Maritime Geothermal Compressor WH-140-H-B-2S-PP-01

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

Was there a compressor burn out?

Dispose of refrigerant according to local codes

Disconnect piping and remove crankcase heater

Replace the compressor and liquid line filter-dryer

Ensure nitrogen is flowing during brazing procedures

If there was a compressor burnout, charge the unit with new refrigerant and operate for 2 hours

Pump down the unit and replace the filter-dryer

Place the unit in SERVICE mode via the PC App or LCD interface

Ensure electrical power is not turned off at the breaker panel

Connect the refrigerant recovery unit to the heat pump’s internal service ports via a refrigeration charging manifold and to a recovery tank

Plan to dispose of refrigerant if there was a compressor burnout

Ensure refrigerant to water heat exchangers have full flow or are completely drained of fluid

Start circulation pumps via building control system if necessary

Ensure all hose connections are properly purged of air

Start the refrigerant recovery as per the instructions in the recovery unit manual

Check for alarms and faults on the LCD interface

Rectify problem if alarms are found

Ensure nitrogen is flowing through the system at the lowest flow rate during brazing procedures

Replace the liquid line filter-dryer if the refrigeration system has been exposed to the atmosphere

Place a wet rag around any valves being installed to protect non-metallic seats or seals

Aim the torch flame away from the valve body

Solder only one joint at a time and cool joints down in between

Enter the nitrogen pressure at 10 psig

Enter the nitrogen pressure at 25 psig