2205B0JE-DA-J-N_2014.05.
5 Maintenance and Inspection
Screw Compressor J-series 5.2 Maintenance List
5-2
5.2 Maintenance List
5.2.1 Daily Management
The controller panel installed to the compressor package in standard displays the following items that
monitor the compressor operating conditions.
Suction pressure (MPa)
Discharge pressure (MPa)
Lubrication pressure (MPa)
Oil filter pressure loss (MPa)
Suction temperature (°C)
Discharge temperature (°C)
Oil supply temperature (°C)
Motor current (A)
Indicated load of unloader (%)
Compressor Vi setting (-)
Suction superheat (°C)
Discharge superheat (°C)
Note: Unless otherwise noted, the pressure unit MPa represents the gauge pressure in this
manual.
These operation data should be recorded in an operating log book on a daily basis. This practice is
significantly effective and helpful in finding out any abnormal condition of the compressor and prevents
possible compressor failures.
In particular, it is important to confirm the absence of any abnormality between the temperature and
pressure correlations related to the refrigerant evaporation and condensation. It is possible to find any
abnormal condition in the compressor or the system quickly by monitoring the evaporation and
condensation temperature and pressure.
If any compressor/system failure or operating accident occurs, the operating log book will help the
cause to be clear and take appropriate measures promptly.
Figure 5-1 Controller Display Screen (Example)