Service Manual -
B-VMHxxAV-1
Troubleshooting 8
13
Frequency limit symbol
Bit7
Frequency limit caused by
IGBT radiator
The display value is a
hexidecimal 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.
Bit6
Reserved
Bit5
Reserved
Bit4
Frequency limit caused by low
temperature of T2.(LH00)
Bit3
Frequency limit caused by
T3.(LC01)
Bit2
Frequency limit caused by
TP.(LC02)
Bit1
Frequency limit caused by
current(LC03)
Bit0
Frequency limit caused by
voltage (LC05)
14
Outdoor unit fan speed
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
15
The average value of the
temperature values detected
by the high and low pressure
sensors in the last 10 seconds
of the compressor frequency
calculation period
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 --
16
The temperature value
detected by the high and low
pressure sensor
17
AD value detected by the high
and low pressure sensor
If it is higher than 199, the digital display tube will show single
digit and tens digit. (For example, the digital display tube
show “2.0”,it means 220.) Otherwise, if the it is higher than
99 degree, the digital display tube will show tens digit. (For
example, the digital display tube show “2.0”,it means 120.)
When there is no pressure sensor, it is displayed as --
18
The currently running
communication protocol
version
00-99
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 ...