The system settings of SCU-401 must be the same as SCU-201 when replacing SCU-201 with
SCU-401.
The original system settings of SCU-201 are listed below.
List of the settings (SCU-201)
DIP
SW #
Item in the Sys
settings
System type
OFF
ON
Standard Recirc
Tank
recirc
2
Pump error
check
Not
Available Available Available
System will not check for
pump operation
System will check for flow
when system controller
pump terminals are
energized. If no flow is
present, it will display 63
error code*
3
Pump rotation
Not
Available Available Available
System will rotate pump
1 and 2 operation
Pump 1 and 2 will
operate simultaneously*
4
125
℉
recovery
during high-
temperature
setting
Available Available Available
If the Power ON/OFF
Button is turned OFF and
ON, the unit will accept
125
℉
return water (if
the unit is set at that
temperature or higher)
The unit will allow
the standard return
temperature*
*Factory Default Settings
1 2 3 4 5 6 7 8
ON
OFF
─24─