Error code
Remote control:
7-segment display:
LED
Green
Red
Keep
flashing
Content
–
E59-1
Compressor startup failure
5. Troubleshooting
Diagnosis
Countermeasure
Is
The power source voltage
OK?
Is it the unit with
one compressor?
Does it start up?
Is there
inverter output?
Is DC15V detected
on inverter PCB?
(*3)
Check resistance between
power transistor modules. (Is it
shortcircuited?) (*4)
Check inverter PCB for
defect with the checker.
Ar e
all pressures equalized
during 3 minutes delay before
compressor
starts up?
Specifications: AC 380/400/415V 50Hz ±5%
Is there
disconnection of power
cables connected to the
compressor
terminal?
Save the Mente PC data of 30
minutes before stopping
Check the data 30 minutes
before stopping
Startup compressor by test run mode under the
condition of no pressure difference
Does it start up?
YE S
YE S
NO
NO
NO
YE S
Change wire connections
on inverter and compressor,
and operate again.
Does it
repeat on the other
compressor?
NO
YE S
YE S
YE S
(1 unit only starts up.)
NO
(None starts up.)
Good
Short-circuited.
Power
transistor
error
Other (Including checker not available)
NO
NO
NO
NO
YE S
YE S
YE S
YE S
(Both units start
up.)
・
Check the operation
status and record it.
Check the power source
voltage and correct it.
Is the capillary tube
returning oil from oil
separator clogged?
Does EEV actuate
normally?
Replace the power cable
(If there is a problem on
the terminal of compressor,
replace compressor.
Wait and see.
Replace compressor.
Measure after confirming
that 52C or 52X is turned
ON.
Replace inverter PCB.
Replace power transistor.
Replace power transistor.
Replace inverter PCB.
Wait and see.
Replace compressor.
When it fails to change over to
the operation for rotor position
detection of compressor motor
If the compressor fails to startup
20 times (10 patterns×2 times)
continuously.
・
Anomalous power source
voltage
・
Faulty component for
refrigerant circuit
・
Inverter PCB anomaly
・
Disconnection of power cable
and/or poor connection of
connector
・
Compressor anomaly (Motor
or bearing)
・
Power transistor anomaly
Note: *3 Measurement position: B and - of C19 or Between pins 5-8 of PC18, 19 and 20
*4 Measurement position: Check resistance between P-U, P-V, P-W, N-U, N-V, N-W, P-N. (Disconnect compressor wires before measurement.).
If it fails to repeat, connect the Mente PC, and continue to collect data.
1-time
flash
All models
1. Applicable model
2. Error detection method
4. Presumable cause
3. Condition of error displayed
Condensing
unit
User Guide | Optyma™ iCO2
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
BC408445719305en-000101 | 67