Maritime Geothermal Water-to-Water Heat Pump W-90-H-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 a 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?

Compressor Contactor Inspection

Is replacement or tightening necessary?

Take a picture of the control board and connectors for reference

Remove all green terminal strips from 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

Remove the new control board from the static bag

Check for presence of strainers

Inspect strainers for debris or blockages

Document any issues found during inspection

Sign off on inspection completion