202Fta, 265Fta Troubleshooting - Rinnai RHFE-551FA Service Manual

Troubleshooting
Part
Control Panel
OHS.
TF
O.H. TH
White - White
(Filter sign)
White - White
(TH operates)
Room
Thermistor
FR
Combustion Fan
(In case of short
vent.)
Combustion Fan
(In case of long vent.)
Ignitor
SV
Modulating Valve
Convection Fan
Pressure Sensor
Transformer
Gray - Gray
White - White
Red - Red
Brown - Brown
Black - Blue
Black - Yellow
20
Wire
Red - Blue
Blue - Blue
White - White
Blue - White (OHS1)
Blue - White (OHS2)
White - White (TF)
White - White
Temperature
High
Low
High
Low
Yellow - Yellow
Temperature
Yellow - Yellow
White - Black
Initial
Ignition
revolution
Re-attempt
High
Normal
revolution
Low
White - Black
Initial
Ignition
revolution
Re-attempt
High
Normal
revolution
Low
Red - Blue
Black-White
Black-Yellow
Red-White
Red - Black
Red - White
60Hz-120V
AC108-132V, 5-20Ω
AC95-120V, 5-20Ω
AC20-40V, 0.5-2.0Ω
AC10-30V, 1-5Ω
AC10-30V, 1.0-3.0Ω
AC200-240V, 200-450Ω
Rinnai Direct Vent Service Manual
202FTA
DC0-5V (Pulsed voltage); Resistance is infinity, but the current flows
when the switch is pushed.
Below DC 1V, Below 2Ω
0.87-482kΩ; (<0.87kΩ:Short, >482kΩ:Open)
32°F (0°C):214kΩ, 68°F (20°C):78kΩ, 122°F (50°C):21kΩ
176°F (80°C):7.3kΩ, 212°F (100°C):3.6kΩ, 135°F (275°C):1.5kΩ
Flashes below 4.5kΩ
Flashes below 4.5kΩ
Operates below 3.4kΩ
Operates below 3.4kΩ
1.82-707kΩ; (<1.82kΩ:Short, >707kΩ:Open)
32°F (0°C):113kΩ, 68°F (20°C):39kΩ,
86°F (30°C):24kΩ, 104°F (40°C):15kΩ
Below 0.1μA （During Stop)
Below ignition revolution +2Hz
LP: 75Hz, NG: 80Hz
LP: 75Hz, NG: 80Hz
LP: 110Hz, NG: 110Hz
LP: 83Hz, NG: 83Hz
-
-
-
-
-
80-100V, 1.5-2.5kΩ
DC2-15V（Low-High), 60-90Ω
50-110V, 90-180Ω
RHFE-202FTA
RHFE-265FTA
265FTA
Below ignition revolution +2Hz
LP: 80Hz, NG: 85Hz
LP: 80Hz, NG: 85Hz
LP: 128Hz, NG: 118Hz
LP: 82Hz, NG: 81Hz
Below ignition revolution +2Hz
LP: 80Hz, NG: 85Hz
LP: 80Hz, NG: 85Hz
LP: 128Hz, NG: 128Hz
LP: 82Hz, NG: 89Hz
90-120V
DC3 - 7V