Maritime Geothermal Water-to-Water Heat Pump WP-65-H

Is the LCD Interface or PC App accessible?

Is the heat pump problem suspected?

Are there any alarms or faults reported through the BACnet system?

Check for alarms and faults on the LCD Interface or PC App

Rectify problem if alarms or faults are found

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?

Compressor and Filter Replacement

Replace the liquid line filter-dryer

Ensure nitrogen is flowing through the system during brazing

Vacuum the unit as per above procedure

Take a picture of the control board and connectors for reference

Remove all green terminal strips

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

Were there any standoffs left after removing the control board?

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.

If a purge cart is not available, use a 5 gallon plastic bucket, a circulator and some plastic piping to create a makeshift pump system. Connect the inlet and outlet to the heat exchanger ports.

Place 2 gallons of RYDLYME or similar in the purge cart (or bucket).