12
tRoUBLESHootING
If the air handler fails to operate, check the following:
• Is the electric turned on?
• Is the thermostat operating properly?
• Are the blower compartment door(s) in place?
• Is the air handler disconnect closed?
• has the circuit breaker tripped or the control board fuse
burned open?
• Are any manual reset switches open?
• Is the filter dirty or plugged?
• Is the red LED on the air handler control board constantly
to determine fault condition.
• Is the green and red LED on the motor control board
constantly on? If not, use
condition.
RED LED
DIAGNoStIc
OFF
C
OntrOl
F
Ault
(n
O
P
Ower
)
F
lAsh
B
lOwer
F
Ault
On
n
OrmAl
O
PerAtiOn
table 3. Air handler control Board Fault conditions
Blower compartment
Dirt and lint can create excessive loads on the motor
resulting in higher than normal operating temperatures
and shortened service life. It is recommended that the
blower compartment be cleaned of dirt or lint that may
have accumulated in the compartment or on the blower
and motor as part of the annual inspection.
Blower Fan Wheel
Inspect the blower wheel blades for accumulations of dirt
and clean if necessary. Inspect mounting nut for tightness
when done.
Blower motor & Assembly
Inspect the blower assembly and motor mounting
brackets for tightness and corrosion. Correct deficiencies
if necessary. The blower motor contains sealed bearings
and under normal operating conditions, no maintenance
is necessary for the life of the equipment.
table 4. motor control Board Fault conditions
DIAGNoStIc
GREEN
LED
RED
LED
FIXED
SpEED
UNItS
C
OntrOl
F
Ault
(n
O
P
Ower
)
O
FF
O
FF
n
OrmAl
O
PerAtiOn
O
n
O
n
m
OtOr
F
Ault
O
n
F
lAsh
t
win
F
Ault
(
nO
mOtOr
FAult
)
F
lAsh
O
n
C
OmmuniCAtiOns
F
Ault
F
lAsh
F
lAsh
Motor
Mount Kit
Blower
Motor
Transformer
Capacitor
Circuit
Breaker (60A)
Heating Element
Assembly
Blower
Wheel
Blower
Housing
Control
Board
Filter
Door
Upper Door
Assembly
Lower Door
Assembly
Figure 7. B6BV Series Air Handler components
Summary of Contents for B6BV Series
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