Page 9
BCS3000M-9
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
High stack temperature.
Open thermocouple.
FUEL SELECTOR
in
center position.
Observe the display EXCEED and
OUT indicators on the HIGH TEMP
LIMIT instrument. “OPEN” indicates
an open thermocouple. Press the
RESET key on the instrument to reset
the high limit contact.
Verify that either
OIL
or
GAS
fuel is
selected
Flame meter indicates
presence of flame when
burner is shut off.
Fire in dryer drum.
Poor flame meter
connection.
Defective scanner.
Check for fire in drum.
Check flame meter connections.
Unplug 3TR relay. If signal disappears
replace pilot scanner. If signal remains
replace main flame scanner.
Flame relay
ALARM
led
indicator comes on and
will not reset.
Improper grounding or
voltage polarity.
Flame relay failure.
Verify neutral (L2) of 120Vac supply is
grounded. Verify that control panel is
grounded.
Replace flame relay amplifier and/or
relay module.
indication but
fuel control motor will not
drive.
Fuse 5 blown.
Pilot timer failure
Control motor failure
Controller failure
Check fuse 5 and replace if necessary.
Verify 3TR relay is energized and that
the
CONTROL MODE
switch is not in
the
LOW FIRE
position
Verify 120Vac between motor
terminals L1 and L2.
Remove fuse 5 then jumper 32 to
ground or 33 to ground in the burner
junction box to test motor operation.
Move
CONTROL MODE
switch to
MANUAL
position.
