Service Manual -
B-VMHxxAV-1
Troubleshooting 7
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
Display
Remark
00
Normal display
Displays 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)
GA algorithm models display “--”
02
The frequency after the
capacity requirement adapter
03
Room temperature (T1)
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”.
04
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”. If the indoor unit is not
connected, the digital display tube will show: “--”
05
Condenser pipe temp.(T3)
06
Outdoor ambient temp.(T4)
07
Compressor discharge temp.
(TP)
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)
08
AD value of current
The display value is a hex number.
For example, the digital display tube shows “Cd”, it means AD
value is 205.
09
AD value of voltage
10
Indoor unit running mode code Standby:0,Cooling:1, Heating:2, Fan only 3, Drying:4, Forced
cooling:6, Defrost:7
11
Outdoor unit running mode
code
12
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.)
Summary of Contents for Comfort-Aire Century A-VMH18SV-1
Page 30: ...Service Manual B VMHxxAV 1 ...
Page 37: ...Service Manual B VMHxxAV 1 Outdoor Unit 3 3 Panel Plate X430 Square grille ...
Page 38: ...Service Manual B VMHxxAV 1 Outdoor Unit 4 4 Panel Plate D30 Square grille ...
Page 39: ...Service Manual B VMHxxAV 1 Outdoor Unit 5 5 2 Service Place Minimim 4 Recommended 12 ...
Page 42: ...Service Manual B VMHxxAV 1 Outdoor Unit 8 8 A VMH18SV 1 A VMH24SV 1 ...
Page 45: ...Service Manual B VMHxxAV 1 ...
Page 103: ...Service Manual B VMHxxAV 1 Troubleshooting 15 ...