Fault Isolation - Other Issues - Rinnai RHFE-551FA Service Manual

Fault Isolation - Other Issues

AT IGNITION:
Heater does not operate.
Warm air does not flow when the burner
lights.
Smoke or strange smells are produced
on the first trial light up after installation.
Sharp clicking noised at ignition, or
when unit shuts down, or goes out.
DURING COMBUSTION:
Clunking noise when the thermostat
operates.
Unit is not heating room.
Air filter is blocked or the louvers are
blocked.
Heater will not re-ignite after overheating
DURING COMBUSTION:
Convection fan continues to run after
turning OFF
OTHER POINTS:
Steam is discharged from the flue
terminal.
Unit shuts off without apparent reason.
Power Failure
10
Is the heater plugged in?
Have the fuses or breaker blown at the fuse box / breaker panel?
Is there a power failure?
Is the air filter blocked?
Is anything blocking the outlet for the hot air?
Is the flue blocked?
The fan is started automatically after a short delay. This is to allow the
heat exchanger to warm up, helping to avoid cold draughts.
This is caused by grease, oil, or dust on the heat exchanger and will stop
after a short time.
This is simply expansion noise from the heat exchanger.
This is the sound of the solenoid gas valves opening and closing.
Is the air filter blocked?
Is the set temperature high enough?
Is the warm air outlet blocked by anything?
Are the doors and windows of the room closed?
Was the appliance correctly sized for the space?
Allow heater to cool, clean air filter, and operate again.
Even after unit has cooled down, the heater does not ignite again. Repair
is necessary by a qualified service provider.
This is to remove the residual heat from the heat exchanger. The fan will
stop when the heater cools down.
High efficiency appliances tend to discharge water vapor on cold days.
This is normal.
Check whether filters are blocked. Dirty filters will cause the heater to
overheat.
Switch OFF, then ON again when power is restored to re-set controls.
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