I Series Solo Installation Manual

101
Rinnai I-Series Condensing Boiler Solo Manual
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.
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.
PC Board
 PC Board circuit error.
 Replace PC Board.
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.
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.
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.
Return Thermistor
 Check sensor wiring for damage.
 Measure the resistance of the sensor.
 Replace if necessary.
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.
Pressure Sensor
 Check sensor wiring for damage.
 Measure the voltage of the sensor.
 Replace if necessary.
High/Low Water Pressure
 If the water pressure is too low, add
water into the system unl at least 13
PSI (0.9 bar) 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 (2.1
bar).
 Ensure the pressure relief valve and
water ll are working correctly.
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.
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.