Weil-McLain Gold CGi Series 2 User Manual page 53

Boiler Manual
continued
CHART 5 — PRESS SWITCH light flashing and POWER light on steady
— May also be caused by wind gusts in excess of 31 mph for non-direct vent sidewall-vented boilers —
Electrical shock hazard — Wherever you see
instructions could result in severe personal injury, death or substantial property damage.
• Reset boiler control by turning off power at service switch or turning down thermostat for at least 45 seconds.
• Thermostat should call for heat and appropriate zone valves open.
• Remove INDUCER plug (Figure 38, Item 6 , page 48 )
from plug receptacle of control module.
• Place voltmeter leads across the 120 VAC N and
120 VAC H pins of the INDUCER receptacle (left
column center and right column bottom pins).
Does the voltmeter indicate 120 VAC ?
No
• Remove one of the wires connected to the pressure
switch.
• Check continuity across the switch terminals.
Does the ohmmeter indicate the switch is closed?
No
• Inspect and check wire
harness from control
module to pressure switch.
• Reseat connector in control
module receptacle.
• If harness is intact and
properly seated, but
problem persists, replace
control module.
• Retest.
Part Number 550-110-710/0200
— Usually indicates pressure switch opened during run cycle —
Does blower motor operate?
No
Yes
• Replace inducer
assembly.
• Retest.
Yes
• Check air pressure switch per manual Section
11b.
• Replace if necessary. Retest.
▲TURN OFF
POWER▲, follow the instructions. Failure to follow
• Wait 5 minutes.
Is
PRESS SWITCH
No
• Boiler should be in
normal operating
sequence.
• Observe operation
until thermostat is
satisfied and inducer
has completed its
post-purge cycle.
No
Yes
light flashing?
Yes
Is vent blocked?
Yes
• Clear vent and recycle boiler.
• Recheck boiler operation.
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