Danfoss Optyma iCO2 User Manual page 59

User Guide | Optyma™ iCO2
Error code
Remote control: –
7-segment display: E48-1,2
*1
*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: *2 Refer to resistance on another table (Page 58)
*4 Speed command voltage 0 ～ 7.5[V]
If the same error does not reappear, continue to get data with Mente PC.
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
LED Green Red
Keep
Condensing
*1
unit
*1
ashing
5.Troubleshooting
A
*3
Is there DC15V output
for the control PCB?
Y es
*2
4Is there a short circuit on
the resistance of the fan
motor signal wiring?
No
Turn o the unit, connect CNFAN1 & CNFAN2 on control PCB
and turn the unit back on again
Do the
fan motors run?
Yes
*5
Is the fan speed
command same as the
current fan speed?
Y es
Has any anomaly
occurred?
Content
DC fan motor anomaly (2/2)
Diagnosis
No
Y es
Change CNFAN position on control PCB
No
(CNFAN1 connect CNFAN2 connector
and CNFAN2 connects on CNFAN1)
Is the faulty fan motor
running?
*4
Is the fan speed
No
within the normal
command voltage
range?
Y es
Which is FG signal,
"0" or "5V "?
5V
*3 Measurement item Between 1-6 pin of CNFAN connector for control PCB
*5 Checking by Mente PC or 7-segment
Countermeasure
Replace the control PCB
Replace the fan motor
Yes
Replace the control PCB
No
Replace the fan motor
No
0V
Replace the control PCB
Y es
Replace the fan motor
No
Keep watching
BC408445719305en-000101 | 59