iHeat Operation Guide: 12063-A 01-13 | 13
Troubleshooting
This troubleshooting guide assumes the iHeat system and Rinnai Infinity have been installed
correctly, including the ducting, and that nothing is broken.
Symptom Possible cause Check Action
No thermostat display No batteries, or batteries
are flat
Check batteries Recharge or replace batteries
iHeat fan not operating in
heating mode
No power to the iHeat Check if the bottom green
LED light is on (p. 14)
No: There could be a problem with the power
point. Check power point with another
appliance (light, hair dryer etc.).
Yes: Indicates there is power to the iHeat, but
there is something wrong with the connection
between the iHeat and the thermostat—this
will require a service call.
Thermostat not
requesting heat
Check if the thermostat has
been programmed correctly
Review thermostat settings
No hot water from the
Rinnai Infinity
Check if hot water is present
by turning on a hot water tap
No: Ensure there is gas and power to the unit.
Yes: Check iHeat unit, is the red LED double
flashing? If yes then rectify issue by resetting
the thermostat. Do this by turning the ‘System’
off, then turning the ‘System’ to heat—wait
30 secs.
Insufficient water flow to
pump
Check if the red LED is double
flashing
If yes, reset the thermostat by turning the
‘System’ off, then turning the ‘System’ to
heat—wait 30 secs.
Check if the Rinnai Infinity
water filter is blocked
Clean Rinnai Infinity water filter (p. 10)
Check if air is in the heating
circuit
Operate easing gear on the pressure relief
valve for two minutes (p. 14). Make sure the
gas, power, and water has been turned off
to the Infinity, and that a drain line has been
fitted.
Water drips from the
pressure relief valve
Service call
Water drips from the
iHeat overflow
Leak in iHeat unit Service call
iHeat pump operates for
no reason
Biosafe operation (p. 15) If operating at an inconvenient time (i.e.
midnight), turn power at mains to the iHeat
off and on at a convenient time to reset the
biosafe operation.
Room temp. varying too
much
Thermostat setting not
suitable for installation
Contact Rinnai, thermostat configuration 0680
may need to be changed to 3.
Infinity switching on too
much
Thermostat setting not
suitable for installation
Contact Rinnai, thermostat configuration 0680
may need to be changed to 1.
Thermostat temp. varies
to that of my trusted
thermometer
Thermostat setting not
suitable for installation
Contact Rinnai, thermostat configuration 0700
may need to be changed.
House not warm enough Rinnai Infinity dip switch
set too low
Check installation checklist to
view Infinity dip switch setting
Request installer to change Rinnai Infinity dip
switch setting.
Excess noise at return air
grille
Blocked return air filter Check air return filter Clean return air filter (p. 10)
Check the following information before making a service call. There are some things you can do to investigate and
possibly fix. Some checks such as checking LED lights, bleeding air from the system etc. will depend on your level of
confidence. If you are still unsure or concerned after reading this section, please contact Rinnai.
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