Midea Aqua thermal Super Service Manual
6 Protection Control
6.1 High Pressure Protection Control
This control protects the refrigerant system from abnormally high pressure and protects the compressor from transient spikes in
pressure.
Notes:
1. P
c
: Discharge pressure
Notes:
1. P
e
: Suction pressure
6.3 Discharge Temperature Protection Control
This control protects the compressor from abnormally high temperatures and transient spikes in temperature.
When the discharge temperature rises above 115°C the system displays P0 protection and all the units stop running. When the
discharge temperature drops below 90°C, the compressor enters re-start control.
High pressure protection, error code P0 is displayed
When P0 protection occurs 3 times in
60 minutes, a manual system restart is
required before the system can
resume operation.
Low pressure protection, error code P1 is displayed
When P1 protection occurs 3 times in
60 minutes, a manual system restart is
required before the system can
resume operation.
Discharge temperature > 115°C
Discharge temperature < 90°C
High discharge temperature protection, error code P0 is displayed
When P0 protection occurs 3 times in
60 minutes, a manual system restart is
required before the system can
resume operation.
pressure.
This control protects
the
refrigerant
system from
abnormally low
pressure
and
protects the
compressor
from
transient
drops in
6.2
Low Pressure Protection Control
discharge
pressure
drops
below 3.2MPa,
the
compressor enters re-start control.
When
the
discharge
pressure
rises
above
4.3MPa
the
system
displays
P0
protection
and
unit
stop
running.
When
the