CONTROL CIRCUIT OF HOT WATER SUPPLY MACHINE

摘要

PURPOSE:To improve efficiency at the time of repairing at a selling agent or a selling company, through which a burdon to be imposed on a user is lightened also, by classifying and displaying contents by a digital indicator through a symbol and a figure when an abnormal state of a hot water supply machine and a trouble of parts are generated. CONSTITUTION:When the signal of detection of flame is not applied to a microcomputer 23 even after the lapse of a fixed period of time irrespective of a matter that a burner 13 has started operation, ''1'' (error 1) is displayed by a digital indicator 33 in preference to display of an operating state and at the same time action of the burner 13 is suspended also. This is the display showing shortage of fuel oil. Then when a detecting electrode 17 of an empty tank and an earthquake detector 19 are operated respectively ''2'' or ''3'' is displayed respectively on the digital indicator 33. The former and the latter of those become displays urging water supply to a user and resetting of the earthquake detector respectively. The burner 13 is suspended at this time too.