Dunkirk Q90-200 Series II User Manual
Page 35
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System Status
Indicator lights track operating sequence. If system locks out, lights indicate point in sequence of operation were lockout
occurs. Refer to following pages for detailed troubleshooting procedures.
LIGHT
STATUS
INDICATES
POWER
ON
IBC is energized through 24 volt transformer.
OFF
IBC is not energized.
Blinking
IBC receives more than 40 VAC.
PURGE
ON
IBC is energizing draft inducer and air flow is proven.
OFF
Off during purge cycle - draft inducer is not powered on or air flow is not proven.
Off during igniter and run cycle - normal operation, purge cycle complete.
Blinking
IBC is locked out. Problem could indicate false positive proof of air flow. Blocked vent,
intake air pipe, flue way, or orifice in negative pressure hose.
IGNITER
ON
IBC is energizing igniter.
OFF
Igniter is not energized.
VALVE
ON
IBC is energizing gas control valve to open.
OFF
Gas control valve is closed.
Blinking
IBC is locked out. Problem is flame has not been proven in three (3) ignition attempts.
May be due to broken igniter or lack of/low flame signal, or no gas.
FLAME
On Bright
Flame proven.
On Dim
Checking for flame signal (during trial for ignition)
OFF
Flame unproven.
13 - SEQUENCE OF OPERATION DIAGNOSTICS