HSU-09/12H03/R(QXF) Functions and control
12
Domestic Air Conditioner
Warm start
Control of indoor
fan under heating
OFF state
Defrosting
control
State1
State2
State3
Ts-1 Ts Ts+2 Ts+2
When heating running begins, indoor fan will conduct the following fan control:
ķ If the temperature of indoor coil pipe is 23ć, start lower wind speed;
ĸ If the temperature of indoor coil pipe is 38ć or the running time of
compressor 4 minutes, turn to setting wind speed.
Under heating state, the compressor will cease; if the indoor coil pipe’s
temperature Tp23ć, indoor fan will run in lower wind speed ; if the coil pipe’s
temperature Tp<21ć,indoor fan will cease
ķ Defrosting beginning condition:
a. After the state of Tp-Tr<18ć is continued for 5 minutes, the accumulated running
time of the compressor exceeds 45 minutes, the continuous running time of the
compressor exceeds 20 minutes;
b. The accumulated running time of the compressor exceeds 3 hours, the
continuous running time of the compressor exceeds 20 minutes, indoor unit’s Tp <42ć;
c. The continuous running time of the compressor exceeds 20 minutes, the
temperature of indoor coil pipe decreases 1ć every 6 minutes, which lasts for more than
3 times, indoor unit’s Tp <42ć;
d. When the indoor unit is in the state of overload protection and the outdoor unit
ceases, when the rerunning time of outdoor unit exceeds10 minutes, the accumulated
running time of the compressor exceeds 45 minutes, the continuous running time of
the compressor is over 20 minutes, and Tp <42ć.
Defrosting will begin if one of the above conditions is met.
ĸ Defrosting finishing condition:
If the defrosting time exceeds 9 (for 12 models)minutes ,the original heating state will
be resumed;
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