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Rinnai Tankless Water Heater Installation and Operation Manual 74


15
Venturi Control





16
High Outgoing Temperature
(safety shutdown because water heater
is too hot)



17
Venturi Blockage




blocked.

19
Electrical Grounding

short.
21
Data Transfer Error



25
Condensate Pump (Accessory)

are good.


32
Outgoing Thermistor




33
Heat Exchanger Thermistor

troubleshooting.
38
Exhaust Thermistor


Replace sensor.
41
Freeze Protection Thermistor

troubleshooting.
51
Inlet Thermistor



Replace sensor.
52
Gas Valve


short circuit.*

Please call Rinnai technical

54
High Exhaust Gas Temperature

and not blocked.

too high.


heater.
61
Combustion Fan



harness.*


63
Recirculation Low Flow




debris.




recirculation line.
65
Water Flow Control




󰀨



70
PC Board
Replace PC Board
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