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11/6/2018
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
14
Heat Exchanger Overheat
- Measure resistance of Overheat Switch. (See Electrical Diagnostics)
- Check heat exchanger surface for hot spots which indicate blockage due to scale.
Refer to instructions in manual for flushing heat exchanger. Hard water must be
treated to prevent scale build up or damage to the heat exchanger.
- Ensure unit is not set in the forced High fire setting.
- Ensure the only dip switch on the P.C. board is in the OFF position.
15
Venturi Control
–
Check gas solenoid wire harness for loose or damaged terminals .
–
Measure resistance of gas valve solenoids.
–
Ensure gas valve is getting voltage when unit is trying to fire up.
–
Ensure fan motor is getting voltage when unit is trying to fire up.
–
Check fan motor for proper operation. .
–
Replace gas valve.
–
Replace fan motor
16
High Outgoing Water Temperature
(Safety shutdown
– outlet water
temperature exceeded 203
°F (95°C)
- Check for restrictions in air flow around the vent terminal.
- Check fan for proper operation.
- Check for foreign materials in the combustion chamber and exhaust piping.
- Check for blockage in the heat exchanger.
- Confirm unit has been set up to operate on gas type connected to the unit
- Replace gas valve assembly
17
Venturi Blockage
- Ensure Venturi isn't blocked.
- Replace venturi and zero governor gas valve assembly.
- Contact Rinnai for assistance in re-setting unit if error re-appears
19
Electrical grounding
- Check components for an electrical short.
- Confirm all wiring harnesses are properly connected
21
Data transfer error
- If the P.C. board has been replaced, ensure the data transfer process is complete.
- Ensure all parameters were properly programmed for model of water heater in use.
- Ensure data transfer instructions were followed when installing new P.C. board.
- Data transfer not confirmed, follow step by step instructions for programming unit.
- Manually program all 14 parameters for your installation and product type per
instructions provided with new P.C. board.
Fault Codes
