Rinnai ThermaCirc360 RUR199i Installation And Operation Manual page 58

1 9
Electrical Grounding
•
Check all components for electrical short.
2 1
Data Transfer Error
•
If the PCB has been replaced, ensure the data transfer
process has been completed.
25
Condensate Pump (Accessory)
•
Confirm wire connections and harness are good.
•
Ensure condensate reservoir is empty and condensate
pump is operating.
32
Outgoing Thermistor
33
Heat Exchanger Thermistor
•
Check sensor wiring for damage.
•
Measure resistance of sensor.*
•
Clean sensor of scale build-up.
•
Replace sensor.
38
Exhaust Thermistor
41
Freeze Protection Thermistor
•
Check sensor wiring for damage.
•
Measure resistance of sensor.*
•
Replace sensor.
51
Inlet Thermistor
•
Check sensor wiring for damage.
•
Measure resistance of sensor.*
•
Clean sensor of scale build-up.
•
Replace sensor.
52
Gas Valve
•
Check flame rod and wire for damage.
•
Check gas solenoid valve for open or short circuit.*
•
Replace gas valve assembly.
•
Please call Rinnai technical department
5 4
High Exhaust Gas Temperature
•
Ensure Heat Exchanger fins are clean and not blocked.
•
Confirm inlet water temperature is not too high.
•
Clear diagnostic code by resetting the main power supply
to the water heater.
6 1
Combustion Fan
•
Check the motor wire harness for loose or damaged
connections.
•
Measure resistance of motor wire harness.*
•
Ensure the combustion fan spins freely.
FF
Maintenance Indicator
•
Placeholder in Diagnostic code history indicating that a service provider
performed maintenance or service.
•
Enter this code after performing service by pressing
and On/Off simultaneously.
•
FF
is visible on the monitor.
* See "Electrical Diagnostics" on Technical Data Sheet located on inside front cover of water heater.
58
6 3
Recirculation Low Flow
•
Ensure bypass plug is removed and bypass filter is installed.
(Crossover Mode)
•
Ensure both the inlet water filter and bypass filter are clean
and free of debris.
•
Ensure Parameter setting are correctly set for recirculation
mode.
•
Ensure Pump supply voltage.
•
Ensure air is removed from the recirculation line.
6 5
Water Flow Control
•
Measure resistance values of the water flow control.*
•
The water flow control valve has failed to close during the
bath fill function. Immediately turn off the water and
discontinue the bath fill function. Contact a licensed
professional to service the appliance.
7 0
PC Board
•
Replace PC Board
7 1
Solenoid Valve Circuit
•
Ensure dip switch on PC board is in the OFF position.
•
Ensure gas control wire is not loose or damaged.
•
Ensure heater circuit is not grounded.
•
Replace PC Board.
7 2
Flame Rod
•
Check flame rod and wire for damage.
•
Verify HEX is not leaking.
5 5
(SS) Service Soon (Flush Heat Exchanger)
•
55
is a time-based service indicator set during installation.
See section "3.12 Parameter Settings" for additional details
on setting and changing the
•
55
indicates that it is time for service. The heat exchanger
should be flushed to prevent damage (refer to section "5.3
Flushing the Heat Exchanger" for more information). Hard
water must be treated to prevent scale build-up or damage
to the heat exchanger.
•
To reset the
temperature controller 5 times in 5 seconds.
NO CODE - Nothing happens when water flow is
activated
•
Verify you have at least the minimum flow rate required to
fire unit.
•
Measure the resistance of the water flow control sensor.*
•
Clean inlet water supply filter.
•
On new installations ensure hot and cold water lines are not
reversed.
(Up) , (Down)
Rinnai Tankless Water Heater Installation and Operation Manual
55
indicator.
55
code, push the On/Off button on the
FF
1
2
3