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charge, it may suffice to observe through the sight glass on the liquid line whether bubbles come into being
in the gas. If the gas charge is not sufficient, then bubbles will come into being in the gas (it should never be
ignored that the state of gas overcharge cannot be perceived this way.). It means two things if bubbles exist
in the gas. The amount of the gas may not be sufficient, or there may be a gas leak within the system. If the
gas charge is not sufficient, some additional gas should be charged. If bubbles come into being again despite
the gas charge, it means a gas leak in the system. In this case, the leak should be spotted by using soap
bubbles, and it should be eliminated afterwards.
Additionally, the chromatic indicator in the sight glass is green under normal circumstances. If it may be
spoken of humidity mixing with the gas, the indicator will turn yellow. In this case, the gas and the dryer
within the system should replaced by the new ones.
10.1.9. Evaporation Pressure
In order to check this condition, the end of the ¼"-diameter service valve on the suction side of the
compressor should be attached with a manometer which has 20 bars as the last pressure value on its scale,
and the valve should be checked to insure that it is open. Evaporation pressures and temperatures are
generally high within the units. Thus, if you read lower evaporation pressures and temperatures, this may
have various reasons. In this case, required steps should be taken by using troubleshooting tables.
10.1.10. Condensation Pressure
In order to check this condition, the end of the ¼"-diameter service valve on the force side of the compressor
should be attached with a manometer which has 20 bars as the last pressure value on its scale, and the valve
should be checked to insure that it is open.
Under a proper working condition, the condensation pressure should be fixed as long as possible. Lower
condensation temperatures will lead to lower evaporation temperatures, thus resulting in over-cooling and
over-humidity. Higher condensation temperatures will, on the other hand, hinder the efficiency of the
cooling system and lead to higher consumption of electricity.
Therefore, condensation temperatures should be kept, if possible, around 45-50ºC under working conditions.
This is accepted as 15ºC higher than the outdoor temperature. For example, f the outdoor temperature is
30ºC, then the condensation temperature should be selected to be 45ºC. This value should be determined
when choosing the condenser. It is quite natural that the condensation temperature will inevitably increase
dependent to higher outdoor temperatures. The temperature difference has been explained in the section of
limit values presented in the beginning of the instruction manual. You can herein find ΔT values to be used
dependent to outdoor temperatures. It is recommended that you receive assistance for selections.
Keys are provided on the air-cooling condensers arriving with the device to adjust the condenser fan
rotational speed based on the outdoor temperature. The problem of low condensation temperature due to low
outdoor temperatures will thereby be eliminated. This key is used under the IP 55 protection and is located
outdoors with the condenser. If the device has been purchased without a condenser, then the key should be
obtained as an accessory, and placed on the condenser side of the electrical panel.
The adjustments to be made on these keys are carried out in our factories. Should adjustment becomes a
need in the mounting place, it should be carried out by service professionals.
10.1.11. Dirt Status of Filters in the Liquid Line
The filters on the liquid line play a vital role for the units. Contamination, dirt and remnants to be involved
in gas lines at the factory or during the assembling-in-place enter the compressor, it may cause permanent
damages to the compressor.
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Table of Contents
Troubleshooting
