Rinnai FUA-E, Service Manual

Page: 47 / 67

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
～
30
Ω
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 DC1
μ
A
At ignition
⑥
HOT WATER
THERMISTOR
A
4
W-W
15
℃…
11.4
～
14.0k
Ω
30
℃…
6.4
～
7.8k
Ω
45 ℃… 3.6 ～ 4.5k Ω
60
℃…
2.2
～
2.7k
Ω
105
℃…
0.6
～
0.8k
Ω
Measure Thermis-
tor side (small wire)
⑦
AIR INTAKE
THERMISTOR
A
3
Y/Bk-Y 15
℃…
20.1
～
17.9k
Ω
30
℃…
10.2
～
8.9k
Ω
45 ℃… 5.5 ～ 4.7k Ω
60
℃…
3.1
～
2.6k
Ω
105
℃…
0.7
～
0.5k
Ω
Measure Thermis-
tor side (small wire)
⑧
THERMAL
FUSE C
3
A
5
R-switch Less than 1
Ω
⑨
IGNITOR G
1
Gy-Gy
AC200
～
240V
⑩
MAIN SOLE-
NOID VALVE F
1
P-Bk
DC200
～
240V
6.0
～
7.8K
Ω
⑪
SOLENOID
VALVE 1 F
2
B-Bk DC200
～
240V
7.8 ～ 10.8K Ω
⑫
SOLENOID
VALVE 2 F
3
Y-Bk DC200
～
240V
7.8 ～ 10.8K Ω
⑬
MODULATING
VALVE C
1
P-P
DC2 ～ 15V
67 ～ 83 Ω
Connector Wire Color Normal Value
H
W-W AC200
～
240V 11
～
20
Ω
D Or-Or
AC49 ～ 55V 1.3 ～ 1.7 Ω
D B-Br AC12
～
14V 0.7
～
1.3
Ω
D Br-Y
AC195 ～ 216V 175 ～ 215 Ω