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User Guide | Optyma™ iCO2
5.6 Regular inspection check sheet
This table shows points of regular inspection to use safely the refrigerating equipment which uses highly
pressurized CO2 refrigerant. Inspect the machine regularly and, if any anomaly is discovered, repair it immediately,
particularly when corrosion generates widely over the surface of compressor, or vessels, and deteriorates their
strength. Inspect the Optyma iCO
regular inspection check sheet.
Inspection item
Does abnormal vibration, noise occur?
Does oil spread around or inside?
Are there traces of running rusty water around or inside?
Is the drain pan discharge outlet clogged?
Is rust observed on the surface of compressor?
Is rust observed on the surface of vessels?
Are insulation materials deteriorated, broken?
• Piping (Aeroflex)
• Compressor (felt, Aeroflex)
• Accumulator (Aeroflex)
• Receiver (Aeroflex)
Is the heat exchanger damaged?
Is the heat exchanger corroded?
Does oil spreads on the heat exchanger?
Is piping in the machine corroded?
Is piping in the machine rubbed?
Does oil spread at pipe joints on the compressor?
Are compressor terminals deteriorating?
Is the compressor casing rusty, corroded?
Does oil spread at expansion valve joints?
Are service ports capped?
Does oil spread at service ports?
Does oil spread at brazed sections?
Is it frosting?
Is the indicator hardware corroded?
Are resin bands tightened properly?
Are resin bands cracked?
Does abnormal noise or vibration (chatter) occur on the
compressor or fan motor?
Does flash-gas generate at the liquid outlet?
Isn't refrigerant overcharged?
(Does the high pressure error (7 segment display, E40) or
liquid back from the medium pressure receiver (7 segment
display, E43) occur?)
Is the oil level maintained above the lower limit during ope-
ration?
(Check with 7 segment display, C32: Level switch.)
Does oil spread around or inside?
Is the movement control pressure suitable to the purpose of
low pressure devices (load side)?
Is the cooling capacity of low pressure devices (load side)
correct?
(Turn off the thermostat.)
Is it normal the frequency of compressor start/stop? (10
times/h)
Is the suction gas superheating degree correct?
(7 segment display, C49: Suction superheating degree 1,
[Judgment guide]
1. It is not frosting at the compressor side from its suction
inlet.
2. 5 deg ≤ TsSH ≤ 40 deg
Is the discharge gas temperature correct?
(7 segment display C08: Discharge pipe temperature (CM1),
[Judgment guide] Td 125°C or under
Is the waste heat short-circuited?
(7 segment display C02: Outdoor air temperature (Tho-A))
42 | BC408445719305en-000101
at installation after regular interverals. Record the inspection results on the
2
Inspection at installation(1)
Installation ID
Installation Date
Remarks
Inspection at installation(2)
© Danfoss | Climate Solutions | 2023.01 | LCA012A030
Inspection at installation(3)
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