Rinnai M Series Installation And Operation Manual page 80

Code Description
1P1 Flow Check 1 Failed
1P2 Flow Check 3 Failed
1P3 Flow Check 4 Failed
1P4 Filling Needed
Combi Domestic
201 Hot Water NTC
Damaged
203 Tank NTC Sensor
Damaged
303 PCB Fault
304 Too Many Reset
306 PCB Fault
309 Gas Relay Check
Failed
Scheduled
3P9 Maintenance-Call
Service
501 No Flame Detected Flame not detected
Flame Detected
with Gas Valve
502
Closed (False
Flame)
504 Flame Lift
5P1 1stIgnit Failed
5P2 2ndIgnit Failed
5P3 Flame Lift
612 Fan Error
1P9 Water Pressure
Dynamic Check
140 Water Pressure
Dynamic Check
80
Reason(s)
Change in supply temperature
of 12.6° F to 27° F in one
second
The supply water temperature
is more than 99°F higher than
the return water temperature
The return water temperature
is 18° F higher than the supply
water temperature
Supply pressure is below the
warning pressure
The Domestic Hot Water
sensor has a short or open
circuit
The tank probe has a short or
open circuit
PC board software or
hardware error
The Reset button was pressed
more than 5 times in 15
minutes
PC Board error
Flame detected for 3 seconds
after the gas valve closed
The maintenance timer has
expired
Flame detected before the gas
valve opened
Loss of flame during burner
operation
Flame not detected during the
first ignition attempt
Flame not detected during the
second ignition attempt
Loss of flame during burner
operation
Fan speed is too high or too
low
No pressure change after 5
seconds of running the pump
Two 1P9 water pressure
checks failed
Fault Location
Central Heating
operation
Central Heating
operation
Central Heating
operation
Central Heating
operation
Domestic Hot
Water operation
Domestic Hot
Water operation
PC Board
PC Board
PC Board
PC Board
PC Board
Flame ignition/
detection
Flame ignition/
detection
Flame ignition/
detection
Flame ignition/
detection
Flame ignition/
detection
Flame ignition/
detection
Fan/Vent
Central Heating
operation
Central Heating
operation
Rinnai M-Series Condensing Boiler Solo Manual
How to Resolve
The boiler will
attempt to correct for
10 seconds
The boiler will
attempt to correct for
10 seconds
The boiler will
attempt to correct for
10 seconds
Raise the supply
pressure above the
minimum pressure
Troubleshoot the
Domestic Hot Water
sensor
Troubleshoot the tank
probe
Press the Reset
button
Wait for 15 minutes
to elapse without
pressing the Reset
button
Press the Reset
button
Press the Reset
button
Reset the monthly
timer for the next
maintenance interval
reminder
Press the Reset
button
Troubleshoot the
flame rod, igniter,
electrode, and gas
valve
Press the Reset
button
Fault will go away at
the end of the second
ignition attempt
Fault will go away at
the end of the third
ignition attempt
Fault will go away
with proper ignition
Press the Reset
button
The boiler will check
the pressure for 30
seconds and the error
will go away with
proper inlet pressure
Press the Reset
button