DeDietrich C 230 ECO User manual

C 230 ECO
Gas fired condensing boiler
User Guide
300015144-001-C
EN
D000651

2C 230 ECO 20/02/09 - 300015144-001-C
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 Used symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2 Safety instructions and recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4 Operating the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.1 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.1.1 Control panel DIEMATIC-m3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.1.2 Control panel K3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.2 Changing the settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2.1 Control panel DIEMATIC-m3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2.2 Control panel K3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
4.3 Stopping the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.3.1 Precautions to take if there is a danger of frost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.3.2 Precautions required in the case of long boiler stops (one or more years) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.4 Commissioning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.4.1 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5 Checking and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.1 Rating plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.2 Messages - Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6.2.1 Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6.2.2 Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
6.3 Technical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
7 Energy savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

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20/02/09 - 300015144-001-C C 230 ECO
1Introduction
1.1 Used symbols
Caution danger
Risk of injury and damage to equipment. Attention must be
paid to the warnings on safety of persons and equipment.
Specific information
Information must be kept in mind to maintain comfort.
ZReference
Refer to another manual or other pages in this instruction
manual.
DHW: Domestic hot water
PCU: Primary Control Unit (Operating management electronics)
SU: Safety Unit (Safety electronics)
PSU: Parameter Storage Unit (Boiler parameter storage)
CCE: Leak proofing system
1.2 General
Congratulations on your choice of a high quality product. We
strongly advise you to read the following instructions in order to
guarantee the optimal operation of your appliance. We are sure
that it will be entirely to your satisfaction and will meet with all
of your expectations.
`Keep these instructions in a safe place close to the appliance.
`For a proper operating of the boiler, follow carefully the
instructions.
`The manufacturer is not liable for any improper use of the
appliance or failure to maintain or install the unit correctly (the
user shall take care to ensure that the system is installed by a
qualified fitter).
`In the interest of customers, De Dietrich Thermique SAS are
continuously endeavouring to make improvements in product
quality. All the specifications stated in this document are
therefore subject to change without notice.
`Get your fitter to explain your installation to you.

4C 230 ECO 20/02/09 - 300015144-001-C
2 Safety instructions and recommendations
2.1 Safety instructions
Fire hazard
Do not stock products of an inflammable nature close to
the appliance.
If you smell gas, do not use a naked flame, do not smoke,
do not operate electrical contacts or switches (doorbell,
lights, motor, lift, etc.).
1. Cut the gas supply
2. Open the windows
3. Extinguish all flames
4. Evacuate the premises
5. Contact a qualified professional
6. Inform the gas supplier
Risk of intoxication
Do not obstruct the air inlets in the room (even partially).
If you smell flue gases
1. Switch the appliance off
2. Open the windows
3. Evacuate the premises
4. Contact a qualified professional
Risk of being burnt
Avoid direct contact with the flame viewport.
Depending on the settings of the appliance:
- The temperature of the flue gas conduits may exceed 60°C
- The temperature of the radiators may reach 95°C
- The temperature of the domestic hot water may reach 65°C
Risk of damage
Do not stock chloride or fluoride compounds close to the
appliance.
Install the appliance in frost-free premises.
Do not neglect to service the appliance: Contact a qualified
professional or take out a maintenance contract for the annual
servicing of the appliance.
2.2 Recommendations
Only qualified professionals are authorised to work on the
appliance and the instalation.
Before any work, switch off the mains supply to the
appliance.
Check regularly that the installation contains water and is
pressurised.
Keep the appliance accessible at all times.
Avoid draining the installation.
The appliance should be on Summer or Antrifreeze mode rather than
switched off to guarantee the following functions:
- Antifreeze protection
- Protection against corrosion on domestic hot water tanks fitted
with a titanium anode.

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20/02/09 - 300015144-001-C C 230 ECO
3 Description
26
27
21
19
9
15
17
18
20
13
12 14
25
24
23
22
1
30 28
29
2
3
5
4
7
8
6
10
11
16
0D 00658
1Flue gas discharge duct
2Measurement point O2/CO2(Emplacement for fue gas
sensor, Option)
3Air enclosure
4Control panel
5Burner
6Heat exchanger
7Inspection hatch
8Inspection cap / Cleaning
9Ignition electrode / Ionization probe
10 Heating body sensor
11 Return sensor
12 Condensates collector
13 Siphon
14 Silencer
15 Filling and emptying tap
16 Circuit breaker
17 Multivalve gas unit
18 Venturi
19 Fan
20 Mixer pipe
21 Flue gas pressure switch
22 Output sensor
23 Connector for the programming tool
24 Gas connection
25 Return connection
26 Flow connection
27 Reset button
28 Display DIEMATIC-m3
29 Air inlet (Protective cage)
30 General ON 8/ OFF 7switch

6C 230 ECO 20/02/09 - 300015144-001-C
4 Operating the appliance
4.1 Control panel
4.1.1 Control panel DIEMATIC-m3
Electromechanical components
1. General ON 8/ OFF 7switch
2. Reset button
3. Flap
4. Timed circuit breaker (4 A)
5. Connector for the programming tool
6. Display
The panel must always be supplied with 230V voltage:
- to ensure the anti-grip of the heating pump,
- to ensure Titan Active System® operation when a titanium anode
is protecting the DHW tank.
Furthermore, if an interactive remote control (CDI 2) is connected
and the 1switch is in the off 7position, there will be no display on
the CDI 2.
ZSee: "Control panel instructions"
12
35
6
D000645
4

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20/02/09 - 300015144-001-C C 230 ECO
Display
024681012141618202224
A
3 4 5 6
91011
8
2
1
BC
7
SUNDAY
1Text and numerical display
2Graphic display bar for the programme in circuit A, B or C
3Light area: Reduced temperature heating period or tank load disabled
4Dark area: Comfort temperature heating period or tank load enabled
5Flashing cursor showing the current time
6Number display (current time, adjusted values, parameters, etc.)
7Number of the boiler for which the parameters are displayed
ZControl panel instructions - See section 6.1: Access to the parameters of the slave boilers (Panel K3) in a cascade
8The arrows flash when setting values can be modified using the +and -keys
9Circuit operation symbols
>Opening the 3-way valve
=Closing the 3-way valve
:Displayed circuit pump on
A B C Name of the circuit displayed
10 Arrows indicating the chosen time programme (P1, P2, P3 or P4) for the circuit displayed, A, B, C, or the activation of
the manual summer mode
11 Symbols indicating that the following inputs/outputs are active
DHW load pump on
#Summer mode (Automatic or Manual)
DBurner on switch request

8C 230 ECO 20/02/09 - 300015144-001-C
4.1.2 Control panel K3
1. General ON 8/ OFF 7switch
2. Reset button
3. Connector for the programming tool
4. Timed circuit breaker (4 A)
123
D0006 37
D000645
4

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20/02/09 - 300015144-001-C C 230 ECO
4.2 Changing the settings
4.2.1 Control panel DIEMATIC-m3
Keys accessible when the flap is closed Keys accessible when the flap is open
ZSee Control panel instructions
Adjustment keys
MODE Various operating modes can be selected by
successively pressing key MODE:
`AUTOMATIQUE
`DAY 7/7: Forced operation at permanent Day temperature
`DAY (Until midnight): Forced operation at temporary Day
temperature
`NIGHT 7/7: Forced operation at permanent Night
temperature
`NIGHT (Until midnight): Forced operation at temporary
Night temperature
`DAYS ANTIFREEZ: Antifreeze mode for the number of
days set
`ANTIFREEZ 7/7: Permanent antifreeze mode
Restart key for a DHW calorifier load
`AUTOMATIQUE
`DHW: Restarts DHW load until midnight
`DHW 7/7: DHW load is forced permanently
After a few seconds, the display disappears but the mode
is activated.
+Display key for the various counters (number of burner
start-ups, number of burner operating hours, etc.)
2% Set temperatures Day (Heating / DHW / Pool)
2$ Set temperatures Night (Heating / DHW)
*Access key to the slave boilers (Panel K3) in a cascade
If using only one boiler, this key is inactive.
(Setting the gradients for circuits A, B and C
)
Setting the parallel offsets DECAL.// DEP.A, DECAL.//
DEP.B or DECAL.// DEP.C for the heating curves on
circuits A, B or C.
If the Day setting for one of the circuits, A, B or C, is
above 30°C, you no longer have access parallel offset on
this circuit.
+/- Adjustment keys
Adjustment keys
%O Enter (per 1/2 hour) the comfort temperature
period or tank load enabled (dark area).
$P Enter (per 1/2 hour) the reduced temperature
period or tank load disabled (light area).
STANDARD
Simultaneously pressing the 2 keys, %O and
$P, resets all of the time programmes.
SReturn key
JPage scrolling
ILine scrolling
*Scroll of boilers connected
#Manual "Summer" shutdown key. The heating is
switched off and DHW production is ensured.
KFitter settings access key
MSweep key

10 C 230 ECO 20/02/09 - 300015144-001-C
4.2.2 Control panel K3
Make all settings on the master boiler fitted with a DIEMATIC-m3
control panel
Press the *key.
Access to the parameters of the slave boilers (Panel K3) in a cascade
• Boiler temperature display on the master boiler
Number of the boiler for which the parameters are displayed
`Press the *key
The number of the boiler displayed corresponds to the setting
on the coding wheel.
• Boiler temperature display on the slave boiler
Number of the boiler for which the parameters are displayed
All parameters and measurements on the slave boilers (Control
Panel K3) can be accessed with the control panel keys DIEMATIC-
m3.
Key *is used to transmit all information from the slave boilers
(Control Panel K3) to the master boiler (DIEMATIC-m3 Control
Panel).
The parameters on the slave boilers can be read on the control panel
display DIEMATIC-m3.
If no keys are pressed for 10 seconds, the control panel display
returns to the master boiler (Number 1).
Adjustme
nt (Code
wheel)
Number of the boiler for which the parameters are
displayed
01
Master boiler (Control panel
DIEMATIC-m3)
12
”Follower - 1” boiler
(Control panel K3)
23
”Follower - 2” boiler
(Control panel K3)
etc.
024681012141618202224
A
BOILER TEMP.
024681012141618202224
A
BOILER TEMP.

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4.3 Stopping the boiler
- Cut the power supply to the boiler.
- Close the gas valve. Don't forget the risk of frost.
4.3.1 Precautions to take if there is a danger of frost
Heating circuit:
Use a correctly dosed antifreeze to prevent the heating water
freezing. If this cannot be done, drain the system completely. In all
cases, consult the fitter.
Domestic hot water circuit:
Drain the domestic water tank and pipes.
4.3.2 Precautions required in the case of long boiler stops (one or more years)
- Close the gas valve
- The boiler and the chimney must be swept carefully.
- Close the door of the boiler to prevent the internal circulation of air.
4.4 Commissioning the boiler
Initial commissioning must be done by a qualified
professional.
4.4.1 Commissioning
- Ensure that the boiler is switched off
- Remove the front casing
- Open the main gas valve
- Open the boiler control panel (Control panel instructions)
- Check the electrical connection
- Fill the installation with water and check hydraulic tightness (Pmin:
0.8 bar)
- Bleed the heating installation
- Fill the condensates siphon with water
- Check the connection of the combusted gas evacuation and the air
inlet
- Empty the gas inlet
- Open the gas valve on the gas pipe to the boiler
- Check the gas connection
- Turn the boiler on
- Turn the main switch to 8
- The boiler type is displayed on the screen for 5 seconds
- Provoke a heating request
- The boiler starts to operate
- Check the settings (See "Gas settings" - Installation and Service
Manual). If necessary, correct the settings
5 Checking and maintenance
The boiler is almost maintenance-free if it is set correctly. The boiler
only requires an annual check and cleaning if necessary.
Make the following checks at least 1 time a year:
- Checking the combustion in the boiler
- Setting the ignition electrode
- Checking tightness (hydraulics, combusted gas discharge and
gas)
- Checking the hydraulic pressure
Carry out the following maintenance at least 1 time a year:
- Clean the fan
- Clean the heat exchanger using the tool provided
- Clean the burner
- Clean the siphon.

12 C 230 ECO 20/02/09 - 300015144-001-C
6 Troubleshooting
6.1 Rating plate
D
XX-XX

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6.2 Messages - Faults
6.2.1 Messages
Message Code
no. Probable causes Action
SHOW REM. CTRL
The message SHOW REM.CTRL indicates
the presence of an override on a remote
control
To cancel the overrides on all remote controls, press the
AUTO key for 5 seconds
REVISION Boiler service required Contact the professional responsible for maintenance of the
boiler
BL.PSU ERROR 0Error parameters - Switch the boiler off and switch back on
- Set the boiler type parameter (See #CONFIGURATION)
BL.MAX BOILER 1Boiler temperature > 110 °C Wait 10 minutes for the temperature to come down
BL.MAX EXCHAN 3Heat exchanger temperature > 95 °C
- Wait 10 minutes for the temperature to come down
- Check the water flow
- Check that the installation and boiler are adequately filled
with water and correctly irrigated and bled
- Check: Heat exchanger fouled
BL.DERIVE EXCH 4The speed at which the exchanger
temperature is rising is too high
- Wait 10 minutes for the temperature to come down
- Check the water flow
- Check that the installation and boiler are adequately filled
with water and correctly irrigated and bled
- Check: Heat exchanger fouled
BL.DT EXC.BACK 5
The temperature difference between the
exchanger sensor and the return sensor is
too great (35 K)
- Wait 10 minutes for the temperature to come down
- Check the water flow
- Check that the installation and boiler are adequately filled
with water and correctly irrigated and bled
- Check: Heat exchanger fouled
BL.DT BOI.EXC. 6
The temperature difference between the
boiler sensor and the exchanger sensor is
too great
- Wait 10 minutes for the temperature to come down
- Check the water flow
- Check that the installation and boiler are adequately filled
with water and correctly irrigated and bled
- Check: Heat exchanger fouled
BL.RL OPEN 8The RL inlet on the PCU is open - Switch the boiler off and switch back on
- Set the boiler type parameter (See #CONFIGURATION)
BL.INV. L/N 9
- Phase and neutral inverted
- Mains electricity with floating or two-phase
neutral
- Respect the rating plate on the connection terminal block
- Set the boiler type parameter (See #CONFIGURATION)
BL.CS OPEN 11 The contact inlet CS is open Check the cause of the open contact CS
BL.COM PCU-M3 13 Communication breakdown between PCU
and DIEMATIC-m3 Check the link and the connectors
BL.GAS PRESS 15 Gas pressure too low
Check:
- Opening the gas valve on the boiler
- Gas supply pressure
- Correct installation of the pressure switch (Replace if
necessary)
BL.BAD SU 16 The SU is not compatible with the PCU - Switch the boiler off and switch back on
- SU: Change them
BL.PCU ERROR 17 Error parameters - Switch the boiler off and switch back on
- PCU: Change them

14 C 230 ECO 20/02/09 - 300015144-001-C
Messages are not memorised.
BL.BAD PSU 18 The PSU is not compatible with the PCU
- Switch the boiler off and switch back on
- PSU: Change them
- Set the boiler type parameter
BL. COM SU 21 Communication breakdown between PCU
and SU Check the installation of the SU on the PCU
BL.FLAME LOS 22 Flame lost
- Wait 10 seconds
- If, after 5 attempts, the error persists, BL.FLAME LOS
changes to I-CURRENT FAIL
Check:
- Opening the gas valve on the boiler
- Gas pressure
- Setting the gas valve unit
- Check the connection of the combusted gas evacuation
and the air inlet
- Checking the heat exchanger
BL.CCE TEST 24 The cyclical leak proofing kit (CCE) has
detected a problem
- Wait 10 seconds
- If, after 5 attempts, the error persists, BL.CCE TEST
changes to CCE TEST FAIL
Check:
- Opening the gas valve on the boiler
- Gas pressure
- Correct installation of the pressure switch handling the
CCE function (Replace if necessary)
- Gas valve (Replace if necessary)
- Wiring
BL.SU ERROR 25 SU: Internal error - Wait 10 seconds
- SU: Change them
BL.UNKNOWN 254 Blockage unknown - Switch the boiler off and switch back on
- SU: Change them
Message Code
no. Probable causes Action

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6.2.2 Faults
Faults Code no. Probable causes Action
BOILER S.FAIL.
32 The boiler sensor is short circuited - Reset the box
- Check the link and the connectors
- Replace the sensor if necessary
33 The boiler sensor is off
BACK S.FAILURE
6The return sensor is short circuited - Reset the box
- Check the link and the connectors
- Replace the sensor if necessary
7The return sensor is off
8The sensor reading is under -10°C
EXCHAN.S.FAIL.
2The exchanger sensor is short circuited - Reset the box
- Check the link and the connectors
- Replace the sensor if necessary
3The exchanger sensor is off
4The sensor reading is under -10°C
OUTSI. S.FAIL.
DHW S. FAILURE
AUX1.SENS.FAIL
AUX2.SENS.FAIL
UNIV.SENS.FAIL
OUTL S.A FAIL.
OUTL S.B FAIL.
OUTL S.C FAIL.
ROOM S.A FAIL.
ROOM S.B FAIL.
ROOM S.C FAIL.
SWIM.P.A S.FAIL
SWIM.P.B. S.FAIL
SWIM.P.C. S.FAIL
SOLAR S. FAIL
ST.TANK S.FAIL
DHW 2 S. FAIL
The corresponding sensor is off or short-
circuited.
Check the link and the connectors. Replace the sensor if
necessary.
See comments below.
BOILER 2 FAIL.
BOILER 3 FAIL.
BOILER 4 FAIL.
BOILER 5 FAIL.
BOILER 6 FAIL.
BOILER 7 FAIL.
BOILER 8 FAIL.
BOILER 9 FAIL.
BOILER 10 FAIL.
Error on a slave boiler, in a cascade
installation. Press key *to see the error.
TA-S SHORT-CIR The Titan Active System® is short-
circuited.
Check that the Titan Active System® is not short-
circuited.
TA-S DISCONNEC The Titan Active System® is on an open
circuit.
Check that the Titan Active System® is correctly
connected.

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TA-S FAILURE Internal problem.
- Switch off the current.
- Contact the professional responsible for maintenance of
the boiler.
PSU FAIL 0 PSU not connected or faulty
- Reset the box
- Check the link and the connectors
- PSU: Replace if necessary
PSU PARAM FAIL 1 Safety parameter errors
- Reset the box
- Check the link and the connectors
- PSU: Replace if necessary
STB EXCHANGE 5 Exchanger temperature too high
- Reset the box
- Check that the installation and boiler are adequately
filled with water and correctly irrigated and bled
- Check: Heat exchanger fouled
STB BACK 9 Return temperature too high
- Reset the box
- Check that the installation and boiler are adequately
filled with water and correctly irrigated and bled
- Check: Heat exchanger fouled
EXCH-BACK<MIN 10
- The temperature difference between the
exchanger sensor and the boiler flow
sensor is too little
- Sensor defective
- No flow rate or flow rate too low
- Sensor installed incorrectly
- Reset the box
- Check that the installation and boiler are adequately
filled with water and correctly irrigated and bled
Check:
- Heat exchanger fouled
- Sensor installed correctly
- Level differences on the temperature sensors
EXCH-BACK>MAX 11
- The temperature difference between the
exchanger sensor and the boiler flow
sensor is too great
- Sensor defective
- No flow rate or flow rate too low
- Sensor installed incorrectly
- Reset the box
- Check that the installation and boiler are adequately
filled with water and correctly irrigated and bled
Check:
- Heat exchanger fouled
- Sensor installed correctly
- Level differences on the temperature sensors
SMOKE.P.FAIL 12
- The flue gas pressure switch is open
- Bad connection
- The pressure in the combusted gases
evacuation duct is too high
- Reset the box
- Check the wiring
- Ensure that the siphon is not empty. Top up with more
water if necessary
- It is possible that the combustion products evacuation
pipe is totally or partially obstructed
- Check: Open flue damper
Faults Code no. Probable causes Action

17
20/02/09 - 300015144-001-C C 230 ECO
BURNER FAILURE 14
- No flame after 5 ignition attempts
- No ignition spark
- Reset the box
- Check the correct connection of the ignition cable and
that there is no breakdown or short circuit on the earth
Check:
- the gap between the electrodes (3 to 4 mm)
- Burner cover status (Burner / electrode cover closed)
- Faulty control by the SU board
- No flame after 5 ignition attempts
- No flame
- Reset the box
- First check that the gas valve is open, that the gas
supply pressure is present, that the gas conduit has
been sufficiently bled, that the air/flue gas conduit is not
blocked and is not leaking, that the siphon is full and not
blocked
- The gas valve unit must be set with precaution
- Gas block: Wiring OK
-
Faulty control by the SU board
- No flame after 5 ignition attempts
- Flame present (insufficient ionization)
Check the correct connection of the ignition cable and that
there is no breakdown or short circuit on the earth
Check:
- Check the electrode condition
- Opening the gas valve on the boiler
- Gas supply pressure
CCE TEST FAIL 15
- The cyclical leak proofing kit (CCE) has
detected a leak
- Reset the box
Check:
- Opening the gas valve on the boiler
- Gas supply pressure
- Replace the gas valve (If necessary)
PARASIT FLAME 16 Detection of a parasite flame
- Reset the box
Check:
- Ignition/ionization electrode
- Leak on the gas valve
- Gas inlet valve closed (Compulsory)
VALVE FAIL 17 Gas valve defective
- Reset the box
- Check the link and the connectors
- Check the gas valve and replace if necessary
FAN FAILURE 34 The fan is not running at the right speed
- Reset the box
Check:
- Cabling error
- Fan error
BACK>BOIL FAIL 35 The return temperature is higher than the
boiler temperature
- Reset the box
- Check the water circulation direction in the boiler
- Check that the boiler sensor and the return sensor have
not been reversed
I-CURRENT FAIL 36 The flame went out more than 5 times in 24
hours while the burner was operating
- Reset the box
Check:
- Gas supply pressure
- Pressure regulator
- Setting the gas valve unit
SU COM.FAIL 37 Communication breakdown between PCU
and SU
- Reset the box
- Check the installation of the SU on the PCU
PCU-M3 COM.FAIL 38 Communication breakdown between PCU
and DIEMATIC-m3
- Reset the box
- Check the link and the connectors
Faults Code no. Probable causes Action

18 C 230 ECO 20/02/09 - 300015144-001-C
CS OPEN FAIL 39 The contact inlet CS is open - Check the cause of the open contact CS
- Reset the box
FAIL. UNKNOWN 254 Fault unknown - Switch the boiler off and switch back on
- SU: Change them
PCU COM. FAIL Communication breakdown between
DIEMATIC-m3 and PCU
- Reset the box
- Check the link and the connectors
- Switch the boiler off and switch back on
5 RESET:ON/OFF 5 resets done in less than an hour - Switch the boiler off and switch back on. The current
error is displayed and can be reset
MC COM.FAIL
Communication error between DIEMATIC
M3 and the boiler module for the CDI radio
(CDR)
- Check the link between the DIEMATIC M3 and the boiler
module
Faults Code no. Probable causes Action

19
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The last ten failures are memorised in the paragraph #DEF.
HISTORY
ZSee: "Parameter and input/output check (mode tests) - Control
panel instructions
Comments
OUTSI. S.FAIL. The boiler operates on BOILER MAX temperature
- The valve setting is no longer ensured but monitoring the maximum
temperature of the circuit after the valve is ensured.
- Valves may be manually operated.
- Reheating the domestic hot water remains ensured.
DHW S. FAILURE The hot water storage tank reheating operation is no longer assured.
OUTL S.A FAIL., OUTL S.B FAIL. and OUTL S.C FAIL. The circuit concerned goes from automatic to manual mode: The pump
operates.
ROOM S.A FAIL., ROOM S.B FAIL. and ROOM S.C FAIL. The circuit concerned operates without any influence from the room sensor.
SWIM.P.A S.FAIL, SWIM.P.B. S.FAIL, SWIM.P.C. S.FAIL Pool reheating is independent of its temperature.
SOLAR S. FAIL Reheating domestic hot water using the solar panel is no longer ensured.
ST.TANK S.FAIL The hot water storage tank reheating operation is no longer assured.
TAS... Domestic hot water production is shut down and can be restarted using key
.
The tank is no longer protected.
Contact the professional responsible for maintenance of the
boiler.
A tank without Titan Active System® is connected to the boiler: Check
that the Titan Active System® simulation connector (delivered with
package AD212) is fitted to the sensor card."

20 C 230 ECO 20/02/09 - 300015144-001-C
6.3 Technical characteristics
C 230-... Unit 85 130 170 210
General
Numberofsections 3456
Burner operation Modulating
Useful output (80/60°C) PN (G20) minimumkW16222939
maximum kW 87 113(1)/120 166 200
Useful output (50/30°C) PN (G20) minimumkW18243344
maximum kW 93 121(1)/129 179 217
Burner output (PCI) (G20) minimumkW17233141
maximum kW 89 115(1)/123 170 205
Combustion gas and by-products
Gas supply pressure G20 mbar 17 - 30
Gas flow rate G20 (15 °C - 1013 mbar) minimum m3/h 1.8 2.4 3.3 4.3
maximum m3/h 9.4 12.2(1)/13 18 21.7
Gas flow rate G25 (15 °C - 1013 mbar) minimum m3/h 2.1 2.8 3.8 5.0
maximum m3/h 11 14.4 20.9 25.2
Gas flow rate G27 (15 °C - 1013 mbar) minimum m3/h 2.2 3.0 4.0 -
maximum m3/h 11.5 15.9 22.0 -
Gas flow rate G31 minimum Kg/h 1.94 1.94 3.42 3.19
maximum Kg/h 6.91 9.56 13.21 15.93
CO2(G20-G25) Qmin.-Qmax (Open air box) % 9.3-8.8 9.3-8.8 9.3-8.8 9.3-8.8
CO2(G20-G25) Qmin.-Qmax (Closed air box) % 9.5-9.0 9.5-9.0 9.5-9.0 9.5-9.0
CO2(G27) Qmin.-Qmax (Open air box) % 9.3-8.8 9.3-8.8 9.3-8.8 -
CO2(G27) Qmin.-Qmax (Closed air box) % 9.5-9.0 9.5-9.0 9.5-9.0 -
CO2(G31) Qmin.-Qmax (Open air box) % 10.5-9.8 10.5-9.8 10.5-9.8 10.5-9.8
CO2(G31) Qmin.-Qmax (Closed air box) % 10.7-10.0 10.7-10.0 10.7-10.0 10.7-10.0
Average nitrogen oxide emission (NOx) mg/kWh 62 54 49 58
Average CO emission mg/kWh 19 15 16 19
Maximum pressure at the flue gas nozzle Pa 130 130 130 130
Combusted gas flow (2)
minimum Kg/h 27.2 36.7 49.5 65.5
maximum Kg/h 149.7 193.5(1)/
206.9 286.0 344.9
Classification of type according to the discharge of
combusted gases and air supply B23, B23P, C13, C33, C43, C53, C63, C83
Heating
Safety temperature °C 110
Water setting range °C 20 - 90
Water pressure minimum bar 0,8
maximum bar 6
Water content l 12 16 20 24
Water resistance at ∆T = 10K mbar 660 540 680 720
Water resistance at ∆T = 20K mbar 165 135 170 180
Electricity characteristics
Power supply voltage V/Hz 230 / 50