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11/6/2018
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
61
Combustion Fan
- Ensure combustion fan spins freely.
- Inspect fan motor wiring harness for broken, damaged and loose connectors
- Measure resistance value of fan motor, see electrical diagnostics for values.
- Inspect vent system intake and exhaust for blockage or ice build-up in termination
- Replace fan motor
63
Pump error (internal pump)
- Ensure Cross Over Valve (COV) plug was installed for COV installation.
- Check both water filters on unit for blockage, (1) for water inlet & (1) for circulation
mode.
- Ensure internal pump check valve is functioning properly
- Check circulation pump wiring harness for loose, damage or broken connections.
- Ensure all manual valves installed in circulation line are open
- Ensure water flow servo valve did not fail in the closed position.
- Ensure parameters are properly set for the type circulation mode being used,
(Cross Over or dedicated mode). See owner’s manual for details.
65
Water Flow Control
- Measure resistance values of the water flow control (See Electrical Diagnostics)
- The water flow control valve has failed to close during the bath fill function.
immediately turn off the water and discontinue the bath fill function.
70
P.C. Board
–
Check all wiring harnesses connections on the P.C. board and at each component
in the water heater for loose, damaged or broken connections.
–
Replace the P.C. board.
71
Gas Solenoid Valve Fault
-
Ensure the ONLY dip switch on PC board is in the “OFF” position.
- Ensure gas control valve wiring is not damaged, loose or broken.
- Ensure ceramic heater circuit is not grounded or shorted out.
- Replace PC Board.
72
Flame Rod
- Inspect flame rod wiring for loose, damage or broken connectors
- Verify heat exchanger is not leaking
- Replace flame rod
- Replace PC Board.
Fault Codes
