AUKS AFC-1000CF/4, Technical Manual

Page: 47 / 60

Service Manual
47
with AUKSiliary electric heater turned off when using single electric heater;
5.When TA-TS≥2
℃
, the indoor fan will be turned off 30 seconds after the cooling electric valve is closed.
The low speed operation of the indoor fan will be activated 40 seconds after 5 minutes, if TA-TS≥2 ℃
the indoor fan will remain stopped for 5minutes before reactivate low speed operation for 40 seconds;
otherwise, the related heating operation will be controlled according to indoor temperature
（
TA
）
and set
temperature
（
TS
）
.
6.Automatic air speed control:
When TA-TS≤-2
℃
, the AUKSiliary electric heater will be turned on;
When TA-TS≤-1 ℃ , the cooling electric valve will open and the indoor fan will operate at high speed ,
with electric heater turned on when using single electric heater;
When TA=TS, the indoor fan will operate at middle speed , with the AUKSiliary electric heater turned off;
When TA-TS≥1
℃
, the cooling electric valve will close and the indoor fan will operate at low speed , with
electric heater turned off when using single electric heater;
When TA-TS≥2
℃
, the indoor fan will be turned off. The logic control map is as shown in Figure 5.
The low speed operation of the indoor fan will be activated 40 seconds after 5 minutes, if TA-TS≥2 ℃ is
satisfied ,the indoor fan will remain stopped for 5minutes before reactivate low speed operation for 40
seconds; otherwise, the related heating operation will be controlled according to indoor temperature
（
TA
）
and set temperature
（
TS
）
.
1
-1 T
set
2
-2
Low speed
Setting speed
Setting fan speed
Auto fan speed
High speed
Low speed
AUKSiliary
heating closes
AUKSiliary
heating opens
Fan motor stops
Heating electric valve opens
Heating electric closes
Middle speed
Single electric
heater opens Single electric
heater closes
Heating electric valve opens
AUKSiliary heating opens
Single electric
heater opens Single electric
heater closes AUKSiliary
heating closes
Fan motor stops
Heating electric closes
(Figure5)
7.When the unit is turned on under heating mode, the cooling valve and indoor fan will open with the
electric heating performed by the control unit. The logic control map is as shown in Figure 6.
OFF
Heating electric valve
OFF
ON
Motor of indoor unit
Electric heater
OFF
ON
ON
(Figure6)
8.When the unit is turned off under heating mode , the cooling valve and indoor fan will close with the
indoor fan switched to low speed operation and then turned off 30 seconds after the electric heating is
turned off. The logic control map is as shown in the Figure 7.