Heat Mode - Airwell CADE024 Service Manual

CONTROL SYSTEM
11.3.1 Indoor Fan operation under Cool Mode
The indoor fan will run at high speed for 5 seconds before it is put into operation according to the
setting then run at the setting speed.
In Auto Fan user setting, fan speed will be adjusted automatically according to the SPT and RAT,
refer to 11.1.4
11.4

Heat Mode

If Load >0, the unit will operate in heating mode. The compressor, outdoor fan and 4-way valve will
operate and the indoor fan will delay 1'30" to start at the latest
If LoadAT≤0, the compressor will stop operation and the outdoor fan will delay 60 seconds to stop.
And the indoor fan will blow for 60s at low fan speed for cassette and floor ceiling model and at
setting fan speed for duct model. During this period, the fan speed can't be switched.
11.4.1 Indoor Fan Control in Heat Mode
Indoor fan speed depends on the indoor coil temperature
Anti-cold air function
When starting the heating mode, anti-cold air function will be activated and indoor fan can run at
low speed or stop running. This function will terminate after the unit runs for 1.5min.
Residual heat blowing function
During heating, when the stopping condition for the compressor is reached. The indoor fan will
blow for 60s at low fan speed for floor ceiling model and at setting fan speed for duct model. For
cassette unit the indoor fan will operate continuously in low fan speed until compressor restarting.
During this period, the fan speed can't be switched.
For manual OFF condition, the residual heat blowing function will last 60s for all indoor models.
11.5 Auto Cool/Heat Mode
In AUTO mode, the system selects the running mode (COOL/HEAT/FAN) automatically according
to the room temperature. The display shows the actual running mode and setting temperature.
There will be 30s delay for mode conversion.
1. When RAT≥26 degree, the cooling mode is selected.
SM YUDE 2-A.1 GB 11-5