Malfunction Of Suction Air Thermistor - Daikin E-Series Service Manual
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- Service manual (453 pages) ,
- Technical manual (73 pages) ,
- Installation manual (29 pages)
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SiENBE18-621
5.10 Malfunction of Suction Air Thermistor
C9
Remote Control
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
" Failure of the sensor itself
Supposed
" Broken or disconnected wire
Causes
" Failure of indoor unit PCB
" Failure of connector contact
Troubleshooting
Check No.02
Refer to P.299
Troubleshooting
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 heat exchange
sensor (R3T) from X17A on
the indoor unit PC board and
measure the resistance.
Is the
thermistor normal?
(See note)
YES
HSee
Check No. 02
for "Thermistor temperature and resistance characteristics".
Troubleshooting for SkyAir Indoor Unit
NO
NO
Connect correctly.
Heat exchanger
sensor replacement.
If contact is OK,
replace indoor unit
PCB.
(Q0417)
293
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Troubleshooting
