Mars Comfort-Aire Century VCD-SA Series Service Manual page 111

Service Manual - VCDxxSA
13 Frequency limit symbol
14 Outdoor unit fan speed
The average value of the
temperature values detected
by the high and low pressure
15
sensors in the last 10 seconds
of the compressor frequency
calculation period
The temperature value
16 detected by the high and low
pressure sensor
AD value detected by the high
17
and low pressure sensor
The currently running
18
communication protocol
version
Frequency limit caused by
Bit7
IGBT radiator
Bit6 Reserved
Bit5 Reserved
Frequency limit caused by low
Bit4
temperature of T2.(LH00)
Frequency limit caused by
Bit3
T3.(LC01)
Frequency limit caused by
Bit2
TP.(LC02)
Frequency limit caused by
Bit1
current(LC03)
Frequency limit caused by
Bit0
voltage (LC05)
If it 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 fan speed is 120.) This value is multiplied by
8, and it is the current fan speed: 120*8=960
The displayed value is the actual value plus 60 (that is, when
the displayed value is 10, the actual value is -50). When the
displayed value is higher than 99, the digital display tube will
show single digit and tens digit. (if it displays 2.0, it means
120)
When there is no pressure sensor, it is displayed as --
The display value is a hex number.
For example, the digital display tube shows "Cd", it means AD
value is 205.
When there is no pressure sensor, it is displayed as --
00-99
 Troubleshooting 8
The display value is
a hex number. For
example, the digital
display show 2A, then
Bit5=1, Bit3=1, and
Bit1=1.
This means that a
frequency limit may be
caused by T4, T3, or
the current.
