Midea MCD-18HRFN1-QRC4 Service Manual page 115

N
00 Normal display
01 Indoor unit capacity demand code
02 Amendatory capacity demand code
The frequency after the capacity requirement
03
transfer
04 The frequency after the frequency limit
05 The frequency of sending to 341
Indoor unit evaporator outlet temp.(heating T2，
06
cooling T2B)
07 Condenser pipe temp.(T3)
08 Outdoor ambient temp.(T4)
09 Compressor discharge temp.(Tp)
10 AD value of current
11 AD value of voltage
12 Indoor unit running mode code
13 Outdoor unit running mode code
14 EXV open angle
15 Frequency limit symbol
16 DC fan motor speed
17 IGBT radiator temp.
18 Indoor unit number
19 Condenser pipe temp. of 1# indoor unit
20 Condenser pipe temp. of 2# indoor unit
Electrical Control System
Display
Display running frequency, running state or malfunction code
Actual data*HP*10
If capacity demand code is higher than 99, the digital display
tube will show single digit and tens digit. (For example, the
digital display tube show "5.0",it means the capacity demand
is 15. the digital display tube show "60",it means the capacity
demand is 6.0)
If the temp. is lower than 0 degree, the digital display tube will
show "0".If the temp. is higher than 70 degree, the digital
display tube will show "70".
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". If the indoor unit is not connected,
the digital display tube will show: "――"
The display value is between 13~129 degree. If the temp. is
lower than 13 degree, the digital display tube will show "13".If
the temp. is higher than 99 degree, the digital display tube will
show single digit and tens digit. (For example, the digital
display tube show "0.5",it means the compressor discharge
temp. is 105 degree. the digital display tube show "1.6",it
means the compressor discharge temp. is 116 degree)
The display value is hex number.
Off:0, Fan only 1,Cooling:2, Heating:3
Off:0, Fan only 1,Cooling:2, Heating:3, Forced cooling:4
Actual data/4.
If the value is higher than 99, the digital display tube will show
single digit and tens digit.
For example ,the digital display tube show "2.0",it means the
EXV open angle is 120×4=480p.)
Frequency limit
Bit7 caused by IGBT
radiator
Frequency limit
Bit6
caused by PFC
Frequency limit
Bit5
caused by T4.
Frequency limit
Bit4
caused by T2.
Frequency limit
Bit3
caused by T3.
Frequency limit
Bit2
caused by Tp.
Frequency limit
Bit1
caused by current
Frequency limit
Bit0
caused by voltage
The display value is between 30~120 degree. If the temp. is
lower than 30 degree, the digital display tube will show "30".If
the temp. is higher than 99 degree, the digital display tube will
show single digit and tens digit. (For example, the digital
display tube show "0.5",it means the IGBT radiator temp. is
105 degree. the digital display tube show "1.6",it means the
IGBT radiator temp. is 116 degree)
The indoor unit can communicate with outdoor unit well.
If the temp. is lower than 0 degree, the digital display tube will
show "0".If the temp. is higher than 70 degree, the digital
Electrical Control Function
Remark
The display value is hex
number. For example,
the digital display tube
show 2A,then Bit5=1,
Bit3=1, Bit1=1.
It means frequency limit
caused by T4,T3 and
current.
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