Error code
Remote control:
7-segment display:
LED
Green
Red
Keep
flashing
Content
*3 Check several times to prove any poor connection.
[Temperature-resistance characteristics]
Power transistor temperature sensor (Tho-P1)
Temperature (°C)
Resistance
(kΩ)
–
E56-1
Power transistor temperature sensor (Tho-P1) anomaly
5.Troubleshooting
Diagnosis
Countermeasure
NO
YES
Is the
connector of the
anomalous sensor
connected
properly?
Are
the characteristics
of sensor OK?
*3
NO
Save the Mente PC data of 30
minutes before stopping
YES
・
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
securely.
Replace power transistor
temperature sensor
(Tho-P1).
Replace the control PCB of
condensing unit.
Note:
140
120
100
80
60
40
20
200
180
160
140
120
100
80
60
40
20
0
0
1-time
flash
All models
Detection of anomalously low
temperature (resistance) of
power transistor temperature
sensor.
(Tho-P1)
・
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
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.
1. Applicable model
2. Error detection method
4. Presumable cause
3. Condition of error displayed
Condensing
unit
User Guide | Optyma™ iCO2
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
BC408445719305en-000101 | 65