Haier HSU--12HD03/R2 Service Manual page 28

State2
State3
T s-1
T s
(4) Warm start (preventing cold wind when heating running begins,
applicable to fan-coil model))
When heating running begins, indoor fan will conduct the following fan
control:
a.If the temperature of indoor coil pipe is >23
speed;
b.If the temperature of indoor coil pipe is >38
of compressor> 4 minutes, turn to setting wind speed.
(5) Control of indoor fan under heating OFF state (applicable to fan-coil
model)
Under heating state, and the compressor cease; if the indoor coil pipeís
temperature Tp>23
(6) Defrosting control (applicable to fan-coil model)
(1).Defrosting beginning condition:
a.After the state of Tp-Tr<18
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, indoorunitís Tp <38
c.The continuous running time of the compressor exceeds 20
minutes, the temperature of indoor coil pipe decreases 1
every 6 minutes, which lasts for more than 3 times, indoor unitís
C
Tp <38 O
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, andTp <38
Defrosting will begin if one of the above conditions is met.
(2).Defrosting finishing condition:
a . If the defrosting time exceeds 9 (for 12 models)or 7 (for 07,09 models)
minutes, the original heating state will be resumed;
b. If the current of outdoor unitís compressor exceeds x.xA (different
models have different currents); defrosting will be finished if either
a or b is met.
Air Conditioner
State1
T s+3
T s+2
C, indoor fan will run in lower wind speed.
O
C is continued for 5 minutes, the
O
;
O
C, start lower wind
C or the running time
O
C
O
;
C
O
24
Edition:2006/1/10
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