Maritime Geothermal Water-to-Water Heat Pump W-90-W-P-2S

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

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

Flush heat exchanger with a lime removing solution

Is the system performance reduced for warm water open loop systems?

Are there any alarms or faults reported on the LCD Interface or PC App?

Rectify the problem if alarms or faults are found

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 the new control board from the static bag

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

Compressor Contactor Inspection

Is replacement of contactor necessary?

Is tightening of wires necessary?