System Set-Up
Installation Manual
45
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 unit does not turn on / off according to the setting temperature at the remote controller.
It turns on / off according to the thermostat signal.
• Following features are NOT permitted in emergency operation :
-
Operating mode (heating / weather-dependent) selection
- Time
scheduling
- SET
TEMP
button
• Duplicated trouble : Option trouble with minor or major trouble
If option trouble is occurred with minor (or major) trouble at the same time, the system puts
higher priority to minor (or major) trouble and operates as if minor (or major) 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 whether the
sanitary water sensor and related wiring are connected well or not.
• Emergency operation is not automatically restarted after main electricity power is reset.
In normal condition, the unit 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 unit.
Therefore, user must restart the unit after power reset when emergency operation has been
running.
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