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13.1.5 High Pressure Sensor Control
Purpose:
- To protect the system operation.
Detection period:
- After compressor on for 1 minute.
Detection conditions:
- When abnormal high voltage detection, 5 V or when open circuit detection 0V for 5 seconds continuously.
After detection:
- When abnormality is detected 4 times within 120 minutes, unit stop operation.
- OFF/ON control panel LED will blink (H64 error occurs).
13.1.6 Outside Temperature Current Control
23°C
21°C
14°C
12°C
-25°C
-28°C
Compressor stop
Outdoor temperature
Max.
current
value is
regulated
13.1.7 Crank Case Heater Control
Purpose:
- For compressor protection during low outdoor ambient operation (during heating low temperature operation).
Control content:
a. Trigger heater START condition
o When the outdoor air temperature is below than 5°C, and discharge temperature is 11°C or below.
b. Resetting heater STOP condition
1. When the outdoor air temperature exceeds entry condition (2°C)
2. When the discharge temperature exceeds entry condition (5°C)
13.1.8 Compressor Cold Start Prohibition Control
Purpose:
- Protect compressor when poor compressor oil return at low outdoor ambient and high water temperature
condition.
Control content:
- Do not run compressor when below condition fulfilled
a. Compressor top temperature < 10°C
b. Outdoor ambient < -20°C
c. Water temperature > 40°C
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