MXS Service Manual

Troubleshooting for SA Indoor Unit SiUS121736EA
165 Service Diagnosis
6.3 Indoor Fan Motor or Related Abnormality
6.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality
Applicable
Models
FDMQ09/12/15/18/24RVJU
Error Code A6
Method of Error
Detection
 Detection from the current flow on the fan PCB
 Detection from the rotation speed of the fan motor in operation
Error Decision
Conditions
The rotation speed is less than a certain level for 6 seconds.
Supposed
Causes
 Clogged foreign matter
 Disconnection of fan motor connectors
 Disconnection of the connector between the indoor unit PCB and the fan PCB
 Defective fan PCB
 Defective fan motor
 No fuse continuity
Troubleshooting
Check No.02
Refer to P.210
Connect the connector
correctly.
Turn OFF the power supply
and wait for 10 minutes.
NO
Turn ON the power supply while
the fan motor connector (∗1) is
disconnected.
YES
NO
Connect the connector
correctly.
NO
YES
YES
Replace the fuse.
There is a
continuity in the fuse
(∗2) on the fan PCB or fan
motor harness.
NO
The fan motor
connector (∗1) is
connected to the fan
PCB.
Remove the foreign matter.
YES
There is a foreign
matter around the fan.
The connector
between the indoor unit
control PCB and the fan
PCB is connected.
A
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
(R25083)