Protection Control For Cooling Operation - Panasonic WH-ADC0309H3E Service Manual

1 .3

Protection Control for Cooling Operation

1 .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.
1 .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.
Free
25°C
Limited
19°C frequency
Compressor
stop
1
22°C
16°C