Rinnai I Series User Manual

Rinnai I-Series Condensing Boiler Combi Manual 103
700
PC Board
• PC Board circuit error.
• Replace PC Board.
710
Solenoid Valve Circuit
• Ensure Dip switch 5 on the PC Board is in
the OFF posion (default).
• Ensure the gas control wire is not loose or
damaged.
• Replace the PC Board.
720
Flame Rod
• Check the ame rod and wire for damage.
• Ensure the ame rod and wire are not wet.
• If there is no issue with the ame rod or
wiring, replace the PC Board.
890
Freeze Issue
• The boiler checks the heat exchanger
temperature at the me of operaon.
• If the temperature is too low, an error will
occur.
• Check if there is freezing in the boiler or
CH system.
999
PC Board Mismatch
• This code occurs when the PC Board and
the internal logic do not match.
• Check if the soware versions of the board
and operaon board do not match.
LC
Scale Buildup in Heat Exchanger
• Flush the DHW plate heat exchanger.
• The LC code will reset automacally when
scaling is removed. If the LC code remains,
check the DHW thermistor, ow sensor or
boiler pump.
FFF
Maintenance Indicator
• This code is a placeholder in diagnosc
code history indicang a service provider
performed maintenance or service.
• Enter this code aer performing service by
pressing and holding the Up buon, then
press and hold the Down buon, and then
press the DHW buon simultaneously. FFF
will appear on the display.
No
Code
Nothing happens when DHW water ow is
acvated
• Verify the minimum ow rate required
to re the boiler is seen.
• Measure the resistance of the ow
control sensor.*
• Clean the inlet water supply lter.
• On new installaons, ensure the hot and
cold water lines are not reversed.
• Conrm the inlet water temperature is
not too high.
• Ensure the integrated boiler pump
operates properly.
• Ensure the DHW operaon switch is on.
No
Code
Decreasing or uctuang DHW water ow
volume
• Ensure the gas pressure is proper.
• Ensure the water pressure is proper.
• Ensure the inlet water lter for DHW is
clean.
• Ensure there is not lime scale buildup
present.
• Ensure the vent and vent sengs are
properly set up.
• If a DHW recirculaon system is used,
the DHW ow volume may vary slightly.
• Ensure all air has been purged from the
system.
• Ensure the pump is set to speed 3.
• During simultaneous CH and DHW
operaon mode, it is possible to see
decreased DHW ow.
No
Code
Fluctuang DHW outgoing temperature
• Ensure the gas pressure is proper.
• Ensure the water pressure is proper.
• Ensure the DHW thermistor, ow servo,
and bypass servo are in good condion.
• Ensure the inlet lter for DHW is clean.
• If a DHW recirculaon system is used,
the DHW temperature may vary slightly.
• Ensure all air is removed from the
system.
No
Code
Boiler does not start heang with a heang
demand present
• Supply temperature or return
temperature inside the boiler may be
too hot.
• Ensure the pump operates properly.
• If there is a demand immediately aer
using DHW, wait at least three minutes
for operaon.
* See “Electrical Diagnoscs” on Technical Data
Sheet located on inside front cover of boiler.
Up and Down
E;FFF
Press the DHW
buon

Rinnai I Series Specifications

General

Brand	Rinnai
Model	I Series
Category	Boiler
Language	English