Abnormal Discharge Pipe Temperature - Daikin E-Series Service Manual

Troubleshooting for Outdoor Unit
7.7

Abnormal Discharge Pipe Temperature

F3
Remote Control
Display
Applicable
AII outdoor unit models
Models
Method of Abnormality is detected according to the temperature detected by the discharge pipe
Malfunction temperature sensor.
Detection
Malfunction
When the discharge pipe temperature rises to an abnormally high level
Decision When the discharge pipe temperature rises suddenly
Conditions
" Faulty discharge pipe temperature sensor
Supposed
" Faulty connection of discharge pipe temperature sensor
Causes
" Faulty outdoor unit PCB
Troubleshooting
∗ Refer to "Thermistor Resistance / Temperature Characteristics" table on P355.
316
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Discharge
pipe temperature is
120°C or higher when the
unit stop by
malfunction.
NO
Pull out the discharge pipe
thermistor from the outdoor
PCB, and then make
measurement of resistance
using a multiple meter.
Are
the characteristics
of the discharge pipe
thermistor normal?
(3.5~400KW)
*
YES
YES
NO
SiENBE18-621
Refrigerant shortage, compression
defect, etc. Defect of the refrigerant
system.
Replace the discharge pipe
thermistor.
Replace outdoor unit PC board
(A1P).
(V3068)
Troubleshooting