GE PRO AIR 107, Service Manual

Page: 34 / 104

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33
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Suitable to systems except for PRO AIR I109 IN / PRO AIR I109 OUT PRO AIR I112 IN / PRO AIR I112
OUT frequency converter
Function manual of remote controller
7.2.1 Temperature parameter
‹ Room set temperature: (T
set
)
‹
Room ambient temperature (T
amb
)
7.2.2 Basic function of the system
No matter what mode the compressor is in, the minimum time interval between two startups should be 3
minutes after it is powered on.
7.2.2.1 COOL mode
7.2.2.1.1 Running condition and process of cooling
If T
amb
≥ T
set
+1 ℃ , COOL mode will act, compressor and outdoor fan will run, the indoor fan will run at the
set speed;
If T
amb
≤
T
set
-1
℃
, the system enters stop mode. In this case, the compressor will stop first, and the
indoor/outdoor fans will stop after a delay of 15s.
If T
set
-1
℃
＜ T
amb
＜ T
set
+1
℃
, the unit will keep running in the previous mode.
¾ In this mode, the reversal valve will not be powered on and the temperature setting range is 16
℃
~30
℃
T
amb
T
set
+1 ℃
T
set
+2 ℃
≥
3 min
Compressor
Outdoor fan
Indoor fan Set fan spee
d
Set fan spee
d
Start cooling
Original running state
Stop cooling
Run Stop
7.2.2.1.2 Protection function
‹
Anti-freezing Protection
When system anti-freezing protection is detected, the compressor and outdoor fan stop running, and the
indoor fan runs at the preset speed. When anti-freezing protection is eliminated and compressor has
stopped for 3min, the machine restores its former operation mode.
Anti-freezing Protection
Compressor ≥ 3min
Outdoor fan
Indoor fan Set fan speed
Run Stop
‹
Over current protection
When the system current is detected to be higher than the specified value for 3 consecutive seconds, the
system will enter the operation mode of fan only. After 3 minutes, the system resumes back to the original
running mode. If the over current protection is detected for three times consecutively in 30 minutes, the
system will stop running and it is required to turn on the system with remote controller.
7.2.2.2 Dry mode
7.1.2.2.1 The condition and process of dry mode
If T
amb
>T
set
+2 ℃ , the cooling mode will act. The compressor and external fan will run, and the indoor fan
will run at an adjustable speed.
7.2