Rinnai RHFE-551FA Service Manual page 44

Troubleshooting
(SV1, SV2, SV3) Gas valve solenoids
SV1 - Purple - Yellow
SV2 - Purple - Peach
SV3 - Purple - Yellow
(BL) Combustion Fan Motor:
NOTE: If your meter does not have a hertz scale, please refer to voltage and resistance readings listed below. If
you have a hertz scale, check the following items first. Hertz reading across black - white wires, pins 41
White - yellow = low speed
White - red = high speed
(FM) Convection fan motor:
White - blue = low speed
White - red = high speed
(TR1) Transformer
Black - White
Red - Black
(PS) Pressure switch:
White - Ground
Check from both white wires to
ground to ensure circuit is
complete.
44
90 VDC Lo fire
90 VDC Hi fire
90 VDC redundant coil
95 - 105 VAC
110 - 125 primary side
98 - 105 secondary side
9 - 12 VDC
Rinnai Direct Vent Service Manual
1,200 - 1,800 ohms
1,200 - 1,800 ohms
1,200 - 1,800 ohms
200 - 300 ohms
120 - 180 ohms
230 - 290 ohms
100 - 125 ohms
16 - 21 ohms
24 - 29 ohms
In order to eliminate this switch as a cause of
failure, shut the power off to the unit and
jump out this switch. Restart unit. If it
functions, replace air pressure switch.
RHFE-551FA