86
13 - TROUBLE SHOOTING
1.
Check gas, water and electrical supplies are available at
the boiler.
2.
Electrical supply = 120V ~ 60 Hz.
3.
See Section 7.1 for nominal gas pressure ranges.
4.
Carry out electrical system checks, i.e. Grounding,
Resistance to Earth, Short Circuit and Polarity with a
suitable meter.
NOTE:
These checks must be repeated after any servicing or
fault finding.
5.
Ensure all external controls are calling for heat and check
all external and internal fuses. Before any servicing or
replacement of parts, ensure gas and electrical supplies
are isolated.
Example of Fault Listings
:
1.
If fault occurs on the boiler an error code may be shown
by the display.
E
20,
E
28,
E
40,
E
50,
E
160, indicate possible faulty
components.
E
53 shows possible obstruction in the flue duct.
E
110 shows overheat of the primary.
E
117 is displayed when the primary water pressure is more
than 43 psig (2.7 bar).
E
118 is displayed when the primary water pressure is less
than 7.5 psig (0.5 bar).
E
125 is displayed in either of two situations:-
a. If within a time between 15..30 seconds of the burner
lighting the boiler temperature has not changed by 1°C.
b. If within 10 minutes of the burner lighting the boiler
temperature twice exceeds the selected temperature
by 30°C. In these instances poor primary circulation is
indicated.
E
128 is displayed if there has been a flame failure during
normal burner operation.
E
133 ,
E
134 and
E
135 indicate the gas supply has been
interrupted, ignition has failed or flame has not been detected.
2.
By pressing the 'Reset' button for between 1-3 seconds
when
E
110,
E
125,
E
133,
E
134,
E
135 ,
E
09,
E
15,
E
128 and
E
384 are displayed it is possible to
relight the boiler.
3. If this does not have any effect, or error codes are
displayed regularly further investigation is required.
13.1 Initial Fault Finding Checks
13.2 Error Diagnostics
The PCB allows the display to list errors accrued in the boiler.
PCB has a counter which increases itself only if the anomaly is
consecutive repetition. Non consecutive errors do not increase
the counter.
To display all information for each error scroll through the
parameter list until P32 parameter. See Section 10.3 for
scrolling instructions.
Parameters from P32 to P38 (C00 to C06) are referred to
errors which do not need to be reset (e.g. DHW sensor fault);
Parameters from P39 to P41 (C07 to C09) are referred to
errors which require reset (e.g. safety thermostat).
PCB has another counter which displays how long ago the
error occurred. The range of this counter is from 0 (the day in
which the error occurred) to 99 (up to 3 months).
E.g. 45 indicates the error occurred 45 days before.
The history of errors of each parameter (
Pxx
-see the error
table) are displayed in the following order:
• Error number (C00 is the latest error)
• Error code
• Consecutive counter for the same error
• Number of days elapsed from the error event
• System Status
• Phase Status
•
CH flow temperature value during the error event
See the following table for error codes:
The
system status
is the operating mode before the error.
00
Stand-by
01
DHW request
02
Controller stop function active
03
CH request
04
Preheat function active
05
CH frost protection function active
06
DHW frost protection function active
07
Post-circulation pump active
08
Overheating circulation pump function active
PN 240012363 REV. A [08/31/2018]
