24
8.7.3 After starting, the operation frequency of compressor submits to following rule:
When the machine runs, if
ΔTh stays in a zone for 3 minutes, action of frequency is as follow:
Zone A: Elevate current frequency one grade, and not stop until the maximum grade.
Zone B: Elevate or keep or descend current frequency.
Zone H: Compressor stops after running with F1 for 60 minutes or
when ΔTh
＞
6
℃
.
8.7.4 Outdoor unit current control in heating mode.
8.7.5 Indoor heat exchanger high temperature protection.
If T2
＞
60
℃
, the compressor will stop and not resume until T2
＜
48
℃
.
8.7.6 Defrosting mode
Condition of defrosting.
Condition 1: If T4
＞
0
℃
,
When the units are running, if the following two items are satisfied the units start defrosting:
The units runs with T3
＜
3
℃
for 40 minutes and T3 keeps lower than -6
℃
for more than 3 minutes.
The units runs with T3
＜
3
℃
for 80 minutes and T3 keeps lower than -4
℃
for more than 3 minutes.
Condition 2: If T4
＜
0
℃
,
The program judges according to the condition 1, if the two items are satisfied, then judges if T2 has descended for more
than 5
℃
, if it has the machine starts defrosting, or continues to judge T2 and will not defrost until T2 drops more than 5
℃
.
Condition 3:
No matter what value T4 is, if the machine runs with T3
＜
3
℃
for more than 120 minutes and T3 keeps
lower than -2
℃
for more than 3 minutes, the machine will defrost, no matter if T2 drops for more than 5
℃
or not.
Condition of ending defrosting.
If any one of following items is satisfied, defrosting will finish and the machine will turn to normal heating mode.
T3 rises to be higher than 12
℃
.
T3 rises to be higher than 8
℃
and remains for 80 seconds.
Remark: ΔTcon can be changed among 0, -2,- 4
℃
, the
default is 0
℃
.
A
5.0
4.5
1.0
0.5
H
B
℃
Δ
Th
=(
ro
o
m
te
m
p
)
–
(s
e
tti
n
g
T
e
m
p
)
–
Δ
T
c
o
n
I3HEAT
I2HEAT
I1HEAT
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
o
u
td
o
o
r u
n
it
c
u
rre
n
t
