Gree YX1FF - Malfunction Display; Low Temperature Protection; Button Function; Users Interface Display and Button

Service Manual
Technical Information
31
buttonin the process of displaying the ambient temperature, 15s later, it will be calculated again.
1.6 Low temperature protection
Under OFF, cool, dry or fan mode, this protection can be operated by wired controller.
Entry condition: if select low temperature protection valid with dial switch (see special function), if it detects that the indoor ambient
temperature is lower than 40oF(5
o
C),air conditioner will enter into pure electric heating mode; low temperature protection will be
started up.
Exit condition: when indoor ambient temperature is increase more than 50oF(10
o
C), low temperature protection will be stopped;
2. Users interface display and button
2.1 Button function:
There are ON/OFF, WARMER, COOLER, MODE, FAN SPEED, TIMER six buttons in all;
2.1.1 In OFF mode, press the ON/OFF button to turn on the unit: In OFF mode, if pressed the WARMER or COOLER button, the “dual
8” will be turned off after displaying the indoor temperature for 15s; If pressing the MODE button in OFF mode, the controller will
resume to the running status before turning off the unit. The running LED is displaying in green color.
2.1.2 In ON status, all the buttons are in valid.
1) ON/OFF: After pressing the ON/OFF button, the unit can be switched between ON and OFF mode.
2) MODE: In ON status, after pressing the MODE button, the unit can be switched among cooling, fan, dry and heating mode
circularly; In OFF mode, after pressing the MODE button, the controller will run at the running status before turning off the unit.
3) FAN SPEED: In ON status, after pressing the FAN SPEED button, you can select the low, medium, high and auto fan speed.Only
low speed is available for dehumidify mode.
4) WARMER, COOLER:
a. In TIMER setting status, the timer can be set within 0-24 hours. In 10 hour timer, the time is adjusted every 0.5 hour by pressing
the button. In timer above 10 hour, the time is adjusted every 1 hour by pressing the button.
b. In temperature setting status, the temperature can be adjusted every 2
o
F (1
o
C). Temperature setting range is 61-86
o
F (16-30
o
C)
and you can also select other setting temperature range through conguration.
5) TIMER:
a. In the status without timer, it will enter timer setting by pressing this button.
b. In the status with timer, it can show the residual time by pressing this button.
c. Press this button to cancel timer when showing the time or setting timer.
2.2 Dual 8 Display and LED Display
Two 8 segment nixie tube and 13 LED indicators (they are HIGH, MED, LOW, AUTO, COOL, FAN, HEAT, ON/OFF, SETOPINT (set
temperature), INDOOR (ambient temperature), STATUS (status indicator on main board), SLEEP/DRY, TIMER)
2.2.1 Mode LED display: when the A/C is running in a certain kind of mode, the corresponding LED is bight.
2.2.2 Running/power LED: In ON status, the controller is in green color; In OFF status, the controller is red color.
2.2.3 Fan speed display: when the A/C is running at high, medium, low and auto fan speed, the corresponding LED is bright.
2.2.4 Under cool, dry or heat mode, the dual-8 nixie tube displays set temperature (under fan mode, the dual-8 nixie tube displays
indoor ambient temperature).
2.2.5 When the display data has three-position, the dual 8 is rolling to display. Display the “decimal” +“units place” at rst, and then
display “BLANK”+ “hundreds place”
2.2.6 Malfunction Display
After energization, STATUS LED is bright, while when theres malfunction or protection, STATUS LED will blink to display in any
circumstances.
The details are as below: priority is decreasing from 1 to 8.
No. Error Name Display Way
1
Indoor ambient temperature sensor is open circuit and short
circuit
Dual 8 displays "F1", STATUS LED blinks once and goes out
for 3s circularly
2
Indoor tube temperature sensor is open circuit and short
circuit
Dual 8 displays "F2", STATUS LED blinks twice and goes out
for 3s circularly
3
Outdoor tube temperature sensor is open circuit and short
circuit
Dual 8 displays "F4", STATUS LED blinks four times and goes
out for 3s circularly
4 FJ error of air outlet temperature sensor Dual 8 displays "FJ"
5 Low temperature protection Dual 8 displays "FP"
6 Wrong wire connection for wired controller STATUS LED blinks 9 times and goes out for 3s circularly
7 High temperature protection for evaporator STATUS LED blinks 8 times and goes out for 3s circularly
8 High temperature protection for outdoor condenser STATUS LED blinks 6 times and goes out for 3s circularly
9 Freeze protection for evaporator STATUS LED blinks 5 times and goes out for 3s circularly