-
158
-
'17 • PAC-T-256
E39
1. Applicable model
5. Troubleshooting
All models
Diagnosis
Countermeasure
Is the
discharge pipe
temperature sensor
connector connected
properly?
YES
Are the
characteristics
of discharge pipe
temperature
sensor OK?
NO
For the characteristics of discharge pipe
temperature sensor, see the following graph.
YES
140
120
100
80
60
40
20
0
0
100
50
[T 90
°C
]
NO
Temperature-resistance characteristics
Temperature sensor resistance (k
Ω
)
Temperature (°C)
(Broken wire)
(Short circuit)
Correct connector.
Defective discharge
pipe temperature
sensor
➞
Replace.
Defective outdoor unit
control PCB
➞
Replace.
(Defective temperature
sensor input circuit)
2. Error detection method
Detection of anomalously low
temperature (resistance) on
the discharge pipe temperature
sensor
3. Condition of error displayed
When the temperature sensor
detects -25°C or lower for 5
seconds continuously within
10 minutes to 10 minutes 20
seconds after the compressor
ON, the compressor stops. After
3-minutes delay, the compressor
starts again automatically, but
if this anomalous temperature
is detected 3 times within 40
minutes.
4. Presumable cause
• Defective outdoor unit control
PCB
• Broken sensor harness or
temperature sensing section
(Check molding.)
• Disconnected wire connection
(connector)
Note:
Error code
Remote control:
LED
Green
Red
Outdoor unit control PCB
Outdoor unit
inverter PCB
Keeps flashing
Indoor unit control PCB
Stays OFF
Keeps flashing
Content
Keeps flashing
Yellow
8-time flash
Discharge pipe temperature
sensor anomaly
