84
Rinnai M
-
Series Condensing Boiler Combi Manual
Code
Description
Reason(s)
Fault Location
How to Resolve
1P1
Flow Check 1
Failed
Change in supply temperature
of 12.6°F to 27°F in one second
Central Heating
operation
The boiler will attempt
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 Heating
operation
The boiler will attempt
to correct for 10
seconds
1P3
Flow Check 4
Failed
The return water temperature is
18°F higher than the supply
water temperature
Central Heating
operation
The boiler will attempt
to correct for 10
seconds
1P4
Filling Needed
Supply pressure is below the
warning pressure
Central Heating
operation
Raise the supply
pressure above the
minimum pressure
201
Combi Domestic
Hot Water NTC
Damaged
The Domestic Hot Water sensor
has a short or open circuit
Domestic Hot
Water operation
Troubleshoot the
Domestic Hot Water
sensor
203
Tank NTC Sensor
Damaged
The tank probe has a short or
open circuit
Domestic Hot
Water operation
Troubleshoot the tank
probe
303
PC Board Fault
PC Board software or hardware
error
PC Board
Press the
Reset
button
304
Too Many Reset
The
Reset
button was pressed
more than 5 times in 15 minutes
PC Board
Wait for 15 minutes to
elapse without pressing
the
Reset
button
306
PC Board Fault
PC Board error
PC Board
Press the
Reset
button
309
Gas Relay Check
Failed
Flame detected for 3 seconds
after the gas valve closed
PC Board
Press the
Reset
button
3P9
Scheduled
Maintenance
-
Call Service
The maintenance timer has
expired
PC Board
Reset the monthly
timer for the next
maintenance interval
reminder
501
No Flame
Detected
Flame not detected
Flame ignition/
detection
Press the
Reset
button
502
Flame Detected
with Gas Valve
Closed (False
Flame)
Flame detected before the gas
valve opened
Flame ignition/
detection
Troubleshoot the flame
rod, igniter, electrode,
and gas valve
504
Flame Lift
Loss of flame during burner
operation
Flame ignition/
detection
Press the
Reset
button
5P1
1stIgnit Failed
Flame not detected during the
first ignition attempt
Flame ignition/
detection
Fault will go away at the
end of the second
ignition attempt
5P2
2ndIgnit Failed
Flame not detected during the
second ignition attempt
Flame ignition/
detection
Fault will go away at the
end of the third ignition
attempt
5P3
Flame Lift
Loss of flame during burner
operation
Flame ignition/
detection
Fault will go away with
proper ignition
612
Fan Error
Fan speed is too high or too low
Fan/Vent
Press the
Reset
button
1P9
Water Pressure
Dynamic Check
No pressure change after 5
seconds of running the pump
Central Heating
operation
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 Heating
operation
Press the
Reset
button
Содержание M Series
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