Installation Manual

Rinnai I-Series Condensing Boiler Solo Manual 101
540
High Exhaust Temperature
• Check the exhaust thermistor wiring for
damage.
• Clean the surface of the thermistor.
• Measure the resistance of the exhaust
thermistor.*
• If the sensor has been replaced and the
error sll appears, check the return
thermistor.
• Check the exhaust duct, seal, and
venng for damage.
610
Combuson Fan
• Check the motor wire harness for loose
or damaged connecons.
• Measure resistance and voltage of
motor wire harness.*
• Ensure the combuson fan spins freely.
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.
* See “Electrical Diagnoscs” on Technical Data
Sheet located on inside front cover of boiler.
363
Return Thermistor
• Check sensor wiring for damage.
• Measure the resistance of the sensor.
• Replace if necessary.
393 Outdoor Thermistor
• Ensure that DIP switch 1 is set to the
appropriate posion.
• Check sensor wiring for damage.
• Measure the resistance of the sensor.
• Replace if necessary.
400 Pressure Sensor
• Check sensor wiring for damage.
• Measure the voltage of the sensor.
• Replace if necessary.
430
High/Low Water Pressure
• If the water pressure is too low, add
water into the system unl at least 13
PSI is observed.
• Ensure there are no leaking
components in the CH system.
• If the pressure is too high, adjust the
pressure to a maximum of 30 PSI.
• Ensure the pressure relief valve and
water ll are working correctly.
• Ensure deaeraon has been
performed.
443
Low Water Cut-O (LWCO)
• Ensure the LWCO device is working
correctly.
• Ensure the LWCO jumper is connected
properly when LWCO is not in use.
• Ensure the output is 24 VAC on the
PCB. If it is not, check the transformer
harness and output of the transformer.
520
Solenoid Valve Circuit
• Check the ame rod and wire for
damage.
• Close the gas shut o valve installed
near the boiler.
• Ensure the ame rod and wire are not
wet.
• Check the output from the PC Board to
the solenoid gas valve.
• If the output from the PC Board is
abnormal, replace the PC Board.
• If the output from the PC Board is
normal, replace the gas control.