5.Troubleshooting
Diagnosis
Countermeasure
Before
starting operation, is the power
to the condensing unit
turned ON?
NO
YES
Reset the power source and restart operation
Is the
refrigerant amount adequate?
(If recharging refrigerant after rectification,
check whether the specified
refrigerant amount
was charged.)
NO
YES
NO
Is there
any leak of refrigerant?
Is balancing pressure higher or lower
than the pressure of saturated
temperature?*
YES
NO
Does
low pressure become
altered after starting
operation?
Does the opening
of the EE V on the cooler
side change?
NO
Is the
connection of low pressure
sensor connector
OK?
NO
* In case of 31°C or lower
YES
NO
Is the EE V coil on
the cooler side OK? (Check
continuity)
YES
YES
YES
The refrigerant may
be accumulated in the
accumulator.
After supplying power for
more than 6 hours, restart
operation.
Purge refrigerant and
recharge refrigerant
properly.
Refrigerant is leaking.
Specify the leak point and
after rectifying the leak
point, recharge refrigerant
properly.
Correct the connection.
Check the low pressure
sensor If it has a problem,
replace the sensor.
Check connection
of connectors and
characteristics of sensors
that control the opening of
the EEV on the cooler side.
Replace EEV coil.
Clogging of strainer or
anomaly of the EEV body
may cause.
Check them.
If it has a problem, replace
it.
• Leak of refrigerant
• EEV on the cooler side
anomaly
If error signal is detected 10
times within 60 minutes
Detection of anomalously low
pressure
• LP 5.8 bar is detected for
2 seconds continuously
Note:
Error code
Remote control:
7-segment display:
LED
Green
Red
Keep
flashing
1-time
flash
Content
–
E49-1
Low pressure anomaly
All models
Condensing
unit
1. Applicable model
2. Error detection method
4. Presumable cause
3. Condition of error displayed
User Guide | Optyma™ iCO2
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
BC408445719305en-000101 | 61
