Electrical Control Function (Air Handler)
Electrical Control System
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active).
2.4 Fan Only Mode
2.4.1 When the unit is in fan only mode, the outdoor fan and compressor are off.
2.4.2 On the wired controller, “Mode” switch is in “OFF” position and “Fan” switch is in “ON” position.
2.4.3 The control sketch is as following:
2.5 Indoor PCB Display
There are 3 LEDs on indoor PCB, which can display some information.
2.5.1 When the unit is initial electrified, all LED will flash for 1 second. When the unit is standby, LED1 will
flashes at 0.5 Hz. When the unit is running normally, LED1 will be always on and LED2, LED3 are off.
2.5.2 When there is an error, these LEDs will display as following:
No
Information
LED1
LED2
LED3
Recover when
1
T2 sensor fault
X
☆
X
T2 is normal
2
Input signal of wired controller error
☆
X
☆
Input is right
（
X means “OFF”,
☆
means “flash at 5 Hz”
）
R
G
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