Maritime Geothermal Compressor W-100-H-P-5S-ZZ-01

Take a picture of the control board and connectors for reference

Remove all green terminal strips from 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 standoffs

Remove any remaining standoffs from the old control board

Remove the new control board from the static bag

Place cut off standoffs from the old board into the new board

Remove the display board cable connector from the control board

Slice off display board standoff heads

Pull the display board from the unit

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

Place new display board standoffs into cabinet holes

Remove the new display board from the static bag

Connect display board cable to the back of the display board

Place and align the display board with standoffs

Pump down the unit as per the Pumpdown Procedure

Was there a compressor burn out?

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

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

If there was a compressor burnout, charge the unit with new refrigerant and operate for 2 hours

Pump down the unit and replace the filter-dryer after 2 hours of operation

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

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

Are there any alarms or faults displayed on the LCD interface?

Describe any alarms or faults found

Describe the rectification actions taken

Is the LCD interface clear of alarms and faults after rectification?