Led Display On Frequency Conversion Pc Board; Switching Function Of Interface Pc Board - Haier AU96NFTAHA Service Manual

6. LED display on inverter PCB
According to the position of SW01, the 4 LED (D25~D28) of frequency conversion can express the following content:
(1) If the LED displaying <IGBT short circuit> protection has no abnormal locking, when shortening time, it will
flicker in 5 Hz frequency.
(2) When conducting protection action, the LED displaying protection function will flicker in 5 Hz frequency, other
LED will be lighted.
For example: IGBT short
circuit protection action
Current detection circuit
protection action
(3) Do not display the number of protection action of high pressure
SW01
1 2
IGBT short circuit
protection action
OFF OFF
ON OFF
Serial receiving Sx (frequency data)
OFF ON
Serial transmitting Sy (frequency data)
ON ON
: Lamp ON
7. Switching function of I/F PCB
Switch No. Type of switch
SW01
16-digit knob switch (0~15)
SW02
16 digit knob switch (0~15)
3-digit dial switch
SW03
SW04 Micro switch
SW05 Micro switch
3-digit dial switch
SW06
(see page 115,116)
1-digit dial switch
SW07
Note: 1. is the position of delivery 2. In this system, SW07 is fixed on side of OFF, do not change it into
the side of ON.
D25 D26 D27
D25 D26
Compressor
protection action
Current detection
circuit protection
action
No
: Lamp OFF
Displaying switching (1)
Displaying switching (2)
Back up running of
inverter compressor ON: back up running
1
Back up running of
commercial
2
compressor
Selectable function
3
switching
"Running" for
maintenance
"stopping" for
maintenance
Pd sensor back up
1
running
Ps sensor back up
2
running
Not used
3
Indoor indicates
switching
D28
D27
Overcurrent
protection action
Counter of protection action
Normal
: Flicker in 5 Hz : Flicker in 1 Hz
Function
7-segment nixie tube display switching
7-segment nixie tube display switching
ON: back up running OFF: usual running
ON: requiring control OFF: Snowfall pr-
If pressed down, indoor unit runs
If pressed down, indoor unit stops
ON: back up running OFF: usual running
ON: back up running OFF: usual running
ON:
ON: 17~30
99
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D28
High pressure
switch action
Protection action
OFF: usual running
eventing fan control
OFF:
OFF: 1~16