Baxi Luna Duo-Tec Operating instructions

LUNA DUO-TEC
Troubleshooting

WARNING!
THIS DOCUMENT IS INTENDED ONLY AS AN
EDUCATIONAL TOOL
This Troubleshooting Guide, and the instructions and suggestions
within are intended solely as an educational tool assisting
completely qualified Gas Appliance Mechanics who have
successfully completed the Baxi Installation Certification Program.
Use of the information herein for the purposes of onsite appliance
correction by untrained personnel may cause extremely
dangerous conditions, and may void the manufacturer’s warranty.
Baxi N.A. assumes absolutely no liability in the execution of the
training suggestions in this document. Should you experience
problems or complications beyond your realm of training, please
contact Baxi N.A. for further instructions.

BAXI LUNA DUO-TEC TROUBLESHOOTING GUIDE
1
Version 1
Table of Contents
Section
Page
Controller
2
Access
i
n
g
P
r
m
e
t
e
r
s
3
D
e
s
c
r
i
p
t
i
o
n
o
f
P
r
m
e
t
e
r
4
E
r
r
o
r
C
o
d
e
H
i
s
t
o
r
y
6
E
r
r
o
r
C
o
d
e
s
8
M
u
l
t
i
Z
o
n
e
R
e
l
y
C
r
d
C
o
n
n
e
c
t
i
o
n
n
d
O
p
t
i
o
n
s
1
7
P
C
B
R
e
p
l
c
e
m
e
n
t
(
without
e
s
y
k
e
y
s
e
r
v
i
c
e
M
e
m
o
r
y
s
t
i
c
k
)
1
8
P
C
B
R
e
p
l
c
e
m
e
n
t
(
w
i
t
h
e
s
y
k
e
y
s
e
r
v
i
c
e
)
1
9
C
o
m
b
u
s
t
i
o
n
A
d
j
u
s
t
m
e
n
t
F
u
n
c
t
i
on
(
3
0
4
)
2
1
M nu l C
ontrol F
unction (301)
2
1
D
e
-
e
r
t
i
o
n
F
u
n
c
t
i
o
n
(
3
1
2
)
2
2
R
e
p
l
c
e
me
nt
P
r
t
s
2
2
P
r
e
s
s
u
r
e
T
b
l
e
2
3

BAXI LUNA DUO-TEC TROUBLESHOOTING GUIDE
2
Version 1
CONTROLLER
SYMBOLS
Boiler Off – Heating and DHW
disabled
Boiler frost protection is active)
Burner on
Ignition Fault Domestic hot water mode
enabled
Boiler/system water pressure low Central Heating mode enabled
Error call for service Programming menu
Resettable fault Boiler information menu
Fault in progress Units of measure
BUTTONS
DHW temperature adjustment
(+ to incre se the temper ture nd – to decre se it)
CH temperature adjustment
(+ to incre se the temper ture nd – to decre se it)
Boiler operating information
Boiler Operating mode:
DHW only – DHW & He ting – He ting only
Off – Reset – Exit menu/functions

BAXI LUNA DUO-TEC TROUBLESHOOTING GUIDE
3
Version 1
ACCESSING PARAMETERS
1) Press both the nd buttons fro 6 seconds, the displ y shows “P01”
ltern ting with its v lue 0);
2) Press either or buttons to scroll the p r meters list;
3) Press the button to edit the selected p r meter;
4) Press either or buttons to modify the p r meter v lue ;
5) Press the button to s ve the p r meter v lue, or press the button to exit the
function without s ving.
In the def ult condition it is possible to scroll through the p r meters until P42. If you need
to set some p r meters fter P42 proceed s follows:
-Press either or buttons until P22 is re ched;
-Press the button to edit the selected p r meter;
-Set P22 to 22;
-Press the button to s ve the p r meter v lue;
-Press either or button to scroll through the p r meters from P42 to P76

BAXI LUNA DUO-TEC TROUBLESHOOTING GUIDE
4
Version 1
DESCRIPTION OF PARAMETERS
LUNA DUO-TEC
FACTORY SETTINGS
1.33 GA 40 GA
P01
-------
00
P02
Gas used
N tur l G s = 00
Prop ne = 01
00
P03
Hydraulic system
00 = inst nt neous ppli nce
03 = inst nt neous ppli nce with pre-he t function
05 = ppli nce with extern l stor ge boiler
08 = he ting only ppli nce
13 = inst nt neous ppli nce with pre-he t function
for sol r pplic tion
08 00
P04
Programmable relay 1 setting optional):
00 = no function is ssoci ted
01 = close cont ct with room thermost t request
02 = close cont ct with remote control request
03 = rel y for Low w ter in the system lerts
04 = rel y for Error code lerts
05 = rel y for kitchen f n function
07 = rel y for post circul tion pump
09 = DHW rel y on with DHW progr m setting
10 = DHW rel y on with DHW request; if P64 = 1
rel y on with CH nd DHW request
13 = rel y for Cooling function
14 = close cont ct with room thermost t request
with post circul tion
15 = close cont ct with remote control request
with post circul tion
02
P05
Programmable relay 2 setting optional):
(The s me configur tions s Rel y 1-P04) 04
P06
..P09
Manufacturer information
--
P10
Heating se
t
point setting OT / RT
Open Therm / Room Thermostat 120V~)
00= with Remote Control (RC) connected, the
temper ture request is the RC set point
01= The temper ture Request is the highest set
point between RC nd PCB
02 = The temper ture request is the RU set point.
The RT en ble the g s boiler oper tes
00
P11..P12
Manufacturer information
--
P13
Max. heating output 0
-
100%)
100
77
P14
DHW max. output 0
-
100%)
100
P1
5
Min. heating output 0
-
100%)
00

BAXI LUNA DUO-TEC TROUBLESHOOTING GUIDE
5
Version 1
P16
Maximum CH setpoint °C)
00 = 176°F / 80°C - 01 = 113°F / 45°C 00
P17
Pump overrun t
ime in heating mode
(01-240 minutes) 03
P18
Burner ignition
pause time
in CH mode
(00-10 minutes) - 00=10 seconds 03
P19
Manufacturer information
07
P20
Pump overrun time in DHW mode seconds)
30
P21
Anti
-
legionellosis function
00 = Dis bled
01 = En bled
00
P22
Manufacturer information
(set “22” to displ y p r meters P71 nd P72) 00
P23
Maximum DHW setpoint temperature
(113°-140°F /45°-60°C) 49
P24
Manufacturer information
35
P25
No water safety device
00
P26..P31
Manufacturer information
--
P32..P41
Diagnostics See SERVICE Instructions
--
P44
Temperature unit setting
00 = °C
01 = °F
01
P71 *
Maximum fan speed
--
P72 *
Minimum fan speed
--
* See T bles on SECTION 12.4
NOTE : to displ y p r meters P71 nd P72 it is necess ry to set before the p r meter P22 = 22

6
Version 1
BAXI LUNA DUO-TEC TROUBLESHOOTING GUIDE
ERROR CODE HISTORY
The B xi Lun Duo Tec PCB is ble to store the l st 10 errors th t h ve occurred. The PCB is
progr mmed with counter which counts consecutive errors of the s me error code.
In order to view the error code history scroll to COO fter P31 s described in the Accessing
P r meters
C00
Errors without
reset
1 – Error stor ge number (C00 is the l st error to occur)
2 – Error code
3 – Consecutive error code counter of the s me error
4 – Number of d ys p st since the error (00= tod y)
5 – System st tus
6 – System ph se
7 – Centr l he ting temper ture t the time of the error in °C
C01
C02
C03
C04
C05
C06
C07 Errors with
reset
C08
C09
SYSTEM STATUS
01 St nd by
02 DHW request
03 Controller stop function
04 CH request
05 Prehe t function
06 CH frost protection function ctive
07 DHW frost protection function ctive
08 Post-circul tion pump ctive
09 Overhe ting circul tion pump function ctive
SYSTEM PHASE
00 St nd by
01 Pre-purge function ctive
03 Ignition lo d purge between the first nd second ttempt
04 Ignition lo d first ttempt
05 Oper tion ctive
06 Lock out
08 Second ignition lo d ttempt
11 Ignition lo d purge between the second nd third ttempt
14 Third ignition lo d ttempt
15 Post- purge function
16 Overhe t post-purge function ctive

BAXI LUNA DUO-TEC TROUBLESHOOTING GUIDE
7
Version 1
Parameters
Error
storage
number
Error code
Consecutive
error code
counter of
the same
error
Number of
days pasted
since the
error
00= today)
System
status
System
phase
Central
heating
temperature
at the time
of the error
in °C
Errors with
out reset
P32 C00
P33 C01
P34 C02
P35 C03
P36 C04
P37 C05
P38 C06
Errors with
reset
P39 C07
P40 C08
P41 C09

BAXI LUNA DUO-TEC TROUBLESHOOTING GUIDE
8
Version 1
Error
Code Error Solution
09 G s v lve connection f ult.
-
Check connection t the g s v lve nd PCB
-If both connections re good repl ce PCB
Notes:
10 Outdoor sensor f ult.
-
Disconnect the outdoor temper ture sensor nd T
ke n
ohm re ding
refer to
NTC sensor
ch
rt
-Check the wiring to the outdoor temper ture sensor looking for bre k or short in the wire
-If the outdoor temper ture sensor nd wiring re good repl ce the PCB
Notes:
15 G s v lve comm nd f ult. -Check the wiring h rness connection t the g s v lve nd PCB
-If wiring h rness is good, repl ce PCB
Notes:
20 Centr l He ting NTC sensor
f ult.
-
T ke n Ohm re ding of the CH NTC supply sensor
refer to ch rt. The sensor should re d within +
/
-
10% of the st ted ohms on the NTC sensor ch rt, if out of c libr tion repl ce sensor.
- If the sensor is good, check the wiring h rness for loose or broken wires
- If the sensor nd wiring re good repl ce the PCB
Notes:
28 Flue NTC he t exch nger
sensor f ult
-
Check wiring h rness connections t the flue h
igh
limit
nd control bo rd for loose connection
-Check wiring h rness for short
Note: