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main power switch "OFF" and then "ON" after the control
sensed fault has been corrected.
5.6.3
DIAGNOSTIC STATUS INDICATION
The ignition module has an LED that indicates the status of
the ignition safety circuits. The flashing operation of this
LED indicates the diagnostic status of the ignition control
module. The following listing gives the flashing diagnostic
status codes as signaled by the ignition module.
Table 11: Diagnostic Fault Table
CODE
•
System OK – no faults present
LED
constant on
•
Possible control fault – check
LED off
power or no call for heat.
•
Ignition lockout
3 flashes
•
Internal fault replace control
6 flashes
5.6.4
FLAME SENSE TEST
Figure 21: Ignition Module Flame Sense Test
Using a µA meter the flame signal can be measured with
the appliance running. The ignition modules requires
minimum 2.0 µA D.C. If the signal is less than this it could
indicate oxide on the metal rod, a partial ground through the
ceramic insulator or an improperly placed sensor. If oxide is
evident on the sensing rod use steel wool to remove it. Do
not use emery paper since the silica will foul the sensor
surface.
CONDITION
PART 6
CONTROL PANEL
6.1
APPLIANCE TEMPERATURE
CONTROLLER
The appliance is provided with a control panel at the front.
Operating controls are installed inside the control box and
are accessible by undoing the thumb screw and swinging
opening the door. The diagnostic information centre as well
as the on/off switch, 24V fuse, and the appliance
temperature controls reside on the control box door the
ignition control module, VFD, transformer and relays are
mounted on the internal panel.
Figure 22: Control Panel Front
Figure 23: Control Panel Components
The Boiler Temperature Controller (BTC 1) for this
appliance is a Camus 78-0017 Modulating SmartFlame
control. It initiates the local call for heat and sets the target
return (appliance inlet) water temperature. This controller
offers eight modes of operation which provides set point as
well as reset control. It provides the following:
•
Readings of inlet and outlet water temperatures as well
as ∆T temperature rise.
•
Eight pre-set modes of operation; mode 1 for heating
and constant circulation DHW, modes 2, 4, and 5 for
heating , mode 3 for DHW with remote sensing and
mode 6, 7 and 8 for operation by a remote controller.
•
Operation as an auto reset limit.
24
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