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Troubleshooting for SkyAir Indoor Unit
5.10 Malfunction of Suction Air Thermistor
C9
Remote
Controller
Display
Applicable
FFQ-B, FHQ-BU
Models
Method of
Malfunction detection is carried out by temperature detected by suction air temperature sensor.
Malfunction
Detection
Malfunction
When the suction air temperature sensor's thermistor becomes disconnected or shorted while
Decision
the unit is running.
Conditions
Supposed
Causes
Troubleshooting
Check No.02
Refer to P.286
280
Failure of the sensor itself
Broken or disconnected wire
Failure of indoor unit PCB
Failure of connector contact
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check contact of connector
Is it normal?
YES
Disconnect the sunction air
temperature sensor (R1T)
from X19A on the indoor unit
PCB and measure the
resistance.
Is the
thermistor normal?
(See note)
YES
HSee
Check No. 02
for "Thermistor temperature and resistance characteristics".
NO
NO
SiEBE18-526
Connect correctly.
Suction air temperature
sensor replacement.
If contact is OK, replace
outdoor unit PCB.
(Q0418)
Troubleshooting
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Troubleshooting
