Daikin REYQ-AATJA, Service Manual, Page: 311 / 495

SiUS372201EA Troubleshooting by Error Code
Part 6 Service Diagnosis 304
Reference
3.11 Indoor Fan Motor Status Abnormality
Applicable
Models
FXTQ-TA
Error Code
A6-20
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 Power Limit or Temp Limit status, it will be deemed a MOTOR LIMIT
abnormal operation. (The system can keep operating.)
If the information shows Motor Lost Control or Current Trip status, it will be deemed a MOTOR
TRIP abnormal operation. (The system stops operating.)
Error Reset
Conditions If the indoor unit stops receiving abnormal information, the error will be cleared.
Supposed
Causes  Fan or motor obstruction
 Blocked filters
 Power interruption (low voltage)

Incorrect wiring
 Blockage in the airflow (ductwork) or ductwork undersized
 High loading conditions
Corrective
Actions  Check for obstruction on the fan, motor, or ductwork.
 Clean filters.
 Check filters, grille, duct system, heat exchanger air inlet/outlet for blockages.

Verify the input voltage at the motor.
 Check wiring.
 Replace motor.
CHECK 19 Refer to page 447.