Maritime Geothermal Compressor W-140-AC-P-2S-PP-01

Check for alarms and faults on the LCD interface

Rectify problem if alarms are found

Pump down the unit as per the Pumpdown Procedure

Was there a compressor burnout?

Dispose of refrigerant according to local codes if there was a compressor burnout

Disconnect piping and remove crankcase heater, leaving it electrically connected

Replace the compressor and the liquid line filter-dryer

Ensure nitrogen is flowing through the system at the lowest flow rate during brazing procedures

Vacuum the unit as per the procedure

Charge the unit with new refrigerant and operate continuously for 2 hours

Take a picture of the control board and connectors for reference

Remove all green terminal strips on the left side, right side, and bottom of the control board

Remove the red six pin display board connector from the left side of the control board

Remove all connectors from the top of the control board

Remove the control board from its four corner standoffs

Remove any remaining standoffs if present

Place the unit in SERVICE mode via the PC App or LCD interface

Ensure electrical power is not turned off at the breaker panel

Connect the refrigerant recovery unit to the heat pump’s internal service ports via a refrigeration charging manifold and to a recovery tank

Plan to dispose of refrigerant if there was a compressor burnout

Ensure refrigerant to water heat exchangers have full flow or are completely drained of fluid

Start circulation pumps via building control system if necessary

Ensure all hose connections are properly purged of air

Start the refrigerant recovery as per the instructions in the recovery unit manual

Remove the display board cable connector from the control board

Slice each of the display board standoff heads off using a sharp utility knife

Pull the display board from the unit

Remove the display board cable connector from the back of the display board

Place a new display board standoff into each of the four holes in the cabinet

Remove the new display board from the static bag it was shipped in

Connect one end of the display board cable to the back of the display board

Place the display board in position and align the four standoffs into the four holes of the board