Use and Care Manual

Rinnai M-Series Condensing Boiler User’s Informaon Manual 13
Code Descripon Reason(s) Fault Locaon How to Resolve
1P1 Flow Check 1 Failed
Change in supply temperature of 12.6°
F to 27° F in one second
Central Heang
operaon
The boiler will aempt
to correct for 10
seconds
1P2 Flow Check 3 Failed
The supply water temperature is more
than 99°F higher than the return water
temperature
Central Heang
operaon
The boiler will aempt
to correct for 10
seconds
1P3 Flow Check 4 Failed
The return water temperature is 18° F
higher than the supply water
temperature
Central Heang
operaon
The boiler will aempt
to correct for 10
seconds
1P4 Filling Needed
Supply pressure is below the warning
pressure
Central Heang
operaon
Raise the supply
pressure above the
minimum pressure
201
Combi Domesc Hot
Water NTC Damaged
The Domesc Hot Water sensor has a
short or open circuit
Domesc Hot
Water operaon
Troubleshoot the
Domesc Hot Water
sensor
203
Tank NTC Sensor
Damaged
The tank probe has a short or open
circuit
Domesc Hot
Water operaon
Troubleshoot the tank
probe
303 PCB Fault PC board soware or hardware error PC Board Press the Reset buon
304 Too Many Reset
The Reset buon was pressed more
than 5 mes in 15 minutes
PC Board
Wait for 15 minutes to
elapse without pressing
the Reset buon
306 PCB Fault PC Board error PC Board Press the Reset buon
309 Gas Relay Check Failed
Flame detected for 3 seconds aer the
gas valve closed
PC Board Press the Reset buon
3P9
Scheduled Maintenance-
Call Service
The maintenance mer has expired PC Board
Reset the monthly
mer for the next
maintenance interval
reminder
501 No Flame Detected Flame not detected
Flame ignion/
detecon
Press the Reset buon
502
Flame Detected with Gas
Valve Closed (False
Flame)
Flame detected before the gas valve
opened
Flame ignion/
detecon
Troubleshoot the ame
rod, igniter, electrode,
and gas valve
504 Flame Li Loss of ame during burner operaon
Flame ignion/
detecon
Press the Reset buon
5P1 1stIgnit Failed
Flame not detected during the rst
ignion aempt
Flame ignion/
detecon
Fault will go away at the
end of the second
ignion aempt
5P2 2ndIgnit Failed
Flame not detected during the second
ignion aempt
Flame ignion/
detecon
Fault will go away at the
end of the third ignion
aempt
5P3 Flame Li Loss of ame during burner operaon
Flame ignion/
detecon
Fault will go away with
proper ignion
612 Fan Error Fan speed is too high or too low Fan/Vent Press the Reset buon
1P9
Water Pressure Dynamic
Check
No pressure change aer 5 seconds of
running the pump
Central Heang
operaon
The boiler will check the
pressure for 30 seconds
and the error will go
away with proper inlet
pressure
140
Water Pressure Dynamic
Check
Two 1P9 water pressure checks failed
Central Heang
operaon
Press the Reset buon