Skyline Energy SX-20BZA, Installation Manual, Page: 39 / 51

Part 2. Working modes:
1. Heating mode
◆
Water tank temp
≤
Water tank preset temp L3-Compressor restart temp drop setting L2, start
to heat.
◆
Water tank temp
≥
water tank preset temp L3, stop heating.
2. Defrost mode
： ： ： ：
2.1 Conditions of entering defrost when heating
：
： ：
：
◆
Ambient temp
≤
H8 value
，
and air heat exchanger lowest tube temp
≤
H4 value, and lasts for
≥
3min
；
◆
Compressor total working time
≥
H2 value
，
and lasts for
≥
5min
◆
(Ambient temp
－
Air heat exchanger lowest tube temp)
≥
preset temp H7
，
and lasts for
more than 30sec.
When heating, when all of above conditions are met, system will enter defrost.
2.2 Conditions of quitting defrost when heating
： ： ： ：
When air heat exchanger lowest tube temp
＞
H6 value, or defrosting time reach H5, system
quit defrost.
2.3 Defrost running
：
： ：
：
①
When defrost entering conditions are met, will work as below:
◆
Compressor and fan motor stop working.
◆
At 30sec, four way valve get electricity, electric heater start.
◆
At 60sec, compressor starts.
②
When defrost quitting conditions are met, will work as below:
◆
Compressor stop working