- 50
-
INST
ALLA
TION
Visualization on display
meaning
Flue gas sensor - open circuit
Fault 46
The flue gas probe detected a temperature
outside the allowed range (probe circuit open)
Water pressure switch
Fault 47
The water pressure switch is not connected or is faulty
Gas Pressure
Fault 76
Gas Pressure Low (pressure switch circuit open)
Trap fault
Fault 77
The trap probe detects an excessive pressure
Fault 80
Ret. temp. > Flow temp.
Fault 81
Sensor temperature difference test in progress.
A negative outcome will generate Fault 15.
Functional cHecKs - adJustment aFteR Gas cHanGe
For the gas change procedure see the relevant section on page 56.
To carry out functional checks and/or adjustment after a gas change,
proceed as follows:
- Enable the MANUAL TEsT function and press the
A
key to
increase output to 100% (see section “MANUAL TEsT FUNCTION” on
page 57). This brings the thermal unit to work at its maximum Gas
Flow Rate.
- The display will show the fan rpm at maximum heat input. Check
that this value corresponds to the one indicated in the "TECHNiCAL
sPECiFiCATiONs" table.
- Measure the gas flow rate taking into account the corrective factors
(if any).
- Measure CO2 and CO values with the aid of an analyser.
The opening for drawing the flue gas samples to be tested must be
on the straight section of the flue gas system duct, located at least
2 diameters away from the device outlet (refer to the Prevailing
standards).
Compare the measured values with the values given in the table
below, taking into account a ± 5% tolerance.
descRiPtion
maui KR 115-280
115
150
200
240
280
Max. gas consumption
G20
11.96
15.87
21.16
24.87
29.10
m
3
/h
G31
8.78
11.66
15.54
18.26
21.37
kg/h
Min. gas consumption
G20
2.22
3.17
3.76
4.50
5.24
m
3
/h
G31
1.63
2.33
2.76
3.30
3.85
kg/h
Max/min CO
2
(average values)
G20
9.3/9.1
%
Max/min CO
2
(average values)
G31
10.6/10.3
%
CO
25
30
35
30
28
ppm
2D
D
Fault 82
The body probe is in short circuit or detected a body temperature outside of
the allowed range (probe short circuit)
Fault 83
The body probe is interrupted or detected a temperature outside of the
allowed range (probe circuit open)
Fault 84
Body high temperature (T body > T flow+10°C)
Fault 89
Programming incongruence (e.g., Max<Min)
Fault 91
Cascade probe short circuit
Fault 92
Cascade probe circuit open
Fault 93
External probe short circuit
Fault 94
Display board fault
Fault 95
Cascade probe generic fault
Fault 96
External probe circuit open
Fault 97
Wrong cascade matching
Fault 98
Boiler Bus connection fault
Fault 99
Internal boiler bus fault