68
1.
Check gas, water and electrical supplies are available at
the boiler.
2.
Electrical supply = 120V ~ 60 Hz.
3.
Preferred minimum gas pressure is 7" H
2
O (17.4 mbar) for
Natural gas and 11" H
2
O (27.4) mbar for LPG.
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.
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,
E
321 indicate
possible faulty components.
E
53 shows possible obstruction in the flue duct.
E
55 indicates PCB is not setting/calibrated.
E
71,
E
72,
E
77,
E
78 e
E
92 indicate possible wrong
calibration. A new calibration is needed.
E
92 shows possible flue recirculation in the flue duct.
E
83…87 shows possible error of communication with Room
units (Go to section P)
E
110 shows overheat of the primary.
E
117 is displayed when the primary water pressure is more
than 2.7 bar.
E
118 is displayed when the primary water pressure is less
than 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
PN 240012369, REV A [08/31/2018]
13 - TROUBLE SHOOTING
Содержание GMHB227
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