| 摘要 |
<p>PROBLEM TO BE SOLVED: To simply update a control program of a water heater.SOLUTION: A program update system 1 includes: a plurality of devices each including a storage section for storing a control program of a water heater, and a processor; a communication path for connecting one of the devices to the other device. A processor in the other device includes means of transmitting at least a part of a control program in the storage section of the same device when receiving a predetermined operation. A processor in the one device includes means of rewriting a part of a control program in the storage section of the same device with at least a part of the received control program.</p> |
