Service
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169
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‘19 • HM-T-340
Operation control function by the indoor unit control
Operation mode
General
The modes mentioned below can be chosen from the control panel.
Function
● Hot water is supplied for heating.
● Hot water operation will be made when the tank water temperature lowers.
● When the outdoor unit can not cover the heat load, electric heater use is allowed and water in the tank is
supplied for heating to fulfill the required heat load.
● Cold water is supplied for cooling.
● Hot water operation will be made when the tank water temperature lowers;
● Outdoor unit is not allowed to operate.
● Only electric heater is exclusively used for Heating and Hot water operation.
Mode
(2) Manual
(3) Heating
(5) Add. Heat only
Note 1 : The measured value of outdoor air temperature (BT1) which is used for control, is averaged in accordance with the prescribed formula.
Note 2 : Heating/Cooling demand is calculated as numeric DM (Degree Minutes) from the supply water temperature (BT12) and its target
temperature in accordance with the prescribed formula.
Note 3 : Electric heater can be replaced with external heat source of the docking feature. See Menu 5.1.12 and 5.3.6 for setting.
Note 4 : Two sets of climate system can be controlled with different heating curve. See Menu 1.9.1 for setting.
● The mode is automatically switched over between (3) Heating mode and (4) Cooling mode.
Automatic switching rule is mentioned below.
● In this operating mode, you can select what functions are permitted.
● You can’t deselect “compressor” in manual mode.
(1) Auto
(4) Cooling
(Super Cooling)
Operation control function by the indoor unit control
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