Visible symptom:The oil is black and/or has aluminum particles in it.

Cause:

Insufficient refrigerant in the system, or the system has been blocked, leading to overheating

of the compressor which will cause a breakdown of the internal parts.

Result/customer feedback:

Claim is rejected.

Visible symptom:The oil is discoloured green.

Cause:The system was not flushed correctly before installation, or too much or wrong UV leak dye/universal oil.

Too much or wrong UV leak dye/universal oil will cause an insuffient effect (lubrication) of the contaminated oil, and in time that will cause a breakdown of the internal parts.

It is allowed to add UV-dye up to max. 5% of the total oil quantity.

Result/customer feedback:

Claim is rejected.

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Compressor FailureTROUBLE SHOOTING

Compressor Failure TROUBLE SHOOTING

Visible symptom:Discharge side (small hole) is clean, but the suction side (bigger hole) has black residue.

Cause:

Due to insufficient refrigerant or compressor oil in the system, leading to overheating of the

compressor.

Result/customer feedback:

Claim is rejected.

Visible symptom:The compressor is burned on the clutch/belt-wheel.

Cause:The compressor has been exposed to too much heat due to insufficient refrigerant or compressor oil in the system, leading to overheating of the compressor. The coating of the clutch/pulley

will be burned and be a brownish color.

Result/customer feedback:

Claim is rejected.

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Visible symptom:The epoxy in the coil has bubbles, cracks and looks “dried out”.

Cause:

The compressor has been exposed to too much heat due to insufficient refrigerant or compressor

oil in the system, leading to overheating of the compressor.

Result/customer feedback:

Claim is rejected.

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Visible symptom:The shaft on the compressor is stuck.

Cause:

The cause of the failure is due to missing oil. If the system is low on oil, the temperature will

rise inside the AC compressor, and due to higher friction that will, in time, cause a breakdown

of the internal parts.

To reject this type of claim, the oil drained from the compressor must be contaminated. If the

oil is clean, a thorough test must be done to identify the failure.

Result/customer feedback:

Claim is rejected.

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Compressor Failure TROUBLE SHOOTING

Installation requirements and advise

• Remove the failed compressor, and try to determine the cause of the defect. When removing the hoses connected to the compressor, please make

sure to protect the connections. This is to avoid impurities sticking to the connection during installation of the compressor.

• The system must be properly flushed using R134a or a specially designed flushing solution. After flushing, make sure that no refrigerant or flushing liquid is left in the system,

and dry the circuit using nitrogen if necessary. It is not advisable to reuse any refrigerant removed from the circuit, seeing that the used refrigerant is

most likely contaminated with impurities from the replaced compressor.

• Then complete the installation of replacement parts (dryer/accumulator, expansion valve or orifice tube).

• Check that the level of pre-filled oil is according to the vehicle manufacturer´s instructions. If extra filling is necessary, make sure to use oil of the same

viscosity as the vehicle manufacturer´s instruction.

• After checking or filling the oil, please turn the clutch on the compressor 10 times to distribute the oil inside.

• When mounting the compressor, do not remove the safety caps in the connection holes before the hoses are connected. This is to avoid impurities to

enter the system during the mounting of the compressor.

• Fill or re-charge the refrigerant cycle with the prescribed amount of refrigerant according to instructions. Only R134a can be used as refrigerant!

• Make sure the belt is aligned correctly when installed.

• Make sure the condition of the condenser is so that the performance is sufficient to maintain the proper temperature in the system. A non-conforming

condenser may cause overheating of the compressor.

• Before the vehicle can operate at usual working level, it must be started and left running at idling speed for a couple of minutes.

Visible symptom:The compressor is working as it should, but is making too much noise.

Cause:If the compressor is running like it should, but is exceeding the level of DB allowed, it indicates that the necessary run-in time of 2 to 3 minutes in the idling position (1000-1500rpm) was either not respected, or carried out at a too high rotational speed.

To reject this type of claim, the oil drained from the compressor must be contaminated. If the oil is clean, a thorough test must be done to identify

the failure.

Result/customer feedback:

Claim is rejected.

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