Maritime Geothermal Compressor WH-120-H-B-8S-ZC-02

Is there a performance degradation not explained by a refrigeration circuit problem or low loop flow rate?

Loop Disconnection and Flushing

Flush heat exchanger with a lime removing solution.

Is the system a warm water open loop system with reduced performance?

Pump down the unit as per the Pumpdown Procedure

Was there a compressor burn out (motor failure)?

Remove crankcase heater, leaving electrically connected

Replace the liquid line filter-dryer

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

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

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

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 four corner standoffs

Remove any remaining standoffs from the old control board

Carefully remove the new control board from the static bag

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