Error code
Remote control:
7-segment display:
LED
Green
Red
Keep
flashing
1-time
flash
Content
5.Troubleshooting
Diagnosis
Countermeasure
Check the disconnection of wiring
harness and loose connection of
connector.
If there is a problem, collect it.
Disconnect the wiring harness
connected to resistance and check
the resistance value between
terminals of resistance.
If the resistance is broken, replace it.
If the resistance is broken, check
the wiring harness between diode
module and inverter PCB as well.
Check the disconnection of wiring
harness and loose connection of
connector.
If there is a problem, correct it.
Correct the setting of DIP switch.
Replace inverter PCB.
• Disconnection of signal
wiring harness
• Control PCB anomaly
• Inverter PCB anomaly
• Anonaly of inrush current
suppression resistance
When the communication
between inverter PCB and
control PCB is not established
When E45 is displayed on the
7-segment LED display
All models
From previous page
[Setting of DIP switch on i nverter PCB]
JSW10-1 OFF JSW11-1 ON
-2
OFF
-2 OFF
-3
OFF
-3 ON
-4
OFF
-4 OFF
YES
YES
YES
(Check
after Power OFF)
Is the connection of wiring
harness and connector
between inverter PCB
and control PCB
OK?
Is the
OK ?
connection of wiring
harness between diode
module and inverter PCB
Is the
DIP switch setting of
inverter PCB correct?*
* See foll owing for
Is the inrush
current suppression
resistance anormal?
YES
NO
NO
NO
NO
–
E45-1
Communication error
between inverter PCB and control PCB
High pressure anomaly (63H1-1 activated)
Condensing
unit
1. Applicable model
2. Error detection method
3. Condition of error displayed
4. Presumable cause
Note:
User Guide | Optyma™ iCO2
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
BC408445719305en-000101 | 57