Service Manual

20
T4
A+
A
B
C
D
E
8.4.2.3 Indoor fan running rules
In cooling mode, indoor fan runs all the time
and the speed can be selected as high,
medium, low and auto.
The indoor fan is controlled as below:
Setting fan
speed
Actual fan speed
H+(H+=H+G)
A H（=H）
B
C
M+(M+=M+Z)
D M(M=M)
E
F
L+(L+=L+D)
G L(L=L)
H
I
T1-Td ℃(°F)
L
L-(L-=L-D)
H
H-（H-=H-G)
M
M-(M-=M-Z)
The auto fan acts as below rules:
a
b
c
d
T1
e
8.4.2.4 Condenser temperature protection
TP3+5
T3
Resume
Off
Decrease
TP3
TP3-3
Hold
---TP3<T3< TP3+5, the compressor frequency
will decrease to the lower level until to F1 and
then runs at F1.If TP3-3<T3< TP3, the
compressor will keep running at the current
frequency.
---T3< TP3-3, the compressor will not limit the
frequency and resume to the former frequency.
---T3> TP3+5 for 5 seconds, the compressor
will stop until T3< TP3-3.
8.4.2.5 Evaporator temperature protection
When Evaporator temperature temp.is less
than setting value, the compressor will stop.
8.4.3 Heating Mode
8.4.3.1 Compressor running rules
When T1-Ts>- T, the compressor will stop,
when T1-T
S
< T-1.5，the compressor will be on.
 T is the programmed parameter of
temperature compensation.
When the AC run in mute mode, the
compressor will run with low frequency.
When the current is more than setting value,
the current protection function will be activated
and the compressor will stop.
8.4.3.2 Outdoor fan running rules
The outdoor unit will be run at different fan
speed according to T4.
For different outdoor units, the fan speeds are
different.