Daikin E Series User Manual

SiAU18-715 Troubleshooting for SkyAir Indoor Unit
Troubleshooting 343
5.10 Malfunction of Suction Air Thermistor
Remote
Controller
Display
C9
Applicable
Models
FFQ, FCQ, FBQ, FHQ
Method of
Malfunction
Detection
Malfunction detection is carried out by temperature detected by suction air temperature sensor.
Malfunction
Decision
Conditions
When the suction air temperature sensor’s thermistor becomes disconnected or shorted while
the unit is running.
Supposed
Causes

Failure of the sensor itself

Broken or disconnected wire

Failure of indoor unit PCB

Failure of connector contact
Troubleshooting
Check No.02
Refer to P.349
Connect correctly.
Suction air temperature
sensor replacement.
If contact is OK,
replace outdoor unit
PCB.
NO
NO
YES
YES
(Q0540)
Disconnect the sunction air
temperature sensor (R1T) from
X19A on the indoor unit PCB
and measure the resistance.
Is the
thermistor normal?
(See note)
Is it normal?
Check contact of connector
+See Check No. 02 for “Thermistor temperature and resistance characteristics”.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.

Daikin E Series Specifications

General

Brand	Daikin
Model	E Series
Category	Air Conditioner
Language	English