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19.15 Compressor discharge high pressure protection control
This control protect by using high pressure switch during operation.
Start conditions
o
High pressure switch is activated (from normally close to open) when outdoor operation mode is cooling or
heating during compressor running.
Control 1 content
o
Compressor stop when high pressure switch is opened and restart after high pressure switch closed. If this
condition happen 4 times within 30 minutes, “F94” is indicated.
o
After 30 minutes, counter is reset if this condition does not happen for 4 times.
Control 1 stop conditions
o
Power supply reset
o
Reset by using remote control
19.16 Compressor discharge high temperature protection control
This control detect compressor tank temperature (CU-2WZ71YBE5) and perform the compressor frequency
restriction.
Comp stop
Comp freq
restricted
Comp freq free
A
C
B
D
A
B
C
D
108.0°C
CU-2WZ71YBE5
104.0°C
101.0°C
97.0°C
Comp discharge temp CU-2WZ71YBE5
When the discharge temperature more than 108°C, the compressor stops.
If this conditions happens for 3 times within 30 minutes, “F97” is indicated.
19.17 Cooling Outdoor Air Temperature Control (Cool)
The compressor will be stopped to avoid compressor overloading.
-10°C
-12°C
COMP. ON
COMP. OFF
Outdoor
Air
Temperature
19.18 Heating Outdoor Air Temperature Control (Heat)
The compressor will be stopped to avoid compressor overloading.
-20°C
-22°C
COMP. ON
COMP. OFF
Outdoor
Air
Temperature
