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14.2. Protection Control For Heating Operation
14.2.1. Outdoor Air Temperature Control
The maximum current value is regulated when the outdoor air temperature rises above 14°C in order to avoid compressor
overloading.
14.2.2. Deice Operation
When outdoor pipe temperature and outdoor air temperature is low, deice operation start where outdoor fan motor stop.
14.3. Protection Control For Cooling Operation
14.3.1. Outdoor Air Temperature Control
• The Compressor operating frequency is regulated in accordance to The outdoor air temperature as shown in The diagram below.
• This control will begin 1 minute after the compressor starts.
• Compressor frequency will adjust base on outdoor air Temperature.
14.3.2. Freeze Prevention Control 1
1. When indoor heat exchanger temperature is lower than 0°C continuously for 10 seconds, compressor will stop operating.
2. Compressor will resume its operation three minutes after the indoor heat exchanger is higher than 1°C.
3. Indoor heat exchanger freeze prevention (H99) will memory in error history.
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