Installation Guide

Rinnai Corporation EX38C Manual 13
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] 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.
[2] 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.
[3] Only this code is dim.
CODE DISPLAYED FAULT REMEDY
11 [3] Ignition Failure
Check that gas is turned ON.
Check that the vent termination is not 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).
Service call.
30
Overheat Temperature Sensor
Disconnection (open circuit)
31
Room Temperature Sensor
Disconnection (open circuit)
32
Room Temperature Sensor
short circuit
33
Overheat Temperature Sensor
Disconnection (open circuit)
34
Overheat Temperature Sensor
short circuit
35
Overheat Temperature Sensor
short circuit
49 Sensor Breakdown
53 Sparker Failure
61 Combustion Fan Failure
62 Convection Fan Failure
70
Faulty ON/OFF Switch or
Faulty “Set Back” Switch
71 Faulty Solenoids
72 Faulty Flame Rod
73 Communication Error Turn heater OFF, then ON again.
81 Solenoid Valve Failure Service Call
99 Flue Block Check around the flue terminal for blockage. [2]