Danfoss Optyma iCO2 User Manual page 58

User Guide | Optyma™ iCO2
Error code
Remote control: –
7-segment display: E48-1,2
*1 E48-1:FMO1 / 1-time ash, E48-2:FMO2 / 2-time ash
1. Applicable model
All models
2. Error detection method
• When fan speed command is
400min-1 or lower and over
current status is detected 10
times continuously
• When actual fan speed is 100
min-1 or lower for 30 seconds
3. Condition of error displayed
• When fan speed command
is 400min-1 or lower and
overcurrent status is detected
10 times continuously
• When actual fan speed is
100min-1 or lower for 30
seconds (Fan motor is locked.)
4. Presumable cause
• Disconnection of wiring or
loose connection of connector
• Fan motor anomaly
• Control PCB anomaly
• Power PCB anomaly
Notes: *1 Measurement item Connector of power source wiring for fan motors (RED - BLACK)
*2 Refer to resistance on another table (Page 58)
If the same error does not reappear, continue to get data with Mente PC.
58 | BC408445719305en-000101
LED Green Red
Condensing Keep
*1
*1
unit ashing
5.Troubleshooting
Save the Mente PC data of 30 minutes before stopping
*1
Is there DC325V
output on the fan
motors?
Is the power source
fuse on power PCB
Y es
*2
Is there a short circuit on
the fan motor power
source resistance?
No
Does the fan motor
of condensing unit rotateIs
smoothly when turning
it by hand?
Y es
Turn o the unit, disconnect CNFAN1 & CNFAN2 from control
PCB and turn the unit back on again
Is there DC1 5V on
CN1 5V on
control PCB?
Y es
Content
DC fan motor anomaly (1/2)
Diagnosis
No
No
burned out?
Is there any
scratch on the
coating of the wiring and/or
Y es
is it disconnected?
Replace the fuse
Y es
No
Is CN15V- 2
No
connected on power
PCB ?
A
Refer to next page
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
Countermeasure
Y es
Repair wiring.
No
Replace the power PCB.
Replace the fan motor.
Replace the fan motor.
Y es
Replace the power PCB.
No
Connect CN15V-2 on
power PCB.