CONTROL SPECIFICATION
1
1
2
2
ABBREVIATION
ST: Setting Temperature
PT: Indoor coil Pipe Temperature
RT: Room Temperature
OT: Outdoor coil pipe temperature
OPERATION OF MAIN BOARD
COOL MODE
The ST at cool mode is adjustable within16 -31
.
When RT ST, both the compressor and the outdoor fan start;
When RT<ST-1
, the compressor stops and 18 seconds later, the outdoor fan will stop.
But the indoor fan keeps running at predetermined speed.
Once turning on the unit while set at cool mode, the indoor fan immediately runs at
predetermined speed; if all the conditions meet with the requirement of compressor
operation, both the outdoor fan and compressor start running. If not, either the outdoor
fan or compressor could start.
The four-way valve keeps being off all the time at cool mode.
If the horizontal air flow louver is set at low angle on COOL mode, after a while, it will auto swing to
its maximum angel for system protection. 3 minutes later, the horizontal air flow louver will resume
to its original position.
Condensate dew prevention
Anti-ice function
When PT=2
, the compressor does not stop and indoor fan runs at high speed.
When PT
-1
for 1 minute, the compressor and outdoor fan stop and indoor fan runs at
high speed.
When PT
8
for 5 minutes, anti-ice protection deactivates, both the compressor and the
outdoor fan start operation.
OFAN: Outdoor fan
IFAN: Indoor fan
COMP: Compressor
5 mins
3 mins
8
2
-1
OFAN
COMP
IFAN
ON
ON
Set speed
Set speed
ON
ON
ON
OFF
OFF
High speed
17
