Wellea Monobloc
20
5.3
Discharge Temperature Protection Control
This control protects the compressor from abnormally high temperatures and transient spikes in temperature.
Figure 3-6.3: High discharge temperature protection control
When the discharge temperature rises above 115°C the system displays P4 protection and the unit stops running. When
the discharge temperature drops below 90°C, the compressor enters re-start control.
Figure 3-6.4:Low discharge temperature protection control
When the discharge temperature is at or below 15°C for more than 5 minutes, the system displays EA protection and the
unit stops running. When the discharge temperature rises to 27°C or higher, the compressor enters re-start control.
5.4
Compressor Current Protection Control
This control protects the compressor from abnormally high currents.
Figure 3-6.5: Compressor current protection control
Table 3-6.1: Current limitation for compressors
Model name
5/7/9kW
12/14/16kW H91
12/14/16kW H93
Compressor model
SVB220FLGMC-L
MVB42FCBMC
MVB42FCBMC
Current
max
20A
31A
15A
When the compressor current rises above Current
max
the system displays P3 protection and the unit stops running. When
the compressor current drops below Current
max
, the compressor enters re-start control.
Discharge temperature > 115°C
Discharge temperature < 90°C
Normal operation
High discharge temperature protection, error code P4 is displayed
Discharge temperature ≤ 15°C for
more than 5 minutes
Discharge temperature ≥
27°C
Normal operation
Low discharge temperature protection, error code EA is displayed
Current > Current
max
Current < Current
max
Normal operation
Compressor current protection, error code P3 is displayed
