| 摘要 |
PROBLEM TO BE SOLVED: To permit a multitude of indications and minimize a manufacturing cost by a method wherein a test mode is shifted to a second test mode when the pushing time of a mode switch has elapsed a first predetermined time, then, the test mode is shifted to a third test mode when the pushing time of the mode switch has elapsed a second predetermined time. SOLUTION: When a mode switch is pushed continuously for more than 5 sec and less than 15 sec (S4) from the indication of a second test mode or mode in regard to a burner (S3), an indicating device is switched from the second test mode to a third test mode or a service mode indication and a four- way valve as well as a two-way valve are put ON. When the mode is entered into the service mode once, the service mode is continued unless otherwise the power supply chord of an air conditioner is pulled out. A multitude of indications can be effected with the minimum indicating device by the change of pushing time of two sets of test mode switch and changeover switch in such a manner while a manufacturing cost can be minimized. |
