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Commander Ductable Make-Up Air Heater
www.lbwhite.com
Owner’s Manual •
Commander Ductable Make-Up Air Heater
26
Turn on power and gas. Close
thermostat contacts.
No
Check transformer,
thermostat, and wiring. Repair
or replace as needed.
Ignition Module
LED light?
No
24/120Vac
between 24V/120V(LINE) and
GND(24V)/120V(NEUT) terminals
respectively?
Yes
Replace
Ignition Module
Yes
Ignition Module LED
blinks green?
Yes
LED blinks
2, 3,or 7 quick red
flashes, then
pause?
Yes
Check
Line
Voltage
Sparking during
trial for ignition?
Check wiring to spark electrode. Check
spark gap for proper gap. Replace module
if necessary.
No
No
Pilot/
Main burner light
properly during trial
for ignition?
Yes
Yes
No
Power
between PV and
GND(PV) or MV and
GND(MV) terminals
during trial for
ignition?
Gas at Pilot/
Main burner?
Adjust burner flame size or position,
adjust spark electrode or flame
sense probe position, or replace
main burner.
Yes
No
Replace
Ignition Module
No
Adjust flame size or electrode/
probe position
Replace
Ignition Module
Yes
Check shutoff valves
are on. Check wiring
to pilot/main valve.
Check tubing is
clear. If all OK,
replace main valve.
After burner
is lit, does valve
turn off and start
new cycle?
Flame
in contact with
spark electrode
or sense
probe?
No
No
Remote
flame sense?
Yes
Check wiring to SENSE terminal
If OK, replace ignition module
Yes
No
Replace
Ignition Module
Yes
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Burner
grounded to GND
(BURNER)?
Assure burner is
properly grounded.
No
LED blinks
5 quick red
flashes, then
pause?
Yes
No
Check wiring to rollout switch.
Check rollout switch for
malfunction. Replace if
necessary.
Replace
Ignition Module
LED blinks
6 quick red
flashes, then
pause?
Yes
No
LED blinks
3 quick red
flashes, then
pause?
Replace
Ignition Module
Yes
No
Ignition Module LED
solid green?
No
Delay up to 30 sec
for false flame test
Yes
Check wiring to APS switch.
Check APS switch for
malfunction. Replace if
necessary.
Ignition Module LED
solid red?
No
Yes
No
Yes
LED blinks
4 quick red flashes
then pause?
No
Yes