5.Troubleshooting
Diagnosis
Countermeasure
• Check the operation status and
record it.
Replace control PCB.
Replace inverter PCB.
Check the cause of F2 blown.
Check wiring mistake and short
circuit of AC220V line.
After checking, replace fuse F2.
Restart operation under the
operating conditions of 30 minutes
before error occurred as possible
as you can.
Wait and see.
(If possible, collect the operation
data continuously.)
Go to next page
High pressure sensor anomaly is
suspected.
After restarting operation, check
the high pressure sensor itself.
(If the high pressure sensor has
anomaly, replace it.)
Do not use pressure gauge
for mesuring pressure while
operating.
Clear the clog.
[Check items]
Gas cooler, Strainer,
Clogging of gas cooler.
Connect the connector
securely.
Rectify the disconnection
of 63H1-1 wire.
When E45 is displayed on the
7-segment LED display
• 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
Note: If the same error does not reappear, continue to get data with Mente PC.
Error code
Remote control:
7-segment display:
LED
Green
Red
Keep
flashing
1-time
flash
Content
–
E45-1
Communication error
between inverter PCB and control PCB
High pressure anomaly (63H1-1 activated)
Go to next page
YES
YES
YES
Is the LED 1
on the inverter PCB
flashing ?
Does E45 recur ?
Is the LED 2
on the control PCB
flashing?
Reset the power source and restart
Is the fuse F2 blown?
NO
Save the data 30 minutes
before stopping into the
Mente PC
NO
NO
NO
Does
63H1 activate at the
pressure 140 bar or
higher ?
Does
the high pressure
sensor (PSH1) show
140 bar?
Does the refrigerant
circuit get clogged?
Is
there loose
connection of 63H1-1at
the connector on the
PCB or disconnection
of 63H1-1wire?
YES
NO
YES
YES
YES
NO
NO
NO
YES
Condensing
unit
All models
1. Applicable model
2. Error detection method
3. Condition of error displayed
4. Presumable cause
User Guide | Optyma™ iCO2
56 | BC408445719305en-000101
© Danfoss | Climate Solutions | 2023.01 | LCA012A030