Danfoss Optyma iCO2 User Manual page 65

User Guide | Optyma™ iCO2
Error code
Remote control: –
7-segment display:
1. Applicable model
All models
2. Error detection method
Detection of anomalously low
temperature (resistance) of
power transistor temperature
sensor.
(Tho-P1)
3. Condition of error displayed
Under the condition of 0°C or higher of
outdoor air temperature, if the sensor
detects disconnection for 20 seconds
continuously within 5 seconds after 10
minutes has elapsed since compressor
ON, it makes the compressor stopped.
After 3 minutes, compressor restarts
automatically. And then if this error is
detected 3 times within 40 minutes, it
makes error stop.
4. Presumable cause
・Broken sensor harness
or the internal wire of
sensing section (Check the
molded section as well.)
・Disconnection of sensor
harness connection
(connector)
・Control PCB anomaly
Note:
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
LED Green
Keep
Condensing
unit
ashing
E56-1
5.Troubleshooting
Save the Mente PC data of 30
minutes before stopping
connector of the
anomalous sensor
connected
the characteristics
of sensor OK?
*3 Check several times to prove any poor connection.
200
180
160
140
120
100
80
60
40
20
0
0
Red
Content
Power transistor temperature sensor (Tho-P1) anomaly
1-time
ash
Diagnosis
Is the
properly?
YES
Ar e
*3
[Temperature-resistance characteristics]
Power transistor temperature sensor (Tho-P1)
20 40 60 80 100
Temperature (°C)
Countermeasure
・Check the operation
status and record it.
・Check it occurs soon
after power ON or during
operation or during
stopping.
・Check sensing value
・Compare the temperature
shown in Mente PC data
to the acutal temperature
measured with thermometer.
Insert the connector
NO
securely.
Replace power transistor
NO
temperature sensor
(Tho-P1).
Replace the control PCB of
YES
condensing unit.
120 140
BC408445719305en-000101 | 65