect power
• If the compressor needs to be replaced after judging as above, then switch off the outdoor unit and
disconnect the power cable of the outdoor unit. Use insulating tape to wrap the power cable and put a
notice card on the power switch to remind people to be cautious of electric shock.
3. Preparation of electric components
• When you detach the compressor wires, temperature sensors and electric heaters, mark them
correspondingly for the convenience of reconnecting them.
4. Recover refrigerant
• Recover refrigerant from the system. Recover simultaneously from the high pressure side and low pressure
side. Do not recover too quickly; otherwise large quantity of lubricant will escape from the system together
with the refrigerant.
48
identical.
CONNECT SERIES SERVICE MANUAL
Make sure terminal box cover of the
compressor is in good condition.