Fault Codes - Rinnai ES38 Owner's Operation And Installation 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.
CODE DISPLAYED
FAULT REMEDY
Check that gas is turned ON.
Check that the vent termination is not
11 Ignition Failure blocked.
Refer to the Restart Function explanation.
Service call if repeated.
14 Overheat
Clean filter.
Service call if repeated. [1]
16 Room Overheat
Lower room temperature to less than 104°F
(40°C).
31
Room Temperature Sensor
Service call.
32
Faulty
33
Overheat Temperature Sensor
Service call.
34
Faulty
49 Sensor Breakdown Service call.
53 Sparker Failure Service call.
61 Combustion Fan Failure Service call.
70
Faulty ON/OFF Switch Service call.
71 Faulty Solenoids
Service call.
72 Faulty Flame Rod Service call.
73 Communication Error Turn heater OFF, then ON again.
99 Flue Block
Check around the flue terminal for blockage.
[2]
[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.
12 Rinnai Corporation ES38 Manual