Weil-McLain GOLD CGa Installation And Maintenance Manual page 52

GOLD
11c
Troubleshooting
The information on this page and pages 53 through 59
apply only to spark-ignited pilot CGa boilers. These
boilers are equipped with an ignition control module
that has indicator lights to show control status. Charts
through
based on indicator light conditions.
Make sure
diagram. Good grounding is extremely important for
proper operation.
Solder or water
board can cause improper operation of control module.
Place a shield over the boiler internal controls and
components during installation. Failure to comply could
result in severe personal injury, death or substantial
property damage.
Figure 29 CGa Ignition control module
59346
52
CGa Gas-Fired Water Boiler
, pages 54-59, help you identify problems
7
is installed per wiring
ground wiring
splatter between plugs and circuit
— spark-ignited pilot boilers
Control indicator lights —
lockout modes
See through
Charts 2
2
detailed troubleshooting procedures.
To reset control after a lockout, turn off power at the
120 VAC service switch or turn down all thermostats.
Wait 45 seconds. Then restore power or call for heat.
POWER light flashing alone
Usually indicates reversed polarity of 120 VAC power
wires.
POWER and
Usually indicates stray voltage on external thermostat
circuit wires (usually due to miswired 3-wire zone valve).
POWER and
Usually indicates vent damper failed to open within
5 minutes.
POWER and
Usually indicates false flame sense or flame sensed when
it shouldn't be there.
Control indicator lights —
non-lockout modes
light flashing alone
FLAME
Usually indicates pilot flame was not established within
15 seconds from application of spark. Control will flash
light, but will continue to cycle indefinitely until flame
is established or problem is corrected.
DAMPER light flashing alone
Usually indicates damper opened during run cycle.
Boiler will not lockout, but won't heat unless problem
is corrected.
Troubleshooting the control
module
See
Figure 30
receptacles and plugs on the control module.
, pages 54-59 in this section, for
7
TSTAT CIRC lights flashing
DAMPER lights flashing
FLAME lights flashing
, page 53, for location of harness plug
Part Number 550-110-593/1099