Service manual

3. Electrical Parts
3-32
SDG100S-6A6(QOSⅡ)
(1) List of functions
Pin
No.
Line
color
Connection Function
1 R/W 10A fuse Power supply
2 B/W Water temperature switch Detection of water temperature
3 W/Y Safety relay C terminal Detection of start signal
4 G/R Glow relay
Power supply for excitation of glow relay
When start signal is inputted to No.3 terminal, it
preheats irrespective of water temperature.
5 B Grounding
6 L/Y Controller No.5 terminal
While is electrically conducted, pre-heating lamp
glows.
When electricity is given to No.1 terminal, the
contact between No.5 and No.6 terminals becomes
ON and the pre-heat lamp glows.
Further, while pre-heat lamp glows, and when start
signal is inputted to No.3 terminal, the contact
between No.5 and No.6 terminals becomes OFF and
lamp goes off.
SG06046E