Rinnai ENERGYSAVER RHFE-308FTR Service Manual page 39

e. The convection fan doesn't rotate.
i) Convection fan shaft allen screw loose.
ii) An obstruction in the convection fan is preventing it from rotating.
iii) Flame rod faulty.
iv) Faulty PCB.
B. After repeated efforts to operate the appliance, it will not ignite. ... 11 flashing
i) Air in the gas supply line.
ii) Incorrect gas pressure.
iii) Incorrect gas type, or a kink or break in the gas supply.
iv) Faulty or weak spark.
v) Blocked injector. Is the combustion specification correct?
C. There is the sound of ignition, however the 'combustion' injector does not glow red.
After 15 seconds the spark stops and mis-ignition occurs.
Miss-ignition
Confirm the flame rod current.
Has the current risen above 1.0 µA.
Yes
Faulty PCB
Energysaver RHFE-308 FTR
Ignition OK
1. Faulty indicator/incorrect wiring.
2. Faulty PCB.
No
1. Check combustion specification, gas
type, and gas pressure.
2. Check the combustion condition.
3. Check flame rod is firmly positioned.
4. Check the flame rod lead.
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