Midea Super DC Series, Service Manual

Page: 169 / 229

Electrical Control Function
Electrical Control System 167
a
b
c
d
T 1 - T d
e
H
( H - L ) * 0 . 7 5 + L
( H - L ) * 0 . 5 + L
( H - L ) * 0 . 2 5 + L
L
1.3.2.3 Evaporator Low Temperature T2 Protection.
---T2<0
℃
, the compressor stops and restarts only when T2
≥
5
℃
.
---0
℃
≤T2<4
℃
, the compressor frequency is limited and decreases to a lower level
---4
℃ ≤T2<7 ℃
, the compressor maintains its current frequency.
---T2>7
℃
, the compressor frequency is not limited.
1.3.2.4 High Condenser Coil Temperature Protection
12K 16~60K
T 3
I n c r e a s e s lo w ly
O ff
D e c r e a s e
H o ld
R e s u m e
1.3.3 Heating M ode
1.3.3.1 Outdoor Fan Running Guidelines
12K
Fan speed is regulated according to T4 and compressor frequency.
T 4
A
A +
F r e q u e n c y l in k a g e a r e a
Frequency linkage area:
T 3
R e s u m e
O ff
D e c r e a s e
H o ld