Maintenance and Troubleshooting

As with any mechanical equipment, the unit will eventually not work properly or stop altogether. Here are some things you can check before you call your service contractor.

Check the air filter.

If the energy produced by a heat pump is not removed and distributed to your home quickly enough, the pressure in the refrigerant system will shut the unit off automatically before it gets damaged. If the air filter is clogged enough to prevent adequate air flow through the heat pump, it lso will shut down. Cleaning the filter will restore the air flow. Never operate the unit without an air filter, as the manufacturer may void the warranty. It also may be possible that some of the supply air or return air registers in the home have been blocked off (for example, painters may have blocked the registers in some rooms while painting).

Make sure the thermostat is set properly.

If the thermostat setting is changed accidentally, the unit may not receive a signal to heat or cool your home. Some thermostats have a separate switch that controls whether the system heats or airconditions. Others may also have warning lights to indicate a problem with the system.

Check whether any disconnect switches or circuit breakers for the heat pump are on.

Heat pumps with an electric auxiliary heater usually have separate circuit breakers for the heat pump compressor and the auxiliary heater. If the circuit breaker trips when you switch it on again, contact your contractor or service company immediately.

Check the power supply to the circulating pump.

The pump on most GXS with a closed loop takes its power from the heat pump itself, although it can sometimes have a separate power supply. The well pump for an openloop (ground-water) system will probably have its own power supply. Make sure it is on. The controls for the well pump may require repair. If so, contact the contractor that installed the well pump and pressure system.

Check your owner’s manual.

The manufacturer of your heat pump may have recommendations specific to the equipment installed in your home that may correct a problem with your system.

When the unit is air-conditioning your home, condensation forms on the air coil inside the heat pump. A condensate drain (typically clear plastic tubing) is normally installed to drain the water from the heat pump to a floor drain, sump pit or drain with trap. If an appropriate drain is not located near the heat pump, a pump may have to be installed to pump the condensate to a drain. In time, dust
and dirt may plug the condensate drain, causing a pan under the air coil to fill and spill over onto the floor. Cleaning the drain and the hose ill normally solve this problem.

Servicing Requiring a Contractor

Occasionally, your GXS may require servicing. Specialized training and iagnostic tools may be needed to ensure the proper operation of your system. Call your service contractor if:

  • the circuit breaker for the heat pump or circulating pump trips repeatedly after resetting;
  • the heat pump does not heat or air-condition adequately after ou have checked that the air filter is clean and the thermostat settings are correct;
  • you hear a “gurgling” noise from the piping connecting your heat
    pump to the earth loop; or • you hear grinding noises from the pump circulating fluid through your heat pump.


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