Maritime Geothermal Water-to-Water Heat Pump WH-100-AC-B-2S

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 restored?

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

Install cut off standoffs from the old board onto the new board

Align and snap the new control board into the four corner standoffs

Check the presence of strainers

Is cleaning necessary for any strainer?

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

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

Rectify the problem if alarms or faults are found.