Troubleshooting for Duct Concealed/Ceiling Cassette Type SiUS122226E
178 Part 6 Service Diagnosis
6.7 Presence Sensor or Floor Sensor Abnormality
Applicable
Models
FFQ09/12/15/18W2VJU9
Error Code CE
Method of Error
Detection
The system detects abnormality by the output signal from the sensor(s).
Error Decision
Conditions
The sensor is disconnected or shorted while the unit is running.
Supposed
Causes
Disconnection of connector
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.
When replacing the defective sensor(s), replace the sensor kit as ASSY.
(R24577)
YES
NO
Check the connection of
connectors on the sensor kit.
YES
NO
Caution
Correct the connection.
Connect the connectors
properly.
Normal?
Normal?
Turn off the power. Then, turn on
the power to restart the system.
YES
NO
Normal
Replace the sensor kit.
CE error
displayed again?
Check the connection of
connector X81A on indoor unit
PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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