Presence Sensor Or Floor Sensor Abnormality - Daikin 4MXL-T Series Service Manual

Troubleshooting for SA Indoor Unit
6.7

Presence Sensor or Floor Sensor Abnormality

Applicable
FFQ09/12/15/18Q2VJU
Models
CE
Error Code
Method of Error The system detects abnormality by the output signal from the sensor(s).
Detection
Error Decision
The sensor is disconnected or shorted while the unit is running.
Conditions
Supposed
 Disconnection of connector
Causes  Breaking of wires
 Defective sensor(s)
 Defective sensor kit PCB
Troubleshooting
If the cause of the problem is related to the sensors, the sensors should be checked prior to
changing the indoor unit PCB.
Note
When replacing the defective sensor(s), replace the sensor kit as ASSY.
188
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the connection of
connector X81A on indoor unit
PCB.
Normal?
YES
Check the connection of
connectors on the sensor kit.
Normal?
YES
Turn off the power. Then, turn on
the power to restart the system.
CE error
displayed again?
YES
NO
NO
NO
SiUS121827E
Correct the connection.
Connect the connectors
properly.
Normal
Replace the sensor kit.
(R24577)
Part 6 Service Diagnosis