6
6
.
.
C
C
O
O
N
N
T
T
R
R
O
O
L
L
M
M
O
O
D
D
E
E
L
L
DC INVERTER AIR CONDITIONER TECHNICAL& SERVICE MANUAL V3.3
86
Four-way valve of the outdoor machine shuts down when cooling and defrosting
but starts when heating. During the heating process, the four way valve to stop working for a
period of time after compressor disconnect.
7. Start-up Protection:
To prevent compressor from restart frequently in the condition that system
pressure has not been completely balanced, it can’t be restarted within 3 minutes.
8. Pressure Protection:
When the pressure increases to a preset value, the pressure switch will
automatically protect. Compressor will stop and report the fault code protection.
