Rinnai Continuous Flow Water Heaters User manual

Continuous Flow Water
Heaters
Operation Manual
Internal Rinnai continuous flow water heaters must be installed with an approved Rinnai
flue system
Appliance must be installed, commissioned and serviced by a licensed tradesperson in
accordance with these instructions and all applicable local rules and regulations
Models are not suitable as a spa or swimming pool heater
Owner, please retain this manual for future reference
All gas appliances require regular servicing
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For Rinnai continuous flow water heaters manufactured from 2010 onwards
(serial number 09.12—xxxxxx)
Installer, please leave this manual with the owner

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LIMITED WARRANTY
The Rinnai Warranty
Rinnai offers you real peace of mind with comprehensive warranty plans covering parts and
labour. For full details on Rinnai product warranties go to www.rinnai.co.nz.
This warranty is applicable to all Rinnai continuous flow water heaters installed from 2010. All
terms of the warranty are effective from the date of installation.
Warranty Summary
Rinnai Continuous
Flow Water Heater
Application Heat Exchanger All Other Parts
Parts Labour Parts Labour
White domestic
models
Domestic
WITHOUT Rinnai
controllers
10 years pro rata 3 years 3 years 3 years
Domestic WITH a
Rinnai controller
12 years pro rata 3 years 5 years 3 years
Commercial 1,500 hours or 1
year pro rata*
1,500 hours or
1 year*
1,500 hours or
1 year*
1,500 hours or 1
year*
Silver commercial
models
Domestic
WITHOUT Rinnai
controllers
12 years pro rata 3 years 5 years 3 years
Commercial 5,000 hours or 3
years pro rata*
1,500 hours or
1 year*
1,500 hours or
1 year*
1,500 hours or 1
year*
* Whichever comes first
Domestic vs commercial applications
A domestic application is defined as an installation where a continuous flow unit is set to
55 °C1or lower, delivering hot water to a single residential dwelling (not used for commercial
purposes2).
All other installations are defined as commercial applications.
For constant use applications such as, underfloor heating, circulating ring mains, spa pools (but
not limited to), the water heater must be sized and installed according to written guidelines
from Rinnai.
1 A solar installation using a Rinnai continuous flow unit in a single residential dwelling is considered a
domestic application.
2Examples of a commercial application in a domestic dwelling, hair salon, catering kitchen, motel,
communal care facility etc.

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Please keep these instructions in a safe place for future reference.
RECORD AND ATTACH YOUR PROOF OF PURCHASE BELOW:
Your Retailer:__________________________________________________
Name:________________________________________________________
Address:______________________________________________________
_____________________________________________________________
Telephone:( _______ ) __________________________________________
Date of Purchase: ______ / ______ / _________
Proof of Purchase
WARNING
Improper installation, adjustment, alteration, service or maintenance
can cause property damage, personal injury or loss of life.
For assistance or additional information contact Rinnai on
0800 RINNAI (0800 746 624).

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Contents
About Your Continuous Flow Water Heater 5
Warning About Hot Water 6
General Safety 6
General Information 7
General Controller Information 9
Universal Controller (Compact) 12
Kitchen Deluxe Controller 14
Bathroom Deluxe Controller 16
Troubleshooting 20
Service Record 22
Draining Your Water Heater 24
Installer Details 26

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About Your Continuous Flow Water Heater
Congratulations on purchasing the latest technology Rinnai continuous flow water heater.
Before using or operating your water heater
Ensure the installer talks to you about the use and care of this appliance and that you
understand these instructions. The installer also needs to complete:
their installer details (p. 26)
the Commissioning Checklist (verifies the water heater has been installed and
commissioned correctly) supplied with the appliance
The installer needs to leave the checklist and operation manual with you.
Read these instructions for an overview on what is detailed in this manual about the use,
care and servicing of your Rinnai continuous flow water heater.
Principle of operation
The opening of any hot water tap will automatically start the appliance. Once water is flowing
through the appliance the burner will be ignited by electronic ignition.
When the hot water tap is closed and water flowing through the appliance has stopped the
burner flame will extinguish.
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HOTHOT
COLDCOLD
ON!ON!
ON!ON! HOTHOT
COLDCOLD
OFF!OFF!
OFF!OFF!

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Warning About Hot Water
Excessively hot water is dangerous. Rinnai continuous flow water heaters
through the use of water controllers allow you to control the temperature
of hot water to safe levels.
Water temperatures above 55 °C can cause instant severe burns, such
as scalding and may even result in death. Those most at risk; children,
disabled, elderly, and the sick. Hot water at 65 °C (a common water
temperature in New Zealand) can severely burn a child in less than half a
second. At 55 °C (preset temperature for domestic Rinnai continuous flow
water heaters) it takes a half minute.
Always
Test the water temperature with your elbow before placing your child in the bath and feel
the water yourself before bathing or showering
Supervise children whenever they are in the bathroom
Make sure the hot water tap is turned off
Consider
Installing child proof tap covers or child resistant taps, both will prevent a child being able to
turn on the tap.
Never
Leave a toddler in the care of another child. They may not understand the need to have the
water temperature set at a safe level.
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General Safety
Keep flammable
materials,
spray cans, fuel
containers, pool
chemicals, trees,
shrubs etc. well
clear of the flue
outlet.
Do not:
Touch the unit
cover or the
flue outlet
Insert objects
into the flue
outlet
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HOT!

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General Information
Installation by a licensed tradesperson
Improper installation, adjustment, service or maintenance can cause serious injury, property
damage or death. Please ensure your installation is completed by a licensed tradesperson.
Frost kits
Frost protection is fitted as standard on all models. Frost protection operates
automatically (as required) whenever the appliance is connected to the electric power
supply.
If power has failed and there is a risk of damage from frost, turn off the gas supply to the unit
and open a tap slightly to allow flow through the unit. This may prevent damage from freezing.
If the appliance is not going to be used for an extended period and the electric power supply
is disconnected, turn off the water and gas supplies and arrange for your plumber to drain all
water from the appliance to prevent frost damage.
If for practical reasons a plumber is unable to drain your system we have an instruction sheet
on how to drain the unit at the back of this manual.
Safety devices
Your Rinnai continuous flow water heater has the following safety devices.
Flame failure - flame rod
Boil-dry protection - water flow sensor
Overheat protection (OHS) - 97 °C bi-metal switch
Overheat protection - 95 °C lockout thermistor
Fusible link - 129 °C thermal fuse
Pressure relief valve - open 2.1 MPa / close 1.5 MPa
Combustion fan rpm check - integrated circuit system
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Filter
Drain
Gas
Valve
GasColdHot
Turn Water Off
Turn Gas Off
Drain Water

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General Information
The flow will vary slightly depending on the incoming water temperature
and temperature selected. For example the water flow will be higher at
43 °C than at 55 °C.
There is also a minimum flow rate required for the continuous flow unit
to start. So if a hot water tap is only opened a fraction there may not be
enough flow to start the unit.
43°C
55°C
The Rinnai continuous flow water heaters are factory preset to a
temperature limit of 55 °C (excluding one commercial model - Infinity
HD200 external).
Temperature controllers are available to allow precise digital temperature
control—a great safety feature if you have young children. Controllers can
be fitted at any time (except in solar installations) after installation of the
hot water unit.
There is a recommended system layout for Rinnai continuous flow water
heaters used in solar installations. It is important your installer configures
your solar system correctly as water heaters in solar installations produce
higher than normal temperatures.
Rinnai water controllers cannot be used with Rinnai continuous flow
water heaters in solar installations as the hot water does not always pass
through the continuous flow unit.
Servicing
Rinnai has a service and spare parts network with personnel who are fully trained and
equipped to give the best advice on your Rinnai appliance. If your appliance needs
servicing, please call Rinnai (0800 746 624) from a land line and select option one for
a service centre in your area.
For reliable operation Rinnai continuous flow water heaters in domestic applications should
be serviced every two years (including inspection of the flue system if installed). A service
record has been provided at the back of this manual. For commercial applications Rinnai has a
recommended Commercial Maintenance and Servicing Schedule. This is available on request or
via our technical website - www.rinnai-tradesmart.co.nz.
Regular servicing is not covered by the Rinnai warranty.
Do not attempt to carry out any service work other than that mentioned in the troubleshooting
section. If you have any other faults or problems, please refer to your installer or contact
Rinnai.
Solar installations
Temperature limit - factory preset
Water flow

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General Controller Information
While hot water
outlets are
open the set
temperature may
be lowered BUT
not raised above
43 °C. Transfer of
priority between
controllers is not
possible. These are safety features.
Max.
43°C
To clean your water
controller, use a
soft damp cloth and
mild detergent.
DO NOT use
solvents.
S
O
L
V
E
N
T
Depending on
weather conditions
and the length of
pipe between the
hot water unit and
the outlet in use,
there may be a
variation between
the temperatures displayed at the water
controller and water outlet.
49°C
50°C
There is no need
to turn water
controllers off
after use.
As a safety
precaution,
if a kitchen
controller
temperature is
set above
50 °C,
transferring
and then
returning priority will result in a default
set temperature of 50 °C. This is a safety
feature.
Kitchen Kitchen
Bathroom
Do not push
the On/Off
button on any
controller when
the red water
heater ‘In Use’
indicator is on.
This will turn
off the water
heater causing the water to go cold.
Temperatures higher than
55 °C should not be able to
be selected on controllers
installed in bathrooms,
ensuites or toilets. This
is to reduce the risk of
burns from hot water. If
this is not the case, the controllers have
been incorrectly installed and you should
contact your installer.
Check the water
temperature
before use.
A parent or
carer should
ALWAYS check
the temperature
before a child
is placed in
contact with hot water.

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General Controller Information
Water controllers are an optional extra, they allow precise temperature control (no need to
mix hot and cold water). When used correctly, the hot water unit will deliver the selected
temperature, even when the water flow is varied, or when more than one tap is use.
Each water controller can be individually programmed, however the water heater can only
deliver one set temperature at any time. The available temperatures are as follows.
Kitchen Domestic
Commercial
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50, 55 °C
60, 65, 75 °C
Bathroom (hot water) 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50 °C
Bathroom (bath fill) 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48 °C
Suggested temperatures Kitchen
Shower
Bath fill
50 - 55 °C
37 - 43 °C
39 - 45 °C
To obtain water temperatures lower than 37 °C simply add cold water. Maintaining lower temperatures
helps save energy.
Rinnai controllers
Universal (Compact): temperature selection only
Kitchen Deluxe: temperature selection and voice prompting
Bathroom deluxe: temperature selection, shower saver, bath fill and voice prompting
Wireless: temperature selection only
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Controller configurations
A maximum of four water controllers can be fitted and a combination of wired and wireless
controllers can be used with the following limitations:
Maximum of one Kitchen Deluxe Controller (MC-100V)
Maximum of two Bathroom Deluxe Controllers (BC-100V)
Only one controller can be set to deliver 55 °C, this cannot be a Bathroom Deluxe
Controller
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General Controller Information
Controllers need to be turned on for delivery of hot water
The water heater will not heat water unless the controller(s) are turned on. If water is flowing
before a controller is turned on, the water heater will not heat the water. Turn off the tap for a
few seconds then turn on again.
Ignition problems
If the water heater fails to ignite, the ‘In Use’ button will not illuminate. The water heater will
not attempt re-ignition until water flow is stopped for a few seconds and then re-started.
When gas bottles have been changed or the gas supply is disrupted (controller may display
error code 11 or 12) ignition may fail and the ‘In Use’ button will not be lit. The water flow may
need to be stopped and re-started several times before the appliance will remain alight.

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Universal Controller (Compact)
WATER HEATER
'In Use' INDICATOR
DIGITAL MONITOR
TEMPERATURE
CONTROL BUTTONS
CONTROLLER
ON INDICATOR
TRANSFER BUTTON
ON/OFF BUTTON
Indicates that a water
heater is in operation and
delivering hot water.
Indicates the temperautre
selected. Error message will
flash in event of fault.
Used to select water temperature.
Indicates if this temperature
controller is in control of
water delivery temperature.
Used to transfer control priority
between the controllers.
The controller with
priority has command of the
hot water delivery temperature.
Used to switch the water
heater on and off.
HOT WATER
Turning on
Adjusting the
temperature
Muting the
‘beep’ sound
If the water controller is switched off (no digits displayed in the digital
window) press the On/Off button once.
The On indicator will illuminate, indicating the continuous flow water heater
will be ready to supply hot water once a hot water tap is opened.
Select the desired temperature using the ‘Hot water temp.’ up and down
buttons until the required temperature is displayed.
To operate the continuous flow water heater, open any hot water tap. This
will automatically light the burner providing hot water. The water heater ‘In
Use’ indicator will illuminate on the water controller.
Once the hot water is running, if the set temperature is either too hot
or cold, press the ‘Hot water temp.’ up or down buttons until the desired
temperature is reached.
The ‘beep’ sound can be muted by pressing the ‘Hot water temp.’ up and
down buttons simultaneously for more than 3 seconds.

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Turning on
Transferring
priority
Adjusting the
temperature
If the controllers are switched off (no digits displayed in the digital window),
press the On/Off button once.
The On indicator on the desired controller will illuminate, indicating that
the hot water unit will be ready to supply hot water once a hot water tap is
opened.
An illuminated On/Off indicator confirms that the desired controller is in
control of the water delivery temperature. If the On/Off indicator is not
illuminated press the Transfer button once.
The On/Off indicator on the controller will illuminate indicating that the hot
water temperature control has been transferred to this controller and that
the continuous flow water heater will be ready to supply hot water.
Select the desired temperature using the ‘Hot water temp.’ up and down
buttons until the required temperature is displayed. The water heater ‘In
Use’ indicator will illuminate on the water controller.
Once the hot water is running, if the set temperature is either too hot or
cold, press the ‘Hot water temp.’ up and down buttons until the desired
temperature is reached.
How to use two or more Universal water controllers
Universal Controller (Compact)

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Kitchen Deluxe Controller
ON/OFF BUTTON
DIGITAL
MONITOR
WATER HEATER
'In Use' INDICATOR
SPEAKER
UP AND DOWN BUTTONS
MODE BUTTON
WATER TEMPER ATURE
INDICATOR
SHOWER SAVER /
BATH FILL INDICATOR
CLOCK
TRANSFER BUTTON
Indicates that the Shower Saver /
Bath fill function is operating.
Indicates the selected hot water
temperature.
Used to switch the water heater on and
off. This button is illuminated when the
water heating system is on.
When in normal mode these
buttons are used to select the
water temperature.
In setup mode these buttons are
used to adjust the voice prompt
volume and set the clock.
Used to switch the controller
between normal, voice or clock
modes.
Used to transfer control priority
between the controllers. The
controller with priority has
command of the hot water
delivery temperature. This button
is illuminated when this controller
has priority.
Indicates the water heater is in
operation and delivering hot water.
12 Hour AM/PM clock display.
In the event of a fault, error
messages will flash here.
Turning on
Setting the
clock
If the water controller is switched off (no digits displayed in the digital
window) press the On/Off button once.
The On indicator will illuminate, indicating the continuous flow water heater
will be ready to supply hot water once a hot water tap is opened.
If more than one controller is fitted press the ‘Transfer’ button once to
transfer priority to the desired controller.
The clock is a 12 hour AM/PM display. To set the time press the ‘Mode’
button twice. In the digital monitor the word ‘Clock’ will be displayed and
the clock digits will flash, if this is the first time the clock has been set the
starting time will be AM 12:00.
Use the up and down buttons to select the desired time. Holding these
buttons down continuously cycles the digits. When you get close to the time
you wish to set, press the button intermittently to avoid going further than
the desired time.
To return to normal mode, press the ‘Mode’ button once. If no buttons are
pressed for approximately 10 seconds the controller will return to normal
mode.
The time is always displayed regardless of whether the controller is turned
On or Off. The clock may need resetting if power to the water heater is
disrupted due to a power failure or if the power is switched off over a
prolonged period.
The Kitchen Deluxe Controller is not water resistant, avoid direct exposure to
water or steam as these conditions may cause damage.

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Setting the
sound options
Adjusting
temperature
Voice prompts are only available when Deluxe Bathroom Controllers are
installed.
To set the sound options press the ‘Mode’ button once to place the
controller into voice mode. Use the up and down buttons to select the
desired audible setting as follows:
Voice High, Med, Low or off, sets the voice prompt volume but does not
affect the ‘beep’ sound when pressing the buttons.
Sound Off, mutes all voice prompts and audible tones.
To return to normal mode, press the ‘Mode’ button once, if no buttons are
pressed for approximately 10 seconds the controller will return to normal
mode.
Select the desired temperature using the ‘Hot water temp.’ up and down
buttons until the required temperature is displayed.
Once the hot water is running, if the set temperature is either too hot or
cold, press the ‘Hot water temp.’ up and down buttons until the desired
temperature is reached.
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Kitchen Deluxe Controller

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SOUND VOLUME BUTTON
SHOWER SAVER
/ BATH FILL BUTTON
ON/OFF BUTTON
Used to select clock setting mode.
Used to select voice and audible tone
options.
CLOCK SETTING BUTTON
WATER VOLUME BUTTONS
Used to select Shower Saver/Bath Fill
volumes.
TEMPERATURE BUTTONS
CLOCK & REMINDER VOLUME
INDICATOR
SPEAKER
TRANSFER BUTTON DIGITAL
MONITOR
WATER HEATER ‘In Use’
INDICATOR
SHOWER SAVER / BATH FILL
INDICATOR
WATER TEMPERATURE
INDICATOR
WATER VOLUME INDICATOR
Indicates the selected hot water
temperatures.
Indicates the water heater is in
operation and delivering hot water.
Indicates Shower Saver/Bath Fill volume
selected. Used to selected Shower Saver/Bath Fill
function.This button is illuminated when
this function is selected.
Used to switch the water heater on and
off. This button is illuminated when the
water heater is on.
Indicates the Shower Saver/Bath Fill
function has been selected and that a
shower is running or the bath is filling.
Used to transfer priority between
controllers. The controller with priority
has command of the hot water
temperature. This button is illuminated
when the controller has priority.
12 hour AM/PM clock display.
Indicates how much water still needs to
flow for the selected Shower Saver/Bath
Fill volume, decreasing while the shower
runs or the bath fills.
In the event of a fault, error message
codes will flash here.
In normal Shower Saver/Bath Fill modes
these buttons are used to select the
water temperature.
In clock mode these buttons are used to
set the clock.-
Turning on If the water controller is switched off (no digits displayed in the digital
window) press the On/Off button once.
The On indicator will illuminate, indicating the continuous flow water heater
will be ready to supply hot water once a hot water tap is opened.
If more than one controller is fitted press the ‘Transfer’ button once to
transfer priority to the desired controller.
Avoid getting water directly into the speaker as this may cause damage.
Bathroom Deluxe Controller

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Setting the
clock
Setting the
sound options
Adjusting
temperature
The clock is a 12 hour AM/PM display. To set the time press the ‘Clock’
button once. In the digital monitor the clock digits will flash, if this is the
first time the clock has been set the starting time will be AM 12:00.
Use the up and down buttons to select the desired time. Holding these
buttons down continuously cycles the digits. When you get close to the time
you wish to set, press the button intermittently to avoid going further than
the desired time.
To return to normal mode, press the ‘Clock’ button once. If no buttons are
pressed for approximately 60 seconds the controller will return to normal
mode.
The time is always displayed regardless of whether the controller is turned
On or Off. The clock may need resetting if power to the water heater is
disrupted due to a power failure or if the power is switched off over a
prolonged period.
To set the sound options press the ‘Sound Volume’ button and select the
desired audible setting as follows:
Voice High, Med, Low or off, sets the voice prompt volume but does not
affect the ‘beep’ sound when pressing the buttons
Sound Off, mutes all voice prompts and audible tones.
Press the up and down buttons to return to normal mode. If no buttons are
pressed for approximately 10 seconds the controller will return to normal
mode.
Press the ‘Temperature’ up and down buttons until the required temperature
is displayed.
Once the hot water is running, if the set temperature is either too hot
or cold, press the ‘Temperature’ up and down buttons until the desired
temperature is reached.
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Bathroom Deluxe Controller

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Initial settings
Setting
shower/bath
temperature
and volume
Temperature = 40 °C
Volume = 100 litres (range 30 - 400 litres)
With the system on, select a Deluxe Bathroom Controller. If it does not
have priority, press the ‘Transfer’ button once and the ‘Transfer’ button will
illuminate.
Press ‘Shower Saver/Bath Fill’ button once. The button will illuminate and
voice prompt and tone will sound. Ensure you have the voice and sound
turned on.
To select the desired delivery temperature use the ‘Temperature’ up and
down buttons. The selected temperature will be displayed on the digital
monitor and will remain as the default ‘Shower Saver/Bath Fill’ temperature
until it is changed or if the mains power is turned off for an extended
period.
When filling a bath for the first time, it is recommended that a low bath fill
volume such as 60 litres or lower be used. During subsequent bath fills the
volume can then be adjusted to suit your known bath volume or desired fill
level.
A volume counter (to highlight remaining volume of water to be delivered)
displays on the controller below the temperature display (replaces the clock
during ‘Shower Saver/Bath Fill’ operation).
•
•
Operating the shower saver and bath fill
Bathroom Deluxe Controller
When filling
the bath or if
the water has
been turned off
Be careful not to overfill the bath, an average bath volume is 160 litres. It is
recommended that when filling a bath for the first time you should:
remain by the bath during the filling process
use a low bath fill volume such as 60 litres or less
•
•
If the ‘Shower Saver/Bathfill’ is interrupted (water is turned off) for any
reason and there is more than half the volume of the set amount of water
delivered, the ‘Shower Saver/Bath Fill’ will reset itself back to normal
operation when turned on again.
For example:
Set
Volume
Delivered Volume (bathfill
interrupted - tap closed)
Delivered Volume (bathfill restarted
- tap turned on again)
160 L 50 L 110 L
160 L 110 L Resets back to normal operation

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Using shower
saver/bath fill
To stop shower
saver/bath fill
operations
When the
shower
saver/bath
fill operation
finishes
Using multiple
controllers
Press the ‘Shower Saver/Bath Fill’ button once. The button will illuminate
and a voice prompt and tone will sound. During ‘Shower Saver/Bath Fill’
operations the ‘Bath’ indicator will also be displayed on the Kitchen Deluxe
Controller digital monitor (when fitted).
The voice prompt will say “The hot water system is ready. Open the hot
water tap”. Open the hot water tap for the shower or bath.
The ‘In Use’ indicator will illuminate on all deluxe water controllers and the
shower will run or the bath will start to fill.
If you wish to stop the water flow while the shower saver/bath fill function
is in operation, press the ‘Shower Saver/Bath Fill’ button. The button will
flash and the voice prompt will say “Hot water is not available. Turn off all
hot water taps and push the ‘Bath Fill’ button”. Follow the voice prompt
instructions.
Once the shower saver/bath fill operation finishes, the following occurs:
Flow from the shower/bath hot water tap stops.
‘Shower Saver/Bath Fill’ button will flash.
Kitchen Deluxe Controller (if fitted) ‘Bath’ indicator will flash.
A tone will sound.
The voice prompt will say “Bath fill is complete. Turn off the bath hot
water tap and push the ‘Bath Fill’ button.
Follow the voice prompt instructions. Note, the water heater will not allow
hot water to flow from any fixture until the ‘Shower Saver/Bath Fill’ button
has been pressed.
The water heater can be turned on and off at any water controller. If more
than one controller is fitted, press the ‘Transfer’ button to transfer priority
to the desired water controller.
1.
2.
3.
4.
5.
Bathroom Deluxe Controller

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Troubleshooting
With controllers or status monitor
Your Rinnai continuous flow water heater has a self diagnostic capability. If a fault occurs, an
error code will flash on the digital monitor (if you have water controllers) or status monitor
(selected models only). This assists with diagnosing the fault and may enable you to overcome
a problem without a service call. Please quote the code displayed when contacting Rinnai.
Common
Error Codes
Fault Possible Solution
- Noticeable reduction of water flow. Inlet water filter needs to be cleaned. Service call.
03 Power interruption during bath fill, water will
not flow when power is back on.
Turn off all hot water taps and press On/Off twice.
10 Air intake or flue blocked. Service call.
11 No ignition, no gas supply. Check gas is turned on at water heater and gas meter
or cylinder.
12 Flame failure, low gas flow. Check gas is turned on at water heater and gas meter
or cylinder. Check there are no obstructions to the flue
outlet.
14 Over heat thermal fuse. Service call.
16 Over temperature warning. Service call.
32 Outgoing water temperature sensor faulty. Service call.
33 Heat exchanger outlet sensor faulty. Service call.
52 Gas modulating valve faulty. Service call.
61 Combustion fan failure. Service call.
65 Water flow control faulty (does not stop flow
properly).
Service call.
71 Microprocessor failure. Service call.
72 Microprocessor failure. Service call.
LC (00) Scale build-up in heat exchanger (when
checking maintenance code history, 00 is
substituted for LC)
Service call.
In all cases you may be able to clear the error code by turning the hot water tap off, then on
again. If this does not clear the error code, try pushing the On/Off button Off, then On again. If
the error code remains, contact Rinnai for advice.
Without controllers
Fault Possible Solution
Unit does not start. Check power is on at the unit. Check gas isolation valve
at the unit and gas meter are fully open.
Units starts and then shuts down immediately. Check power is still on. Check gas isolation valve at the
unit and gas meter are fully open. Open your hot water
tap fully.
Unit starts then water goes cold. Check power is still on. Open your hot water tap fully.
Faults caused by insufficient gas supply, insufficient water supply, gas quality, water quality,
installation errors or operation errors are not covered by the Rinnai warranty.