Midea MOU-12HDN1, Service Manual

Page: 91 / 138

MLCAC-UTSM-2010-10 Point Check Function
Outdoor Units 87
8.
Point Check Function
There is a check switch in outdoor PCB.
Push the switch SW1 to check the states of unit when the unit is running. The digital display tube will display
the follow procedure when push SW1 each time.
For units except model MOU-12HDN1:
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, 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)
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
06 Indoor unit evaporator outlet temp.(T2)
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”.
07
Condenser pipe temp.(T3)
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:
“――”
08
Outdoor ambient temp.(T4)
09
Compressor discharge temp.(Tp)
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 compressor discharge
temp. is 105 degree. the digital display tube show “1.6”,it
means the compressor discharge temp. is 116 degree)
10 AD value of current
The display value is hex number.
11 AD value of voltage
12
Indoor unit running mode code
Off:0, Fan only 1,Cooling:2, Heating:3, Forced cooling:4
13 Outdoor unit running mode code
14
EXV open angle
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.)
15
Frequency limit symbol
Bit7
0
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.
Bit6
0
Bit5
Frequency limit
caused by T4.
Bit4
Frequency limit
caused by 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