Service manual

25
≤3
80
（2）end defrost condition(meet one of follows)
a、defrost time have fifteen minutes.
b、defrost relay turn on；（＞8℃）
c、press ON/OFF key in defrost process.
3. Outdoor sensor for defrost
① unit start defrost shall meet one of the following conditions：
a. compressor cumulate running time over 30 minutes and it continuous running over 3 minutes, the
temperature of coil pipe of the outdoor units is equal to or less than －15℃ for one minutes (Tp
2
≤-15℃).
b. compressor cumulate running time over 40 minutes and it continuous running over 3 minutes, the
temperature of coil pipe of the outdoor units is equal to or less than －5℃ for one minutes (Tp
2
≤-15℃).
c. Air conditioner first power on or it wait over 30 minutes ,the temperature of coil pipe of the outdoor units is
equal to or less than －2℃ (Tp
2
≤-15℃)
②end defrost condition(meet one of follows)
a. the temperature of coil pipe of the outdoor units is more than 15℃ (Tp
2
≥-15℃).
b. defrost time have fifteen minutes.
compr essor
out door
bl ower f an
door
bl ower f an
TP2
Tr