Kaisai 06RY1, Service Manual

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M thermal Mono
22 202008
Midea
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5.3 Discharge Temperature Protection Control
This control protects the compressor from abnormally high temperatures and transient spikes in temperature.
Figure 3-5.3: 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 95°C, the compressor enters re-start control.
Figure 3-5.4:Low discharge temperature protection control
When the discharge temperature is lower than suction temperature for more than 5 minutes, the system displays EA
protection and the unit stops running. When the discharge temperature is higher than suction temperature, the
compressor enters re-start control.
5.4 Compressor Current Protection Control
This control protects the compressor from abnormally high currents.
Figure 3-5.5: Compressor current protection control
Table 3-5.1: Current limitation for compressors
Model name
6kw 8-10kw 12-16kw 1ph 12-16kw 3ph
Current
max
18A 19A 30A 14A
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 < 95°C
Normal operation
High discharge temperature protection, error code P4 is displayed
Tp
＜
Th for more than 5 minutes
Tp ≥ Th
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
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