Unit Maintenance; Troubleshooting - Nordyne B6VM Series Installation Instructions Manual

uNIt MAINtENANcE

Proper maintenance is most important to achieve the best
performance from a air handler. Some of the components
and their locations are shown in
any component of the air handler must be replaced, use
only factory authorized replacement parts specified in the
Replacement Parts List provided online.
WARNING:
ELEctRIcAL SHocK, FIRE oR
EXPLoSIoN HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing,disconnect all electrical power
to the indoor blower.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
• These maintenance instructions are primarily intended
to assist qualified technicians experienced in the proper
maintenance and operation of this appliance.
• Always reinstall the doors on the air handler after servicing
or cleaning/changing the filters. Do not operate the air
handler without all doors and covers in place.
• Verify that the thermostat is properly installed and is
not being affected by drafts or heat from lamps or other
appliances.
• To achieve the best performance and minimize equipment
failure, it is recommended that a yearly maintenance
checkup be performed. At a minimum, this check should
include the following items:
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.
14
Figure 12 (page 16). If
cABINEt SIZE
A
B
C
table 2.
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.

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
Control Fault (No Power)
Normal Operation
FIXED
SPEED
Motor Fault
FuRNAcES
Twin Fault (no motor fault)
Communications Fault
Control Fault (No Power)
VARIABLE
Normal Operation
SPEED
Motor Fault
FuRNAcES
Communications Fault
Motor control Board Fault conditions
table 4.
FILtER SIZE
12 x 20 x 1
18 x 20 x 1
20 x 20 x 1
Filter Sizes
to determine fault condition.
DIAGNoStIc
Control Fault (No Power)
Blower Fault
Normal Operation
GREEN RED
LED LED
Off Off
On On
On Flash
Flash On
Flash Flash
Off Off
On On
On Flash
Flash Flash