Troubleshooting
Page 48
5. Outdoor Unit Point Check Function(For Some Outdoor Unit)
• A check switch is included on the outdoor PCB(For Some Outdoor Unit).
• Push SW1 to check the unit’s status while running. The digital display shows the following codes each time the SW1
is pushed.
• When the point check function display number reaches “30”, press SW1 again, then return to the normal display or
fault display 0.
Number of
Presses
Display Remark
00 Normal display Display running frequency, running state or malfunction code
01 Indoor unit capacity demand code
Actual data*HP*10
If capacity demand code is higher than 99, light the decimal point of the high
digit tube. (For example, the digital display tube show “5.0”,so 5.0 multipled
by 10 to become 50, then added to 100 to become 150, so actual capacity
demand=150/10=15. the digital display tube show “60”,so actual capacity
demand=60/10=6.0)
Current loop communication models display “--”
02 Amendatory capacity demand code
03
The frequency after the capacity
requirement transfer
04 The frequency after the frequency limit
05 The frequency of sending to 341 chip
06 Indoor unit evaporator temperature(T2)
If the temp. is lower than -9 degree, the digital display tube will show “-9”.If
the temp. is higher than 70 degree, the digital display tube will show “70”.
07 Condenser pipe temp.(T3)
08 Outdoor ambient temp.(T4)
09 Compressor discharge temp.(TP)
The display value is between 0~199
o
C. If the temp. is lower than 0
o
C, the
digital display tube will show “0”.If the temp. is higher than 99
o
C,light the
decimal point of the high digit tube. (For example, the digital display tube
show “0.5”,so 0.5 multipled by 10 to become 5, then added to 100 to
become 105
o
C.)
10 AD value of current The display value is hex number.
For example, the digital display tube shows “Cd”, so
C*161+d*160=12*16+13=205, it means AD value is 205.
11 AD value of voltage
12 Indoor unit running mode code 485 communication models: Standby:0, Fan only: 1,Cooling:2, Heating:3,
Forced cooling:4, Drying:6, Self clean:8
Current loop communication models: Standby:0, Cooling:1, Heating:2, Fan
only: 3, Drying:4,Forced cooling:6, Defrosting:7
13 Outdoor unit running mode code
14 EXV open angle
Actual data/4.
If the value is higher than 99, light the decimal point of the high digit tube.
For example, the digital display tube show “2.0”,so 2.0 multipled by 10 to
become 20, then added to 100 to become 120,it means the EXV open angle
is 120×4=480p.)
15 Frequency limit symbol
Bit7
Frequency limit caused by IGBT
radiator
The display value is a hex
number. For example, the
digital display show 2A,
the corresponding binary is
101010, so Bit5=1, Bit3=1,
and Bit1=1.
It means frequency limit
caused by high temperature
of T2, T3 and current.
Bit6 Frequency limit caused by PFC
Bit5
Frequency limit caused by high
temperature of T2.
Bit4
Frequency limit caused by low
temperature of T2.
Bit3 Frequency limit caused by T3.
Bit2 Frequency limit caused by TP.
Bit1 Frequency limit caused by current
Bit0 Frequency limit caused by voltage
16 DC fan motor speed 0:off 1:Turbo 2:High 3:Medium 4:Low 5: Breeze 6:Super breeze
17 IGBT radiator temp.
The display value is between 0~130
o
C. If the temp. is lower than 0 degree, the
digital display tube will show “0”.If the temp. is higher than 99 degree,light
the decimal point of the high digit tube. (For example, the digital display
tube show “0.5”,so 0.5 multipled by 10 to become 5, then added to 100 to
become 105
o
C.)
18 Indoor unit number
The indoor unit can communicate with outdoor unit well.
General:1, Twins:2
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