Commercial Air Conditioner
Model: AU182AFERA
AD182AMERA, AS182AVERA
1. Temperature adjustment function
1.1 In this function, outdoor running frequency depends on the indoor temperature and the set
temperature.
1.2 In auto mode, indoor fan speed will be changed according to the request of temperature
adjustment.
1.3 In heating operation, indoor fan speed will be controlled according to the coil temperature.
1.4 Defrosting
In heating mode, outdoor transfers the defrosting signal to indoor unit, then indoor unit will enter
defrosting mode until outdoor transfers defrost-cancelling signal, then indoor unit will enter
heating mode. In defrosting, there is no over load protection.
1.5 Air flow limitation
When compressor is running, the air flow of indoor fan motor and the limited frequency are as
follow:
Frequency-limited
variable Limited
frequency
Air flow (Med)
FQLIMMD
90Hz
Air flow (Low)
FQLIMLO
52Hz
Healthy mode
FUPHEAL
30Hz
2. Indoor fan motor control
2.1 If air flow is adjusted by hand, the target rotation is (High+Low)/2.
If air flow is adjusted automatically, the target rotation is (Auto High+Auto Low)/2, it will not be
counted if being below 10rpm.
2.2 Heat operation
2.2.1 Hot start up
In heating, anti-cold air control is as the following chart:
Heat exchanger temp.
THHOT3
37.0
℃
THHOT2
35.2
℃
THHOT1
25.2
℃
4minutes
THHOT0
23
℃
stop ultra low low set value low ultra low stop
According to the heat exchanger temperature, fan motor will be controlled due to the above
chart.
1) When heat exchanger temp. rises up, adjust the fan speed due to the heat exchanger temp.
If heat exchanger temp. is below 35.2
℃
, fan speed is ultra low (When being electrified for the
first time, enter heating mode or defrosting is over, if heat exchanger temp. is below 25.2
℃
, fan
motor stops; if higher than 25.2
℃
and lower than 35.2
℃
, fan speed is ultra low);
If heat exchanger temp. is between 35.2
℃
and 37
℃
, fan speed is low;
If heat exchanger temp. is higher than 37
℃
, fan motor will run at set speed.
2) When heat exchanger temp. reduces, adjust the fan speed due to the heat exchanger temp.
If heat exchanger is below 35.2
℃
and over 25.2
℃
, fan speed is low;
If heat exchanger is below 25.2
℃
, fan speed is ultra low, and remain the state (When being
Wall mounted unit electric functions:
-64-