Troubleshooting (1001Fa) - Rinnai RHFE-551FA Service Manual

Troubleshooting
WARNING
There are a number of live tests that are required when fault finding this product. Extreme care should be used at
all times to avoid contact with energized components inside the furnace.
You MUST be a qualified service person before proceeding with these test instructions.
Before checking resistance readings, turn off power source to unit and then isolate each item to be checked from
the circuit by unplugging it.
When setting gas pressures on one of these units, please check the complete model number you are trouble-
shooting. Gas pressures and dip switches can vary among models. Always check the rating plate for complete
information and follow directions.
(TR2) Transformer:
Read voltage across:
Red - Red
Yellow - Yellow
White - White
(SP) Sparker:
+ Red --------------------
- White --------------------
(SV1, SV2, SV3) Gas solenoids:
SV1 - White ~ Blue (redundant)
SV2 - White ~ Blue (lo fire)
SV3 - Black ~ White (hi fire)
(BL) Combustion fan motor:
White - Orange = lo speed
White - Black = hi speed
Capacitor
White - Red = lo speed
White - black = hi speed
56
98 - 105 VAC
208 - 224 VAC
10 - 15 VAC
85 - 95 VDC N/A
85 - 90 VDC
85 - 90 VDC
85 - 90 VDC
95 - 105 VAC
95 - 105 VAC
220 VAC (3.5 µF)
95 - 105 VAC
95 - 105 VAC
Rinnai Direct Vent Service Manual
Read resistance
39 - 44 ohms
1,325 - 1,390 ohms
2.0 - 2.5 ohms
Pin # 28 - 29
1,400 - 1,800 ohms
1,200 - 1,600 ohms
1,200 - 1,600 ohms
200 - 300 ohms
120 - 180 ohms
100 - 140 ohms
42 - 62 ohms
RHFE-1001FA
Pin #'s
N/A
14 - 17
15 - 16
29 - 30
29 - 30
29 - 31
18 - 20
18 - 21
18 - 26
18 - 25