Rinnai RHFE-750ETRA Manuale Utente

 

14 

            Rinnai Corporation RHFE-750ETRA 

 

  Fault 

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.   

11 Ignition 

failure 

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. 

12 Incomplete 

combustion 

Service 

call 

14 

Filter blocked or Overheat 

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. 

16 Room 

overheat 

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. 

31 

Room temperature sensor faulty 

Service call 

32 

Overheat temperature sensor 2 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 

33 

Overheat temperature sensor 1 faulty  Service call 

49 

Flue block sensor faulty 

Service call 

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. 

PCB 

POV 

Thermal Fuse