Airwell 7SP091170, Service Manual

Page: 111 / 151

Electrical Control Function
Electrical Control System 109
The auto fan acts as below rules:
a
b
c
d
5.0
4.0
2.5
1.0
6.0
T1-Ts
e
H
(H-L)*0.75+L
(H-L)*0.5+L
(H-L)*0.25+L
L
1.3.2.4 Condenser temperature protection
When T3>65
℃
for 3 seconds, the compressor will stop while the indoor fan and outdoor fan will continue.
When T3<52
℃
, the protection will release and the compressor will restart after 3 minutes.
1.3.2.5 Evaporator low temperature protection
When T2B<0
℃
for 250 seconds, the indoor unit has no capacity demand and resume till T2B>10
℃
.
When T2<4
℃
, the indoor has no capacity demand and resume till T2>8
℃
.
1.3.3 Heating Mode
1.3.3.1 Compressor running rules
The compressor will run at corresponding frequency according to the gross amendatory capacity demand.
Frequency 0 HEAT_F1 HEAT _F2
……
HEAT_F15 HEAT _F16
Amendatory capacity demand. 0 1 2
……
15 16
1.3.3.2 Outdoor fan running rules: