Using Thermostat
Owner’s Manual 27
ENGLISH
• Following features are permitted in emergency operation. :
- Operation On/Off
- VIEW TEMP button*
- Temperature adjust button*
- Sanitary water heating Enable / Disable
* : Temperature measured by failed sensor is displayed as ‘- -’.
* : Adjusted temperature is only used to control electric heater on / off condition.
The product does not turn on / off according to the setting temperature at the control panel. It turns
on / off according to the thermostat signal.
• Following features are NOT permitted in emergency operation. :
- Operating mode (cooling/ heating/ weather-dependent) selection
- Time scheduling
- SET TEMP button
• Duplicated trouble : Option trouble with slight or heavy trouble
- If option trouble is occurred with slight (or heavy) trouble at the same time, the system puts higher
priority to slight (or heavy) trouble and operates as if slight (or heavy) trouble is occurred.
- Therefore, sometimes sanitary water heating can be impossible in emergency operation mode.
When sanitary water is not warming up while emergency operation, please check if sanitary water
sensor and related wiring are all Ok.
• Emergency operation is not automatically restarted after main electricity power is reset.
- In normal condition, the product operating information is restored and automatically restarted
after main electricity power is reset.
- But in emergency operation, automatic re-start is prohibited to protect the product.
- Therefore, user must restart the product after power reset when emergency operation has been
running.
