Installer reference guide / Mono tank integrated type 124
8.2. Indoor unit
Indoor unit - Dip switches
VOLTAGE
AREA
LOW
VOLTAGE
AREA
1 32 4
ON
YKO
KEY ON(default) OFF Remark
DIP 1 Normal Operation Emergency Heating Operation
When both DIP 1 and 2 are OFF at the same time,
EHS operates only emergency heating mode
DIP 2 Normal Operation Emergency DHW Operation
DIP 3 Normal Operation Concrete Curing Function -
DIP 4 Normal Operation
code modification
If you set Dip s/w #4 off in the tank integrated hydro
unit, then the Error E101 still there but after outdoor unit
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