Troubleshooting - Maytag B6BM series Installation Instructions Manual

cABINEt SIZE
A
B
C
table 2.
Air Filter(s) - B6 Series Air Handlers are not supplied
with a single air filter when shipped from the factory. It
is recommended that the filter be cleaned or replaced
every 4 to 6 months at a minimum. Newly built or recently
renovated homes may require more frequent changing until
the construction dust has minimized. Filter sizes shown in
Table 2 are available at most local retailers.
wARNING:
Never operate the air handler without a filter in
place. Dust and lint in the return air can build
up on internal components, resulting in loss of
efficiency, equipment damage, and possible fire.
Filters designed to remove smaller particles such as pollen,
may require additional maintenance.
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.
16
FILtER SIZE
12 x 20 x 1
18 x 20 x 1
20 x 20 x 1
Filter Sizes

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 LED on both control boards constantly ON? If not,
refer to Table 3 or Table 4
RED LED (AN2)
OFF
Flash
ON
Air handler control Board Fault conditions
table 3.
DIAGNoStIc
C F
ontrol ault
n o
FIXED ormal Peration
SPEED
m F
otor ault
FuRNAcES
t F (
win ault no motor Fault
C
ommuniCations
C F
ontrol ault
VARIABLE
n o
ormal Peration
SPEED
m F
otor ault
FuRNAcES
C
ommuniCations
table 4. Motor control Board Fault conditions
to determine fault condition.
DIAGNoStIc
Control Fault (No Power)
Blower Fault
Normal Operation
GREEN
LED
(n P ) Off
o ower
On
On
) Flash
F Flash
ault
(n P ) Off
o ower
On
On
F Flash
ault
RED
LED
Off
On
Flash
On
Flash
Off
On
Flash
Flash