Table of Contents
Advertisement
After the defrosting is finished, outdoor fan will start, 10 s later the compressor will stop, and 15 s later four ways valve will open, 5
more seconds later the compressor will start, the unit returns to normal heating operation, and indoor fan runs as anti-cold wind
mode
c)
Defrosting entering temperature and heating internal time will auto-adjusted by outdoor defrosting time
d)
Defrosting time sequence drawing
Intelligent defrosting function(only in the case of outdoor coil is damaged this function is carried out)
Entering conditions
On the condition of running intelligent defrosting operation, one of following 7 conditions is satisfied (As for secondary condition
in upper condition, it is only valid that all secondary condition be satisfied at the same time)
a) Condition No.1
①The outdoor fan enters into over-load protection and stops running.
②Outdoor fan stops running then restarts and keeps running over 10 min
③The compressor accumulating running time ≥45min
④The compressor continuous running time ≥20min
⑤TE ≤ 48℃。
b) Condition No.2
①Enter into heating mode 5 min later or finish defrosting 5 min later, catch the max difference value between TE and TA
If TE≥38℃，when the difference between TE and TA decrease by 5℃ or more and lasting time ≥3min
If the difference between TE and TA decrease by 3℃ or more and lasting time ≥3min
②The compressor continuous running time ≥5min
③The compressor accumulating running time ≥45min
④TE ≤ 48℃；
Note: If there is wind modification, and when indoor fan wind speed descends 1 grade, temperature modification
CONTROL SYSTEM
24 | S e r v i c e M a n u a l
Advertisement
Table of Contents
