Amana AVZC20 Series User Manual

SERVICING
64
INDOOR UNIT ERROR CODES
Symptoms of Abnormal Operation
(Legacy & ComfortNet™
Thermostat)
7-Segment LED
Codes
Characters
Will Alternate
Fault Description
ComfortNet™
Thermostat Only
Possible Causes Corrective Actions Notes & Cautions
Message Code
• Air handler blower fails to operate. • Integrated control module LED
display provides indicated error code.
• ComfortNet™ thermostat “Call for
Service” icon illuminated.
• ComfortNet™ thermostat scrolls
“Check Air Handler” message.
b0
• Circulator blower
motor is not running when it should be running.
MOTOR
NOT RUN
b0
• Loose wiring connection at
circulator motor power leads or circulator motor power leads disconnected.
• Failed circulator blower
motor.
• Tighten or correct wiring
connection.
• Check circulator blower
motor. Replace if necessary.
• Turn power OFF prior
to repair
• Replace circulator
motor with correct replacement part.
• Air handler blower fails to operate. • Integrated control module LED
display provides indicated error code.
• ComfortNet™ thermostat “Call for
Service” icon illuminated.
• ComfortNet™ thermostat scrolls
“Check Air Handler” message.
b1
• Integrated control
module has lost communications with circulator blower motor.
MOTOR
COMM
b1
• Loose wiring connection at
circulator motor control leads.
• Failed circulator blower
motor.
• Failed integrated control
module.
• Tighten or correct wiring
connection.
• Check circulator blower
motor. Replace if necessary.
• Check integrated control
module. Replace if necessary.
• Turn power OFF prior
to repair
• Replace circulator
motor with correct replacement part.
• Replace integrated
control module with correct replacement part.
• Air handler blower fails to operate. • Integrated control module LED
display provides indicated error code.
• ComfortNet™ thermostat “Call for
Service” icon illuminated.
• ComfortNet™ thermostat scrolls
“Check Air Handler” message.
b2
• Circulator blower
motor horse power in shared data set does not match circulator blower motor horse power.
MOTOR
MISMATCH
b2
• Incorrect circulator blower
motor in air handler blower.
• Incorrect shared data set in
integrated control module.
• Verify circulator blower
motor horse power is the same specified for the specific air handler blower model. Replace is necessary.
• Verify shared data set is
correct for the specific model. Re-populate data using correct memory card if required.
• Turn power OFF prior
to repair
• Replace motor with
correct replacement part.
• Use memory card for
the specific model
• Insert memory card
BEFORE turning power ON. Memory card may be removed after data is loaded.
• Error code will be
cleared once shared data and motor horse power match.
• Turn power off before
removing memory card
• Air handler blower operates at
reduced performance.
• Airflow delivered is less than
expected.
• Integrated control module LED
display provides b3 error code.
b3
• Circulator blower
motor is operating in a power, temperature, or speed limiting condition.
MOTOR
LIMITS
b3
• Blocked filters. • Restrictive ductwork. • Undersized ductwork. • High ambient temperatures.
• Check filters for blockage.
Clean filters 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 "Installation
Instructions" for installation requirements.
• Turn power OFF prior
to repair.
• Air handler blower fails to operate. • Integrated control module LED
display provides indicated error code.
• ComfortNet™ thermostat “Call for
Service” icon illuminated.
• ComfortNet™ thermostat scrolls
“Check Air Handler” message.
b4
• Circulator blower
motor senses a loss rotor control.
• Circulator blower
motor senses high current.
MOTOR
TRIPS
b4
• Abnormal motor loading,
sudden change in speed or torque, sudden blockage of air handler blower/coil air inlet or outlet.
• High loading conditions,
blocked filters, very restrictive ductwork, blockage of air handler blower/coil air inlet or outlet.
• Check filters, filter
grills/registers, duct system, and air handler blower/coil air inlet/outlet for blockages.
• Turn power OFF prior
to repair.

Amana AVZC20 Series Specifications

General

Brand	Amana
Model	AVZC20 Series
Category	Heat Pump
Language	English