Amana xMVC96 series Installation Instructions Manual page 51

T
ROUBLESHOOTING
Symptoms of Abnormal
Diagnostic/
Operation (Legacy
Status LED
& ComfortNet™
Codes
Thermostat)
• Operation different than
expected or no operation.
• Integrated control
module LED display
provides d4 error code.
• ComfortNet™ thermostat
"Call for Service" icon
illuminated.
• ComfortNet™ thermostat
scrolls "Check Furnace"
message.
• Furnace fails to operate.
• Integrated control
module LED display
provides b0 error code.
• ComfortNet™ thermostat
"Call for Service" icon
illuminated.
• ComfortNet™ thermostat
scrolls "Check Furnace"
message.
• Furnace fails to operate.
• Integrated control
module LED display
provides b1 error code.
• ComfortNet™ thermostat
"Call for Service" icon
illuminated.
• ComfortNet™ thermostat
scrolls "Check Furnace"
message.
• Furnace fails to operate.
• Integrated control
module LED display
provides b2 error code.
• ComfortNet™ thermostat
"Call for Service" icon
illuminated.
• ComfortNet™ thermostat
scrolls "Check Furnace"
message.
• Furnace operates at
reduced performance.
• Airfow delivered is less
than expected.
• Integrated control
module LED display
provides b3 error code.
C
HART
ComfortNet™
Thermostat Only
Fault Description
Message
d4 • Invalid memory INVALID MC
card data. DA TA
b0 • Circulator blower MOTOR NOT
motor is not
running when it
should be running.
b1 • Integrated control MOTOR
module has lost COMM
communications
with circulator
blower motor.
b2 • Circulator blower MOTOR
motor horse MISMATCH
power in shared
data set does not
match circulator
blower motor
horse power.
b3 • Circulator blower MOTOR
motor is operating LIMITS
in a power,
temperature, or
speed limiting
condition.
Possible Causes
Code
d4 • Shared data set on
memory card has been
rejected by integrated
control module
b0 • Loose wiring connection
RUN at circulator motor
power leads or
circulator motor power
leads disconnected.
• Open circuit in inductor
or loose wiring
connection at inductor
(3/4 Hp and 1 Hp
models only).
• Failed circulator blower
motor.
b1 • Loose wiring connection
at circulator motor
control leads.
• Failed circulator blower
motor.
• Failed integrated control
module.
b2 • Incorrect circulator
blower motor in furnace.
• Incorrect shared data
set in integrated control
module.
b3 • Blocked flters.
• Restrictive ductwork.
• Undersized ductwork.
• High ambient
temperatures.
51
Corrective Actions Notes & Cautions
• Verify shared data set is • Turn power OFF prior
correct for the specifc to repair
model. Re-populate data
• Use memory card for
using correct memory
the specifc model.
card if required.
• Insert memory card
BEFORE turning
power ON. Memory
card may be removed
after data is loaded
and power is turned
off.
• Error code will be
cleared once data is
loaded and power is
turned off.
• Tighten or correct wiring • Turn power OFF prior
connection. to repair
• Verify continuous • Replace inductor with
circuit through inductor. correct replacement
Replace if open or short part.
circuit.
• Replace circulator
• Check circulator blower motor with correct
motor. Replace if replacement part.
necessary.
• Tighten or correct wiring • Turn power OFF prior
connection. to repair
• Check circulator blower • Replace circulator
motor. Replace if motor with correct
necessary. replacement part.
• Check integrated control • Replace integrated
module. Replace if control module with
necessary. correct replacement
part.
• Verify circulator blower if • Turn power OFF prior
motor horse power is the to repair
same specifed for the
• Replace motor with
specifc furnace model.
correct replacement
Replace if necessary.
part.
• Verify shared data set is
• Use memory card for
correct for the specifc
the specifc model
model. Re-populate data
• Insert memory card
using correct memory
BEFORE turning
card if required.
power ON. Memory
card may be removed
after data is loaded
and power is turned
off.
• Error code will be
cleared once shared
data and motor horse
power match.
• Check flters for • Turn power OFF prior
blockage. Clean flters to repair.
or remove obstruction.
• Check ductwork for
blockage. Remove
obstruction. Verify all
registers are fully open.
• Verify ductwork is
appropriately sized for
system. Resize/replace
ductwork if necessary.
• See "III. Product
Description" and "IV .
Location Requirements
& Considerations"
furnace installation
requirements.