Amana AVZC20 Series User Manual

SERVICING
65
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.
b5
• Circulator blower
motor fails to start 10 consecutive times.
MTR
LCKD
ROTOR
b5
• Obstruction in circulator
blower housing.
• Seized circulator blower
motor bearings.
• Failed circulator blower
motor.
• Check circulator blower for
obstructions. Remove and repair/replace wheel/motor if necessary.
• Check circulator blower
motor shaft rotation and motor. Replace motor if necessary.
• Turn power OFF prior
to repair
• Replace motor with
correct replacement part.
• Replace wheel 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.
b6
• Circulator blower
motor shuts down for over or under voltage condition.
• Circulator blower
motor shuts down due to over temperature condition on power module.
MOTOR
VOLTS
b6
• High AC line voltage to air
handler blower.
• Low AC line voltage to air
hander blower.
• High ambient temperatures.
• Check power to air handler
blower. Verify line voltage to blower is within the range specified on the air handler blower rating plate.
• 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.
b7
• Circulator blower
motor does not have enough information to operate properly. Motor fails to start 40 consecutive times.
MOTOR
PARAMS
b7
• Error with integrated control
module.
• Motor has a locked rotor
condition.
• Check integrated control
module. Verify control is populated with correct shared data set. See data errors above for details.
• Check for locked rotor
condition (see error code above for details).
• Turn power OFF prior
to repair.
• Replace with correct
replacement part(s).
• Use memory card for
the specific model.
• Insert memory card
BEFORE turning power ON.
• Memory card may be
removed after data is loaded
• Turn power off before
removing memory card.
• Air handler blower operates at
reduced performance or operates on low stage when high stage is expected.
• Integrated control module LED
display provides indicated error code.
b9
• Airflow is lower than
demanded.
LOW ID
AIRFLOW
b9
• Blocked filters. • Restrictive ductwork. • Undersized ductwork.
• 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.
• Turn power OFF prior
to repair.

Amana AVZC20 Series Specifications

General

Brand	Amana
Model	AVZC20 Series
Category	Heat Pump
Language	English