Danfoss Optyma iCO2 User Manual page 54

User Guide | Optyma™ iCO2
Error code
Remote control: –
7-segment display:
*1 E41 (E51) -1: CM1
*2 E41 (E51) -1: 1-time ash
1. Applicable model
All models
2. Error detection method
When E41 is displayed on the
7-segment LED display
3. Condition of error displayed
Error signal from power
transistor is detected 5 times
within 60 minutes. (E41)
Or error signal from power
transistor is detected for 15
minutes continuously (E51)
4. Presumable cause
• Power transistor anomaly
• Power transistor temperature
sensor anomaly
• Anomalous power source to
inverter PCB
Note: Inverter cooling fan is operated under the condition mentioned at right.
If the same error does not reappear, continue to get data with Mente PC.
54 | BC408445719305en-000101
LED Green
*1
Keep
Condensing
unit
E41(E51) -1
ashing
5.Troubleshooting
Save the Mente PC data of 30 minutes
before stopping
Is the fan of gas
cooler rotating?
YES
Reset the power source and restart operation
restarting operation, does the
same error reappear?
YES
inverter cooling fan
YES
of power source voltage detected
at the C19 terminal of
inverter PCB?
YES
After power OFF
connection of power
transistor sensor connector OK?
(Check short circuit and
disconnection of
wiring harness)
YES
characteristics of power
transitor temperature sensor
YES
power transistor
mounted properly?
(Check tightning of screws and
application of silicon
for radiation)
Red
Content
Power transistor overheat (CM1)
*2
Diagnosis
After
Is the
rotating?
Is DC15V
Is the
Is the
OK?*
* See characteristic of sensor
for details.
Is the
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
Countermeasure
• Check the operation status and
record it.
• Check the power transistor
temperature.
• Check the operation of the fan of
gas cooler and the operation of
inverter cooling fan.
NO
Rectify it according to the
troubleshooting procedure of E48.
Restart operation under the
operating conditions 30 minutes
before error occurred as possible
as you can.
Wait and see.
NO
(If possible, collect the operation
data continuously.)
If it does not run despite its
operation range, check the voltage
NO at connector.
If 400V is detected, replace fan
motor.
If 0V is detected, replace control
PCB.
After checking loose connection
NO
of connector or disconnection of
wiring harness, replace inverter
PCB.
NO Connect the connector of sensor
securely.
Or replace the sensor.
Replace the power transistor
NO
sensor.
Apply the silicon for radiation to
NO
the power transistor and mount
the power transistor on to the
radiation n securely.
YES
Replace the power transistor.
OFF
55°C
Power transistor temperature sensor
ON
67°C