TCL FMA-32I4HD/DVO, Руководство по обслуживанию, Страница: 7 / 41

Air Conditioner Service Manual
6
seconds since the stop of compressor.
2)
Auto fan control (heating)
In heating mode (include in “feel” mode) , fan speed is determined by
δ
t as the following:
(3)
4-way valve control
In heating mode, 4-way valve will power on ahead of compressor for
8
seconds, and cut off
for 2 minutes later than compressor. 4-way valve will not power off unless the machine to be
switched off, mode changed or on the process of defrosting.
(4)
Outdoor fan motor control
In heating mode, the outdoor fan motor will power on ahead of compressor 5 seconds, and
cut off for 30seconds later than compressor.
(5)
Defrosting
Defrosting is controlled by the microprocessor.
When the unit operate 30 minutes accumulated and the compressor operation more than 3
minutes continuously, one of the following conditions is satisfied, unit comes into defrosting:
a.
When FrostDeg ≥ -5
℃ , and
OPT ≤ -5
℃ ,
the .2 times defrosting interval time is 45 minutes.
b.
When -10
℃
≤ FrostDeg < -5
℃ , and OPT
< FrostDeg , the .2 times defrosting interval time is
45 minutes.
c.
When -13
℃
≤ FrostDeg < -10
℃ , and OPT
< FrostDeg , the .2 times defrosting interval time is
45 minutes.
d.
When -15
℃
≤ FrostDeg < -13
℃ , and OPT
< FrostDeg , the .2 times defrosting interval time is
65 minutes.
e.
When -15
℃
≤ FrostDeg < -10
℃ , and OPT
< FrostDeg , the .2 times defrosting interval time is
75 minutes.
f.
When FrostDeg < -15
℃ , and OPT
< -15
℃
, the .2 times defrosting interval time is 75 minutes.
FrostDeg = C*OAT-α
OAT: Outdoor environment temperature.
When OAT< 0
℃ , C=0.8, when OAT
≥ 0
℃ , C=0.6
α=8
Before the air con comes into defrosting, compressor running frequency drop down to a
RT-ST
δt come down
δt come up
℃
4.0
3.0
1.5
1.0
High fan
Min fan
Low fan
3S
5S
30S
120S
ON
OFF
ON
ON
OFF
OFF
4-WAY valve
Outdoor fan motor
Compressor
5S
30S
ON
ON
OFF
OFF
Outdoor fan motor
Compressor