ACV MCBA User manual

16
MCBA FOR SPECIALISTS:
INSTALLER, SERVICE ENGINEER
SAFETY STOP (ERROR MODE)
If a fault occurs while the appliance is running, the system locks and
the screen starts to flash. The first character is an E and the next two
characters give the code for this fault, as illustratedin the table below.
Table of error codes and how to resolve them
To unlock the system:
• Press RESET on the screen.
• Contact your installer if the fault happens again.
Codes Description of the fault Resolution of the fault
Abnormal flame signal - Check the wiring (short-circuit in the 24V wiring)
- Check the electrode/ replace the MCBA (water damage).
No flame signal after five attempts at firing the boiler
- Check the ignition cable, the electrode and the
position of the electrode.
- Check that there is gas at the burner.
Persistent lock - Press RESET
EPROM error -If the problem persists after two RESET attempts,
replace the MCBA.
Max input, thermostat open or 24V fuse gone. - Check the wiring and check the
24V fuse on the MCBA.
Internal error - If the problem persists after two RESET attempts,
replace the MCBA.
T1 > 110°C - Check the NTC wiring and replace if necessary.
T2 > 110°C - Check the NTC wiring and replace if necessary.
T1 gradient too high - Check that the pump is turning. If there is
no problem with the pump, drain the system.
No fan signal present
- If the fan is working:
• Check the fan control connection and the fan wiring
• if the problem persists after 2 RESET attempts, replace the
fan
• if the problem persists, replace the MCBA.
- If the fan is not working:
• Check that the fan 230V connection. If the problem persists,
replace the fan.
NTC 1 short-circuit - Check the connection and the NTC1 wiring
If the problem persists, replace the NTC1.
NTC 2 short-circuit - Check the connection and the NTC2 wiring
If the problem persists, replace the NTC2.
NTC 3 short-circuit - Check the connection and the NTC3 wiring
If the problem persists, replace the NTC3.
NTC 1 connection open - Check the connection and the NTC1 wiring
If the problem persists, replace the NTC1.
NTC 2 connection open - Check the connection and the NTC2 wiring
If the problem persists, replace the NTC2.
NTC 3 connection open - Check the connection and the NTC3 wiring
If the problem persists, replace the NTC3.
Internal error - If the problem persists after two RESET attempts,
replace the MCBA.
Error while reading the parameters Press RESET. If the error persists, replace the MCBA.
Problem with the power supply to the fan Check the MCBA power supply voltage. If it is OK, replace
the fan.
To

17
MCBA FOR SPECIALISTS:
INSTALLER, SERVICE ENGINEER
SETTING THE PARAMETERS
Parameter mode
To access Parameter mode when the system is in Pilot mode, press MODE once.
To scroll through the list of parameters, simply press “step”. To modify a parameter value, use the +or -keys.
Then press “Store” to save the value you just changed. The screen flashes once to confirm the data has been saved.
To activate the parameters you changed, press “Mode” once more (which brings you into Info mode). However, if you do not press a key, the
system returns to Pilot mode after 20 minutes and automatically enables the changes.
MODE
Adjusting the hot water temperature
STEP
STEP
STEP
STEP
Minimum central heating temperature when using an outdoor sensor
STEP
Minimum outdoor temperature
(adjust the heating curve)
STEP
Maximum outdoor temperature
(adjust the heating curve)
STEP
Frost protection temperature
STEP
Correction based on the outdoor temperature
STEP
Blockage T 0 = Disabled
90
01
01
90
60
0
20
- 15
00
00
STEP
Key Display Description of parameters Factory setting
Key Screen Description of parameters Factory setting
Key Display
Parameters for the specialist: only accessible by using the Code
Booster 00 = Stop (minute)
STEP
00
Production
of hot water
00 = Stop
01 = Start
02 = Stop + pump continuously on
03 = Start + pump continuously on
Turn on/Turn off
the heating
00 = Stop
01 = Start
02 = Stop + pump continuously on
03 = Start + pump continuously on
Maximum temperature in Central Heating mode

18
MCBA FOR SPECIALISTS:
INSTALLER, SERVICE ENGINEER
Night-time heating temperature reduction (°C)
STEP
Fan speed in heating mode (rpm x 100)
STEP
10
52
Key Display Description of the parameters Factory setting
Max. fan speed in heating mode (rpm x 100)
STEP
00
Max fan speed in hot water mode (rpm x 100)
STEP
57
Max. fan speed in hot water mode (rpm x 100)
STEP
00
Min. fan speed (rpm x 100)
STEP
15
Min. fan speed (rpm x 100)
STEP
00
Fan speed at ignition (rpm x 100)
STEP
37
Heating pump time delay 0 = 10 sec (minute) 00
STEP
Hot water pump time delay 10.2 = 10 sec (minute) 16
00
01
01
03
STEP
Burner interlock hysteresis (heating)
STEP
Burner trigger hysteresis (heating)
STEP
Burner interlock hysteresis (hot water)
STEP
Burner trigger hysteresis (hot water)
STEP
04Hot water mode interlock hysteresis
STEP
Hot water mode trigger hysteresis
STEP
01

19
MCBA FOR SPECIALISTS:
INSTALLER, SERVICE ENGINEER
Heating lock time (sec x 10.2)
STEP
Hot water lock time (sec x 10.2)
STEP
Lock time to switch from hot water mode to heating mode
(sec x 10.2)
STEP
Difference T1 - T2 for modulation
STEP
BUS address (-1 = disabled)
STEP
Increase the primary temperature value to generate hot
water (relative to the hot water temperature)
STEP
1st digit: heating circuit (AM3-11 – 4-way valve)
0 = disabled 5 = enabled
2nd digit: the demand for heat comes from:
0 = room thermostat
STEP
00
00
00
05
- 01
05
00
Key Display Description of the parameters Factory setting
1st digit: Hot water circulator pump (= 1)
2nd digit: tank with NTC3 sensor (= 2)
STEP
Manual fan speed (- 01 = modulation)
12
- 01
11
00
60
30
01
00
STEP
1st digit: PWM pump operating speed
2nd digit: PWM pump speed during time-delay
STEP
Holding temperature
STEP
Maximum temperature for the heating circuit outlet
(AM3-11 – 4-way valve)
STEP
Minimum temperature for the heating circuit outlet
(AM3-11 – 4-way valve)
STEP
Hysteresis of the heating circuit outlet temperature
(AM3-11 – 4-way valve)
STEP
1st digit: Special pump (0 = disabled)
2nd digit: Minimum disable cycle (0 = disabled)
STEP

20
MCBA FOR SPECIALISTS:
INSTALLER, SERVICE ENGINEER
INFORMATION ON THE INSTALLATION
Info mode
To switch from Pilot mode to Info mode, press “Mode” twice.
ENTERING THE CODE
Code mode
You can access the following parameters by entering the service
code:
• Parameters 5 - 42
• Communication mode
• Fan Speed mode
• ERROR mode
MODE
MODE
Start temperature T1 in °C
STEP
Return temperature T2 in °C
STEP
Hot water temperature T3 in °C
STEP
Outdoor temperature T4 in °C
STEP
Not used
STEP
Start temperature calculated in °C
STEP
Rate of increase in the start
temperature in °C/s
STEP
Rate of increase in the return
temperature in °C/s
STEP
Rate of increase in the hot water
temperature in °C/s
STEP
Heating circuit outlet temperature
(AM3-11 – 4-way valve)
STEP
Press “STEP” until the system displays the information you need.
The point located behind the first position flashes to indicate that
the boiler is in “INFO” mode.
Key Display Description of parameters
Key Display
STEP
STORE
MODE STEP
+or -
Press “STEP” once and the system displays “C”
in position 1, followed by arbitrary
characters in positions 3 and 4.
Press “STORE”, the screen flashes
briefly to indicate that the code has been accepted.
Press “MODE” until
the system displays the correct mode.
Press “+” or “-” to change the code.
Only ACX authorised installers know the access code.
For further information, please contact our after-sales
department.
To access Code mode, press
MODE and STEP simultaneously
(only from Pilot mode!).

21
MCBA FOR SPECIALISTS:
INSTALLER, SERVICE ENGINEER
COMMUNICATION MODE (WITH CODE)
When in this mode, the system displays the communication between
the boiler and the control module, the optional interface kit or the
optional programmable room thermostat.
FAN MODE (WITH CODE)
ERROR MODE (WITH CODE)
“ERROR” mode indicates the most recent error, as well as the
status of the boiler and its readings at the time this error occurred.
Fan speed
MODE
The current fan speed is 5,500 rpm.
STEP
Key Display Description of parameters
MODE
Code mode
(See the table on page 16 for a full list)
STEP
Status of the boiler at the time of the
error (See the table on page 16)
STEP
Start temperature T1 at the time of
the error
MODE
Return temperature T2 at the time of
the error
STEP
Hot water temperature T3 at the time
of the error
STEP
Outdoor temperature T4 at the time of
the error
STEP
Key Display
Key Display Description of parameters
MODE
No communication
Communication between the boiler
module and the optional control
modules only (RMCI)
STEP
Communication between all the
devices connected
Key Display
Key Display Description of parameters
Temp. °C R ΩTemp. °C R Ω
-20 98200 40 6650
-15 75900 45 5520
-10 58800 50 4610
-5 45900 55 3860
0 36100 60 3250
5 28600 65 2750
10 22800 70 2340
15 18300 75 1940
20 14700 80 1710
25 12000 85 1470
30 9800 90 1260
35 8050 95 1100
100 950
Temperature sensor resistance tables

22
SPARE PARTS
No. Jackets Codes HeatMaster®201
A01 Right side 21471415
A02 Left side 21471415
A03 Right side rear corner 21478415
A04 Left side rear corner 21473415
A05 Rear panel 21474415
A06 Right side front corner 21472415
A07 Left front side 21479415
A08 Upper front panel 2147A415
A09 Lower front panel 2147B415
A10 Burner cover 21476415
A11 Rear top cover 21475415
A12 Front top cover 21475416
A13 Rear half-base 2147S415
A14 Unequipped control panel 21477416
A15 Body + accessories (package No. 1) 27300047
No. Accessories
B01 Low-water-level pressure switch 557D3011
B02 Wilo circulator pump 557A4007
B03 3 bar / Ø 3/4” - 1” safety valve 557A1048
B04 Burner chamber insulating cover 51700041
B05 8-l expansion vessel 55301200
B06 Steam trap, Ø 1/2” 557A3001
B07 Drain cock, Ø 3/4” 557A1000
B08 Fill set, Ø 1/2” 55426018
B09 Type A, high-level turbulators 507F2009
B10 Type B, low-level turbulators 507F2010
No. Setting and electrical accessories
C01 MCBA 537D8016
C02 Transformer 547D3021
C03 NTC Duplo (NTC1 - NTC2) 5476G002
C04 NTC Single (NTC3) 5476G003
C05 Module AM3-11 10800080
C06 Module AM3-2 10800060
C07 Full control panel 24614133
C08 Display 537D3020
C09 Display case 537D3023
C10 Pressure gauge-thermometer 54441008
C11 ON/OFF switch 54766016
C12 Summer/Winter switch 54766017
C13 Control panel self-adhesive 617G0105
No. Burner
D01 Full burner 237D0118
D02 Fan 537D3034
D03 Venturi 537D4042
D04 110 x 3.5mm O-ring 557A0045
D05 Plate fan seal 557A0040
D06 Burner chamber plate seal 557A0020
D07 Ø 98mm burner tube + NIT 537DZ019
D08 Chamber plate sealing cord 51700025
D09 Ignition electrode 537DZ020
D10 Ignition cable 25760046
D11 Burner chamber plate insulating stone 51700040
D12 Burner chamber plate 2147P416
D13 Gas valve 537D4041
D14 Valve flange 537D8021

23
SERVICE RECORD
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Model:
Serial number:
Heating system pressure setting:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
INSTALLATION DETAILS
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
SERVICE NOTES
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:

24
SERVICE RECORD
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:
Service date:
% CO2(min. load):
% CO2(max. load):
Gas
Propane
Comments:
❏
❏Name and signature:
Flue gas T°:
Efficiency:
Gas pressure:

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