An indicator for outputting information relating to a heat-pump system including a plurality of usage-side units which form a communication network, comprising: a mode management section configured to accept selection from a plurality of operation modes of the indicator including a first mode; and an indicator output section configured to output information, characterized by : a unit-side communication section configured to receive or acquire first and second unit signals from a predetermined usage-side unit which is one of the usage-side units, the first unit signal being used for information originated by the predetermined usage-side unit, the second unit signal being used for information not originated by the predetermined usage-side unit; and a unit signal processing section configured to, when information has been received or acquired by means of a second unit signal during the indicator is not operating in the first mode, restrain the information from being outputted by the indicator output section, wherein the indicator output section is configured to, when alarm information has been received or acquired by means of a second unit signal during the indicator is operating in the first mode, output the alarm information, and, when alarm information has been received or acquired by means of a first unit signal, output the alarm information. a mode management section configured to accept selection from a plurality of operation modes of the indicator including a first mode; and an indicator output section configured to output information, characterized by : a unit-side communication section configured to receive or acquire first and second unit signals from a predetermined usage-side unit which is one of the usage-side units, the first unit signal being used for information originated by the predetermined usage-side unit, the second unit signal being used for information not originated by the predetermined usage-side unit; and a unit signal processing section configured to, when information has been received or acquired by means of a second unit signal during the indicator is not operating in the first mode, restrain the information from being outputted by the indicator output section, wherein the indicator output section is configured to, when alarm information has been received or acquired by means of a second unit signal during the indicator is operating in the first mode, output the alarm information, and, when alarm information has been received or acquired by means of a first unit signal, output the alarm information. a unit-side communication section configured to receive or acquire first and second unit signals from a predetermined usage-side unit which is one of the usage-side units, the first unit signal being used for information originated by the predetermined usage-side unit, the second unit signal being used for information not originated by the predetermined usage-side unit; and a unit signal processing section configured to, when information has been received or acquired by means of a second unit signal during the indicator is not operating in the first mode, restrain the information from being outputted by the indicator output section, wherein the indicator output section is configured to, when alarm information has been received or acquired by means of a second unit signal during the indicator is operating in the first mode, output the alarm information, and, when alarm information has been received or acquired by means of a first unit signal, output the alarm information. when alarm information has been received or acquired by means of a second unit signal during the indicator is operating in the first mode, output the alarm information, and, when alarm information has been received or acquired by means of a first unit signal, output the alarm information. <EOS>