| 摘要 |
<p>PURPOSE:To allow display apparatuses to display a plurality of operating conditions of the hot water supplier by lighting respective display apparatuses in accordance with a change in a voltage or a current supplied to a remote controller from the hot water supplier through a transmission line. CONSTITUTION:When a hot water supplier 1 starts its operation and combustion is started, a control circuit 7 operates and a second output terminal B outputs a low-level signal in place of a high-level signal. For this reason, the inter-terminal voltage of a third resistor 16 becomes high and a high voltage is supplied to a remote controller 6. A regulate diode 25 becomes conductive, and a combustion display lamp 26 is lit. Upon this occasion, an operation lamp 28 is continuously lit. A current in accordance with a set value of a variable resistor 23 flows and a voltage drops in accordance with the current appears at a current detecting resistor 18. The control circuit 7 operates in accordance with this voltage and the temperature control of hot water supplied from the hot water supplier 1 is carried out. When an operation switch S is turned off, a current does not flow from the remote controller 6 to a current detection resistor 18, the control circuit 7 operates and the operation of the hot water supplier 1 is stopped. Further, in a case where a fault or the like occurs in the hot water supplier 1, the control circuit 7 acts and the combustion display lamp 26 flashes.</p> |
