Maritime Geothermal Water-to-Water Heat Pump W-25-HAC

Is the LCD Interface or PC App accessible?

Were any alarms or faults found?

Describe the alarms or faults found

Rectify the problem if alarms were found

Coaxial Heat Exchanger Flushing Procedure - Open Loop

Isolate the heat exchanger by closing the valves in the IN and OUT ports to the heat exchanger.

Blow out the heat exchanger into a clean 5 gallon bucket using compressed air.

Use a 5 gallon plastic bucket, a circulator, and some plastic piping to create a makeshift pump system if a purge cart is not available.

Connect the inlet and outlet to the heat exchanger ports.

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

Inspect for pitted points on the contactor

Inspect for burned points on the contactor

Is replacement of contactor necessary?

Pump down the unit as per the Pumpdown Procedure

Was there a compressor burn out (motor failure)?

Compressor and Filter Replacement

Replace the liquid line filter-dryer

Ensure nitrogen is flowing through the system during brazing procedures