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Technical Information
Service Manual
3.7 Setting button function
a) ON/OFF button: It controls systems switch.
b) Mode button: Mode setting cycle with below sequence: Cooling only unit: cooling-> dry-> fan.
c) Temp. ▼ button: Set temperature when the unit is on, the setting temperature decreases 1
o
C or
o
F per press
Temp. ▼ button; it will never setting when the setting reaches to 16
o
C or 61
o
F. The button is not valid under auto, dry and fan mode.
d) Temp. ▲ button: Set temperature when the unit is on, the setting temperature increases 1
o
C or
o
F per press
Temp. ▲ button; it will never setting when the setting reaches to 30
o
C or 86
o
F. The button is not valid under auto, dry and fan mode.
3.8 Light Control
If set the light is on with remote control, the indicator lamp and dual-8 display the current setting status; if set the
light is off with remote control, turn off the lamp immediately. If there is front panel button or remote control button
operation when setting light off with remote control, the indicator lamp and dual-8 display current setting status,
and turn off the light 5S later. Remote control light button does not controlled by failure display.
3.9 Protection Function
● Anti-freeze Protection
When the anti-freeze protection is inspected, the compressor stops, fan motor runs with setting fan speed.
When the anti-freeze protection is canceled and reaches to the 3min time-delay, it runs with the original status.
Temperature sensor failure inspection
a) Environment temperature sensor is open, short circuit: dual-8 displays F1, and it will light up 0.5S and go out 0.5S when it is
blinking.
b) Indoor pipe temperature sensor is open, short circuit: dual-8 displays F2, and it will light up 0.5S and go out 0.5S when it is
blinking.
c) Outdoor pipe temperature sensor is open, short circuit: dual-8 displays F4, and it will light up 0.5S and go out 0.5S when it is
blinking.
d) The compressor or electric heating pipe stops when the temperature sensor failure and the unit is on, The fan motor will be deal
regarding compressor or electric pipe reach to the temperature point and stops.
● Over-ow Protection
If the over-ow is detected for 3S, it will enter into over-ow protection. Display error code H8, heating indicator lamp or over-ow
indicator lamp goes out 3S and blinks 8 times.
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