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5
System Set Up
5.4 Indoor unit only operation (during installation work)
In the case when DHW or heating operation is required prior to connection of the
outdoor unit; i.e. during installation work, an electric heater in indoor unit (*1) can be
used.
*1 Model with electric heater only
1. To start operation
● Check if the indoor unit power supply is OFF, and turn DIP switch 4-4 and 4-5 ON.
● Turn ON the indoor unit power supply.
5.5 Smart grid ready
In DHW, heating or cooling operation, the commands in the table below can be used.
IN11
IN12
Meaning
OFF (open)
OFF (open)
Normal operation
ON (short)
OFF (open)
Switch-on recommendation
OFF (open)
ON (short)
Switch-off command
ON (short)
ON (short)
Switch-on command
5.6 Forced cooling mode input (IN13) (only for ER series)
● When IN13 is active, the mode (heating/cooling) is fixed to cooling.
● SW7-2 changes the logic of IN13.
Name
Terminal block
Active at short
IN13
TBI.4 3-4
(Default setting)
Notes:
Use non-voltage contact signals for the switch of IN13.
The mode (heating/cooling) does not switch under the condition such as
● within 60 minutes since the mode switched last time,
● during DHW mode or legionella prevention mode,
● during outdoor unit protection control,
● during emergency operation, floor dry up operation, or abnormality.
Check the mode with the main remote controller or the cooling signal output (OUT8 ON: cooling, OFF: heating).
DIP SW7-2
OFF
ON
Active at open
2. To end operation*2
● Turn OFF the indoor unit power supply.
● Turn DIP switch 4-4 and 4-5 OFF.
*2 When the indoor unit only operation is ended, ensure to check over the settings
after outdoor unit is connected.
Note:
Prolonged running of this operation may affect the life of the electric heater.
TBI.3
Active
Inactive
60 min 60 min
Heating/Cooling
Cooling
Heating
4 3 2 1
IN11
IN12
Cooling
en
24
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