VOKERA Synergy 29 Installation & Servising Instruction - page 29
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7.7
ELECTRICAL CHECKS
Any electrical checks must be carried out by a
suitably qualified person.
7.7.1
EARTH CONTINUITY TEST
Isolate the appliance from the electrical supply,
and using a suitable multi-meter carry out a
resistance test. Connect test leads between an
appliance earth point and the earth wire of the
appliance supply cable. The resistance should
be less than 1 OHM. If the resistance is greater
than 1 OHM check all earth wires and connectors
for continuity and integrity.
7.7.2
SHORT CIRCUIT CHECK
Isolate the appliance from the electrical supply,
and using a suitable multi-meter, carry out a short
circuit test between the Live & Neutral
connections at the appliance terminal strip
(fig.16). Repeat above test on the Live & Earth
connections at the appliance terminal strip
(fig.16).
NOTE
Should it be found that the fuse has failed but no
fault is indicated, a detailed continuity.
Check will be required to trace the fault. A visual
inspection of components may also assist in
locating the fault.
7.7.3
POLARITY CHECK
With the appliance connected to the electrical
supply and using a suitable multimeter, carry out
the following voltage tests:
●
connect test leads between the Live & Neutral
connections at the appliance terminal strip
(fig.16). The meter should read approximately
230V ac. If so proceed to next stage. If not,
see 7.7.4.
●
connect test leads between the Live & Earth
connections at the appliance terminal strip
(fig.16). The meter should read approximately
230V ac. If so proceed to next stage. If not,
see 7.7.4.
●
connect test leads between the Neutral & Earth
connections at the appliance terminal strip
(fig.16). The meter should read approximately
0 - 15Vac. If so polarity is correct. If not, see
7.7.4.
7.7.4
REVERSED POLARITY OR SUPPLY FAULT
Repeat the above tests at the appliance isolator,
if testing reveals correct polarity and/or supply at
the isolator, re-check wiring and connections
between the isolator and the appliance.
If tests on the isolator also reveal reversed polarity
or a supply fault, consult the local electricity
supplier for advice.
7.7.5
RESISTANCE TO EARTH CHECK
Isolate the appliance from the electrical supply,
and using a suitable multi-meter carry out a
resistance test. Connect test leads between the
Live & Earth connections at the appliance
terminal strip (fig.16). If the meter reads other
than infinity there is a fault that must be isolated,
carry out a detailed continuity check to identify
the location of the fault.
FAULT CODE 01
Fault code 01 appears when the burner has failed to ignite,
or the flame supervision system has failed to detect a flame.
●
Check incoming gas supply
●
Check spark electrode
●
Check polarity
●
Check integrity of flue system
●
Check gas valve
●
Check ignition control PCB
FAULT CODE 02
Fault code 02 appears if the boiler has overheated.
●
Check high limit thermostat
●
Check thermistors
●
Check pump
●
Check gas pressures
FAULT CODE 03
Fault code 03 appears if the boiler or flue system has devel-
oped a fault.
●
Check operation of fan
●
Check flue venturi
●
Check analogue pressure switch
●
Check flue system
IMPORTANT
These series of checks must be carried out before
attempting any faultfinding procedures on the
appliance. On completion of any task that
required the disconnection and re-connection of
any electrical wiring or component, these checks
must be repeated.
7.8
FAULT FINDING
Before attempting any faultfinding, the electrical
checks as detailed in 7.7 must be carried out.
Isolate the appliance from the electrical supply.
Disconnect any external controls from terminals
TA & Spare of the appliance terminal strip, and
make safe. Insert a solid link-wire between
terminals 3 & 4.
Ensure jumper tags are fitted to the main PCB at:
●
JP5
●
JP7
●
JP8 (Nat. Gas only)
●
M7
Restore the electrical supply to the boiler and
turn the selector switch to the on position. The
boiler should now function as described in section
7.2. Should the boiler fail to respond, the internal
fuses and connectors should be checked to
ensure integrity and continuity. If the boiler still
fails to respond, refer to the detailed faultfinding
flowcharts overleaf.
7.9
FAULT CODES
When the boiler displays a fault code, the
appropriate code is shown on the display,
accompanied by a flashing red LED. To reset the
boiler, slowly turn the mode selector switch to
the reset position then back to the on position. If
the boiler does not reset, refer to the following
section and the detailed faultfinding flowcharts
overleaf.