F3" Outside Unit: Abnormal Discharge Pipe Temperature; Abnormal Discharge Pipe Temperature - Daikin VRV - WII Service Manual

SiUS30-604
2.18 "F3" Outside Unit:
F3
Remote
Controller
Display
Applicable RWEYQ60, 72, 84MTJU
Models
Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature
sensor.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting

Abnormal Discharge Pipe Temperature

When the discharge pipe temperature rises to an abnormally high level (over 135°C)
When the discharge pipe temperature rises suddenly (over 120°C continues 10 min.)
Faulty discharge pipe temperature sensor
Faulty connection of discharge pipe temperature sensor
Faulty outdside unit PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Connect the Service Checker.
Restart operation after resetting
operation.
Are
discharge pipe
thermistor characteristics
normal?
(∗1)
YES
Is
PCB detection
temperature normal?
(∗2)
YES
• The discharge pipe thermistor is normal and the main PCB
temperature detection is also normal.
• In fact, discharge pipe temperature is rising.
CHECK 3 : Refer to page 251 to eliminate the causes of
overheat operation.
∗1: Compare the resistance values of the discharge pipe thermistor with
measurements of a surface thermometer.
(For temperature and resistance characteristics of a thermistor, refer to
page 278, 279.)
∗2: Compare the discharge pipe temperature checked by the Service
Checker with the resistance of the thermistor (refer to ∗1).
Troubleshooting by Indication on the Remote Controller
NO
NO
Replace the discharge pipe
thermistor.
Replace the main PCB.
181