Outdoor Unit Point Check Function - Mars Comfort-Aire Century VCD-SA Series Service Manual

3. Outdoor Unit Point Check Function

• A check switch is included on the outdoor PCB.
• Push SW1 to check the unit's status while running. The digital display shows the following codes each time the SW1
is pushed.
Number of
Presses
00 Normal display
Indoor unit capacity demand
01
code
The frequency after the
02
capacity requirement adapter
03
Room temperature (T1)
Indoor unit evaporator
04
temperature (T2)
05
Condenser pipe temp.(T3)
06 Outdoor ambient temp.(T4)
Compressor discharge temp.
07
(TP)
08
AD value of current
09 AD value of voltage
10 Indoor unit running mode code
Outdoor unit running mode
11
code
12
EXV open angle
Display
Displays running frequency, running state, or malfunction code
Defrosting mode: "dF" or alternative displays between running
frequency and "dF" (ach appears for 0.5s.)
Forced cooling mode: the LED displays "FC" or alternative
displays between running frequency and "FC" (each appears
for 0.5s).
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)
GA algorithm models display "--"
If the value is higher than 99, the digital display tube will show
single digit and tens digit.
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 0~199 degree. If the temp. is
lower than 0 degree, the digital display tube will show "0".
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 a hex number.
For example, the digital display tube shows "Cd", it means AD
value is 205.
Standby:0,Cooling:1, Heating:2, Fan only 3, Drying:4, Forced
cooling:6, Defrost:7
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.)
 Troubleshooting 7
Service Manual - VCDxxSA
Remark
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