Installation Sheet

32 Rinnai Corporation EX08CT, EX11CT Manual
[1] Only this code is dim.
[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.
[3] 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.
CODE DISPLAYED FAULT REMEDY
11 [1]
No Ignition
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. [2]
16 Room Overheat Ensure that room temperature is less than 104°F (40°C).
31
Room Temperature Thermistor
Disconnection (Open Circuit)
Service call.
32
Room Temperature Thermistor
Short Circuit
33
Overheat Thermistor 1
Disconnection (Open Circuit)
34
Overheat Thermistor 1
Short Circuit
49 Sensor Breakdown
53 Sparker
61 Combustion Fan
62 Convection Fan
70
ON/OFF Switch or “Set back”
Switch
71 Solenoids
72 Flame Rod
73 Communication Error
99 Flue Block Check around the flue terminal for blockage. [3]
Diagnostic Codes and Remedies
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 furnace 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.