SiUS281811EA Troubleshooting by Error Codes
Part 6 Service Diagnosis 233
4.15 Blower Motor Stops for Over/Under Voltage
Error Code A8
Applicable
Models
FTQ-TA
Outline The indoor unit periodically receives control status information from the fan motor.
Error is issued when the information shows abnormality.
Error Decision
Conditions
If the information shows Over/Under Voltage status, it will be deemed a MOTOR VOLTS abnormal
operation.
Error Reset
Conditions
If the information is normal, the error will be cleared.
Supposed
Causes
High AC line voltage to indoor blower motor
Low AC line voltage to indoor blower motor
Incorrect wiring
Corrective
Actions
Verify line voltage to indoor blower motor is within the range specified on the ID blower rating
plate.
Check power to indoor blower motor.
Check wiring.
Replace motor.