Abnormal Discharge Pipe Temperature - Daikin E-Series Service Manual

Troubleshooting for Outdoor Unit
7.7

Abnormal Discharge Pipe Temperature

F3
Remote
Controller
Display
Applicable AII outdoor unit models
Models
Method of Abnormality is detected according to the temperature detected by the discharge pipe
temperature sensor.
Malfunction
Detection
Malfunction When the discharge pipe temperature rises to an abnormally high level
When the discharge pipe temperature rises suddenly
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
366
Faulty discharge pipe temperature sensor
Faulty connection of discharge pipe temperature sensor
Faulty outdoor unit PCB
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?
(3.5~400KΩ)
∗
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P405.
YES
NO
SiAU18-715
Refrigerant shortage,
compression defect, etc.
Defect of the refrigerant
system.
Replace the discharge
pipe thermistor.
Replace outdoor unit PC
board (A1P).
(Q0556)
Troubleshooting