Specifications

47
Diagnostic Points
TRANSFORMER VOLTAGES AND RESISTANCES
Flow
Chart
No.
Component
Measurement point
Determination (normal figure)
Upper : Voltage
Lower : Resistance, Current
Remark
CN Wire Color
I B-Br
AC200～AC240V
AC power
①
GEARED
MORTOR
A
1
R-B
DC11～13V
10～30Ω
Drive power
R-Bk
DC11～13V
Control power
Y-Bk Below DC1V(limiter ON)
Below DC4～6V(limiter OFF)
Full open limiter
Br-Bk Below DC1V(limiter ON)
Below DC4～6V(limiter OFF)
Full close limiter
②
REMOTE CON
TROLS
E
1
Bk-W
DC11～13V
③
WATER FLOW
SENSOR
A
2
R-Bk
DC11～13V
ON2.4L/min
(35Hz) over 2100
pulse/min.
OFF1.7L/min
(24Hz) below 1440
pulse/min
Y-Bk
DC4～7V(pulse 17～400Hz)
④
FAN MOTOR B
1
R-Bk
DC6～40V (fan on)
More than 1200
pulse/min
Y-Bk
DC11～13V (standby or on)
W-Bk
DC2～10V(pulse 20～400Hz)
fan on
⑤
FLAME ROD C
2
Y-earth
More than DC1μA
At ignition
⑥
HOT WATER
THERMISTOR
A
4
W-W
15 ℃…11.4～14.0kΩ
30 ℃… 6.4～ 7.8kΩ
45 ℃… 3.6～ 4.5kΩ
60 ℃… 2.2～ 2.7kΩ
105℃… 0.6～ 0.8kΩ
Measure Thermis-
tor side (small wire)
⑦
AIR INTAKE
THERMISTOR
A
3
Y/Bk-Y
15 ℃…20.1～17.9kΩ
30 ℃…10.2～ 8.9kΩ
45 ℃… 5.5～ 4.7kΩ
60 ℃… 3.1～ 2.6kΩ
105℃… 0.7～ 0.5kΩ
Measure Thermis-
tor side (small wire)
⑧
THERMAL
FUSE
C
3
A
5
R-switch
Less than 1Ω
⑨
IGNITOR G
1
Gy-Gy
AC200～240V
⑩
MAIN SOLE-
NOID VALVE
F
1
P-Bk
DC200～240V
6.0～7.8KΩ
⑪
SOLENOID
VALVE 1
F
2
B-Bk
DC200～240V
7.8～10.8KΩ
⑫
SOLENOID
VALVE 2
F
3
Y-Bk
DC200～240V
7.8～10.8KΩ
⑬
MODULATING
VALVE
C
1
P-P
DC2～15V
67～83Ω
Connector Wire Color Normal Value
H
W-W
AC200～240V 11～20Ω
D Or-Or
AC49～55V 1.3～1.7Ω
D B-Br
AC12～14V 0.7～1.3Ω
D Br-Y
AC195～216V 175～215Ω