Kaisai KMK-60RY1, Руководство по обслуживанию

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M thermal Split
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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 3-5.3: 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 KHA-06RY1 KHA-08(10)RY1 KHA-12(14,16)RY3
Current
max
18A 19A 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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5.5 Voltage Protection Control
This control protects the Split from abnormally high or abnormally low voltages.
Figure 3-5.6: Compressor voltage protection control
For single phase models, when the phase voltage of AC power supply is at or above 265V for more than 30 seconds, the
system displays H7 protection and the unit stops running. When the phase voltage drops below 265V for more than 30
seconds, the refrigerant system restarts once the compressor re-start delay has elapsed. When the phase voltage is below
172V, the system displays H7 protection and the unit stops running. When the AC voltage rises to more than 180V, the
refrigerant system restarts once the compressor re-start delay has elapsed.
For three phase models, when the phase voltage of AC power supply is at or above 457V for more than 30 seconds, the
system displays H7 protection and the unit stops running. When the phase voltage drops below 440V for more than 30
seconds, the refrigerant system restarts once the compressor re-start delay has elapsed. When the phase voltage is below
298V, the system displays H7 protection and the unit stops running. When the AC voltage rises to more than 312V, the
refrigerant system restarts once the compressor re-start delay has elapsed.
5.6 DC Fan Motor Protection Control
This control protects the DC fan motors from strong winds and abnormal power supply. DC fan motor protection occurs
when any one of the following the following three sets of conditions are met:

Outdoor ambient temperature is at or above 4°C and actual fan speed differs from target fan speed by 200rpm or
more for more than 3 minutes.

Outdoor ambient temperature is below 4°C and actual fan speed differs from target fan speed by 300rpm or more for
more than 3 minutes.

Actual fan speed is less than 150rpm for more than 90 seconds.
When DC fan motor protection control occurs the system displays the H6 error code and the unit stops running. After 3
minutes, the unit restarts automatically. When H6 protection occurs 10 times in 120 minutes, the HH error is displayed.
When an HH error occurs, a manual system restart is required before the system can resume operation.
5.7 Water Side Heat Exchanger Anti-freeze Protection Control
This control protects the water side heat exchanger from ice formation. The water side heat exchanger electric heater is
controlled according to outdoor ambient temperature, water side heat exchanger water inlet temperature and water side
heat exchanger water outlet temperature.
In cooling mode, if inlet water temperature or leaving water temperature or auxiliary heat source leaving water
temperature is below 4°C, the anti-freeze protection actions. In heating/DHW mode, if ambient temperature is below 3°C
and inlet water temperature or leaving water temperature or auxiliary heat source leaving water temperature is below 5°C,
the anti-freeze protection actions. In heating/DHW mode, leaving water temperature is below 2°C, the anti-freeze
protection actions. When water side heat exchanger anti-freeze protection occurs the system displays error code Pb and
the unit stops running.
Single phase model: Voltage ≥
265V for 30s or Voltage ≤ 172V
Three phase model: Voltage ≥
457V for 30s or Voltage ≤ 298V
Single phase model: Voltage <
256V for 30s or Voltage ≥ 180V
Three phase model: Voltage <
440V for 30s or Voltage ≥ 312V
Normal operation
Compressor voltage protection, error code H7 is displayed
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