Haier R Series Service Manual page 15

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