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P
art 3 - Contr
ol
5 Protection Control
5.1 High Pressure Protection Control
This control protects the refrigerant system from abnormally high pressure and protects the compressor from transient
spikes in pressure.
Figure 3-6.1: High pressure protection control
Notes:
1.
P
c
: Discharge pressure
When the discharge pressure rises above 4.4MPa the system displays P1 protection and the unit stops running. When the
discharge pressure drops below 3.2MPa, the compressor enters re-start control.
5.2 Low Pressure Protection Control
This control protects the refrigerant system from abnormally low pressure and protects the compressor from transient
drops in pressure.
Figure 3-6.2: Low pressure protection control
Notes:
1.
P
e
: Suction pressure
When the suction pressure drops below 0.14MPa the system displays P0 protection and the unit stops running. When the
suction pressure rises above 0.3MPa, the compressor enters re-start control.
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
When P0 protection occurs 3 times
in 60 minutes, the HP error is
displayed. When an HP error occurs,
a manual system restart is required
before the system can resume
operation.
P
c
> 4.4MPa
P
c
< 3.2MPa
Normal operation
High pressure protection, error code P1 is displayed
P
e
< 0.14MPa
P
e
> 0.30MPa
Normal operation
Low pressure protection, error code P0 is displayed
Discharge temperature > 115°C
Discharge temperature < 90°C
Normal operation
High discharge temperature protection, error code P4 is displayed
MUNDOCLIMA AEROTHERM V17 - BIBLOC
