Rinnai Energysaver RHFE-1004FTA, Service Manual

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16 Rinnai Direct Vent Service Manual
RHFE-263FA
RHFE-263FAII
RHFE-263RFA
Troubleshooting
(AC IN)
Black-White 120 VAC Pin # 1-2
Black-Ground 120 VAC Pin #2-Ground
White-Ground 0 VAC Pin #1-Ground
(TR) Transformer: (Connector CN2 AC Out)
Read voltage across: Voltage Potential Read resistance Pin Numbers
Gray - Gray 98-125 VAC 4--16 Ω 1-7
Black - Yellow 200-220 VAC 250--400 Ω 5-8
Black - Blue 12-20 VAC 1--3 Ω 8-9
White - White 98-125 VAC 4--14 Ω 2-3
Red - Red 35 VAC 1--3 Ω 4-10
(SP) Sparker: (Connector CN4)
Read voltage across: Voltage Potential Read resistance Pin Numbers
Red-Blue 85-100 VAC 100K-120K Ω 3-6
The spark must be sensed as being at the correct location and intensity before it will allow the gas valve to open. Check
across Pin # 1-2 at Connector F and you should read 4-6 VDC potential. When sparking, if the spark is in the right location and
intensity the voltage potential will drop to almost 0 (zero) and then return to the 4-6 VDC potential.
(SV1, SV2, POV) Main Solenoid Valves: (Connector CN4)
Read voltage across: Voltage Potential Read resistance Pin Numbers
SV1 - Yellow ~ Black (hold) 85-90 VDC 1400-2000 Ω 1-4
SV2 - Yellow ~ Black (assist) 85-90 VDC 1400-2000 Ω 1-4
POV - Gray ~ Gray 6-16 VDC 80-90 Ω 2-6
*Resistance across each coils terminals should be 1400-2000 Ω when isolated.
(BL) Combustion Fan Motor: (Connector CN8) DC Motor 37VDC 8 Watts
Read voltage across: Voltage Potential Read resistance Pin Numbers
Black-White 7-12 VDC 8-10 K Ω 7-8
Yellow-White 4-5 VDC 4-6 K Ω 4-8
Red-White 10-30 VDC N/A 3-8
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.
WARNING