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Rinnai Corporation ES17 / ES22 Manual
Fault Codes
If there is a malfunction the appliance may shut down
as a safety precaution and display a fault code to assist
in diagnosing the problem. The fault code will flash in
the display on the control panel. When making a
service call, this code will assist with diagnosing the
fault.
You may be able to clear the fault code by turning the
heater off and then on again. If the fault code remains
or returns on the next operation, contact Rinnai or your
nearest service agent and arrange for a service call.
[1] Remove any obstructions. The flue needs to be kept clear to expel exhaust gases. If the appliance fails to
operate contact a qualified service agency.
[2] If the fusible link needs replacement, it must be done by a qualified service agency. In addition, the cause of
the overheat needs to be determined. The fusible link is a one use safety device that breaks to shut off the
appliance.
CODE DISPLAYED
FAULT
REMEDY
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Check that gas is turned ON.
Check that the vent termination is not
blocked.
Refer to the Restart Function explanation.
Service call if repeated.
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Clean filter.
Service call if repeated. [1]
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1
Lower room temperature to less than 104°F
(40°C).
31
Room Temperature Sensor
Faulty
Service call.
32
33
Overheat Temperature Sensor
Faulty
Service call.
34
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61
Combustion Fan Failure
Service call.
70
Faulty ON/OFF Switch
Service call.
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73
Communication Error
Turn heater OFF, then ON again.
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Check around the flue terminal for blockage.
[2]
