Operation
mode
SV4a
Heating
ON
only
ON
ON
ON
ON
ON
ON
ON
ON
OFF
Heating
ON
main
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
*All solenoid valves are turned off while the unit is stopped.
Solenoid valve
SV4b
SV4c
SV4d
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
- 135 -
SV7a
SV7b
SV7c
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
[ VII Control ]