Rinnai RHFE-750ETRA Fault Codes, Replacement of Thermal Fuse, Code Fault Remedy

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	Fault	Remedy
		Confirm that the gas supply is turned on. Switch appliance to
11	Ignition failure	STANDBY and then ON again. If ignition failure continues
		then a Service call is required.
12	Incomplete combustion	Service call
		Clean filters
		If overheating continues then a service call is required to
14	Filter blocked or Overheat	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
16	Room overheat	appliance off or engage the AUTO OFF function to prevent the
		display of flame. See AUTO OFF section.
31	Room temperature sensor faulty	Service call
32	Overheat temperature sensor 2 faulty	Service call
33	Overheat temperature sensor 1 faulty	Service call
49	Flue block sensor faulty	Service call
53	Spark sensor faulty	Service call
61	Fan motor faulty	Service call
71	Solenoids faulty	Service call
72	Flame detection circuit fault	Service call
73	Communication fault	Service call
99	Flue block	Check around flue terminal for obstructions to air flow

Replacement of Thermal Fuse

The cause of the overheat condition needs to be	Thermal Fuse
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.

PCB

POV

14 Rinnai Corporation RHFE-750ETRA