Fault Codes - Rinnai RHFE-750ETRA Owner's Operation & 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 Fault Code Display window and the Operation Indicator
will flash green.
Code
11 Ignition failure
12 Incomplete combustion
14 Filter blocked or Overheat
16 Room overheat
31 Room temperature sensor faulty
32 Overheat temperature sensor 2 faulty Service call
33 Overheat temperature sensor 1 faulty Service call
49 Flue block sensor faulty
53 Spark sensor faulty
61 Fan motor faulty
71 Solenoids faulty
72 Flame detection circuit fault
73 Communication fault
99 Flue block
Replacement of Thermal Fuse
The cause of the overheat condition needs to be
determined and remedied before replacing the
thermal fuse.
A qualified service technician needs to:
1. Disconnect the appliance from the power supply.
2. Remove the right hand side panel to allow access
to the gas control and main PCB.
3. Unplug the thermal fuse harness (including the
control plug for the POV on the gas control) and
unscrew thermal fuse.
4. Re-assemble with replacement thermal fuse.
14
Fault
Rinnai Corporation RHFE-750ETRA
Confirm that the gas supply is turned on. Switch appliance to
STANDBY and then ON again. If ignition failure continues
then a Service call is required.
Service call
Clean filters
If overheating continues then a service call is required to
determine the cause.
Thermal fuse; a qualified service technician must replace the
fuse following the procedure below.
The temperature has reached 104° F (40° C). Turn the
appliance off or engage the AUTO OFF function to prevent the
display of flame. See AUTO OFF section.
Service call
Service call
Service call
Service call
Service call
Service call
Service call
Check around flue terminal for obstructions to air flow
Thermal Fuse
Remedy
PCB
POV