57
If there is not enough refrigerant in the system, this is indicated by gas bubbles in the
moisture sight glass .the unit will have poor performance.
If the low refrigerant charge is significant, large bubbles appear in the moisture sight
glass and the suction pressure drops, then the compressor suction superheat will also
be high.
Find the leak and completely drain the system with a refrigerant recovery unit. Carry
out the repair, leak test and then recharge the system.
Note:
After the leak has been repaired, the circuit must be tested, without exceeding the
maximum low-side operating pressure shown on the unit name plate.
The refrigerant must always be recharged in the liquid state into the liquid line.
The refrigerant cylinder must always contain at least 10% of its initial charge.
For the refrigerant quantity per unit, refer to the data on the unit name plate.
Verify the Alarm Status
1.
Check the alarm menu when the unit is in the standby mode to see if any alarms or
warning have occurred.
Electrical Maintenance
1.
Check for correct termination tension of the electrical connections, contactors,
isolation switch and transformer.
2.
Check the condition of the contactors, fuses and capacitors,
3.
Check the condition of the electrical cables and their insulation.
4.
Carry out an operating test of tray de-icing heater, compressor oil heater,
refrigerant valve and expansion device.
5.
Check the phase/earth insulation of the compressors, fans and pumps.
6.
Check the compressor, fan and pump winding status.
Maintenance
Содержание AS10S/L
Страница 3: ...2 Nomenclature ...
Страница 9: ...8 Positioning 1 550mm 600mm 550mm 600mm Positioning ...
Страница 35: ...34 Three curves of different ST05 setting User Guide ...
Страница 60: ...59 Dimensions AS10S L AS13S L 1096 550 500 1040 143 476 151 AS20S L Dimensions ...
Страница 63: ...62 AS20S L m3 h 10 20 30 1 0 2 0 3 0 4 0 40 KPa 5 0 Water Pressure Plots ...
Страница 64: ...63 Temperature and sensor resistance table Temperature and sensor resistance table ...
Страница 65: ...64 Temperature and sensor resistance table ...