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Part
Inspection
Cycle
(time/year)
Guide for
replacement
Electric
circuit parts
Relay
Operation, contact/ insulation resistance
1
8 years
Solenoid valve, electronic
expansion valve coil
Insulation resistance
1
8 years
Crankcase heater
Insulation resistance
1
20,000 h
Fuse
Appearance
1
8 years
PCB (Control, inverter)
Appearance
1
8 years
High pressure breaker, pressure
sensors
Contact resistance, capillary rubbing
1
8 years
Terminal block
Looseness on terminal board
1
8 years
Wring, connector
Disconnection, looseness, deterioration, rubbing
1
8 years
Dielectric capacitor
No liquid leak, deformation allowed
1
8 years
Cooling fan
Insulation resistance, noise
1
8 years
Electromagnetic switch (52C)
Contact resistance, operation
1
8 years
Blower
Propeller fan
Balance, crack
1
8 years
Fan motor
Insulation resistance, noise, vibration
1
20,000 h
(2) When a protective device has tripped
• When the Condensing unit is stopped by a protective device, consult your dealer or contact desk of maker. Report (1) Product model, (2) Alarm code
content and (3) Condition of failure, referring to page 37, “5.5 Operation data check sheet”
• Upon receipt of a report on the trip of protective device and resulting stop of Condensing unit, reconfirm whether it was operated within a proper
operating range and did match the load capacity that of the Condensing unit. For major items, refer to the table on page 41.
• If the Condensing unit or parts of refrigerant circuit have failed, take care of following points in order to prevent recurrence of the failure.
• Diagnose the cause in detail to identify the location and cause of failure.
• When repairing a leak from welding on pipe, make sure to recollect the refrigerant, and weld by passing nitrogen gas.
• When replacing the compressor, restore original formation on the suction, discharge pipes of compressor and the liquid injection pipe. If the formation
is changed, it could cause cracks on pipes owing to vibration. Take care not to mistake on the wire connection of compressor (R, S, T) to prevent reverse
phase.
• When a part failed (including compressor), do not replace the while Condensing unit, but replace defective part only.
• When disposing the Condensing unit, make sure to collect the refrigerant beforehand. When the cause of failure is unknown, check the model of
Condensing unit, production No. and condition of failure, and report them to specified service company.
Protective device activation value
Name
Symbol
Activation value
High pressure switch
63H
Activation value/release value = 140
+0
- 10
/90 bar
Current sensor (compressor)
CT
OP-UPAC015COP04E: 19A
Discharge pipe temperature sensor
Th0-D1
Activation value * 135C
Fuse (gas cooler motor)
CNDC1,2
4A
• If the load of loading equipment is too large or when the user has turned ON the Condensing unit with the power source to the loading equipment
turned OFF, the Condensing unit may repeat start and stop.
If such stops were repeated 120 times within 24 hours continuously, the 7-segment display indicates “oPE-11”. Check the load condition.
“oPE-11” can be cancelled with the error inspection reset.
• Method of error inspection reset
When any error occurred, rest it as follows.
(1) Remove the cause of error.
(2) Change the display on the 7-segment display to “P20” by pressing SW8 and SW9, and press SW7 for more than 3 seconds.
(3) Change from “0” to “1” with SW8. The error will be reset.
Make sure, however, to check the error code and remove the cause of error before resetting.
If SW6-7 is turned to “ON”, the warning “oPE-11” is not displayed.
• When total operation time of compressor has exceeded 30,000 hours since the last maintenance, the warning “oPE-3” is displayed to urge the user to
request for maintenance. If this warning is displayed, you should prepare for maintenance.
External input connector name
Code No.
Data display range
Setting item
CNS3
P08
4: (Default) 0 – 20
0: External operation input
1: Demand input
2: Silent mode input
4: Forced oil return input
5: Gas cooler fan snow control input
9: Multistage demand input
CNG1
P09
5: (Default) 0 – 20
CNG2
P10
9: (Default) 0 – 20
User Guide | Optyma™ iCO2
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
BC408445719305en-000101 | 37