Carrier 38MBRC Series Service Manual page 17

38MBRC: Service Manual
Outdoor Unit Point Check Function
NUMBER OF
PRESSES
00 Normal display
01 Indoor unit capacity demand code
The frequency after the capacity
02
requirement adapter
03 Room temperature (T1)
04 Indoor unit evaporator temperature (T2) If the temperature is lower than -9 degrees, the digital display tube displays "-9". If the
05 Condenser pipe temp.(T3)
06 Outdoor ambient temp.(T4)
07 Compressor discharge temp. (TP)
08 AD value of current
09 AD value of voltage
10 Indoor unit running mode code
11 Outdoor unit running mode code
12 EXV open angle
13 Frequency limit symbol
14 Outdoor unit fan speed
The average value of the temperature
values detected by the high and low
15 pressure sensors in the last 10 seconds
of the compressor frequency
calculation period.
The temperature value detected by the
16
high and low pressure sensor
AD value detected by the high and low
17
pressure sensor
The currently running communication
18
protocol version
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 9 — Outdoor Check Function
DISPLAY
Displays the running frequency, running state, or malfunction code
Actual data*HP*10
If the capacity demand code is higher than 99, the digital display tube displays a single digit
and a tens digit. (For example, the digital display tube displays "5.0", which means the
capacity demand is 15. The digital display tube displays "60", which means the capacity
demand is 6.0) GA algorithm models display "--"
If the temperature is lower than 0 degree, the digital display tube displays "0". If the
temperature is higher than 70 degrees, the digital display tube displays "70".
temperature is higher than 70 degrees, the digital display tube displays "70". If the indoor unit
is not connected, the digital display tube appears: "--"
The display value is between 0~199 degree. If the temp. is lower than 0 degree, the digital
display tube displays "0". If the temp. is higher than 99 degrees, the digital display tube
displays a single digit and a tens digit. (For example, the digital display tube displays "0.5",
which means the compressor discharge temperature is 105 degrees. The digital display tube
displays "1.6", which means the compressor discharge temperature is 116 degrees.)
The display value is a hex number. For example, the digital display tube shows "Cd", which
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 displays a single digit and a tens digit. For
example, the digital display tube displays "2.0", which means the EXV open angle is
120×4=480p.
If it is higher than 99, the digital display tube displays a single digit and a tens digit. (For
example, the digital display tube displays "2.0" which 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
displays a single digit and a tens digit. (If it displays 2.0, it means 120). When there is no
pressure sensor, it appears as --
If it is higher than 199, the digital display tube displays a single digit and a tens digit.
(For example, the digital display tube displays "2.0", which means 220.) Otherwise, if the
temperature is higher than 99 degrees, the digital display tube displays a tens digit. (For
example, the digital display tube displays "2.0", which means 120.) When there is no pressure
sensor, it is displayed as --
00-99
Bit7 Frequency limit caused by IGBT radiator
Bit6 Reserved
Bit5 Reserved
Frequency limit caused by low
Bit4
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)
17
REMARK
The display value is a
hexadecimal number.
For example, the digital display
shows 2A, then Bit5=1, Bit3=1,
and Bit1=1.
This means that a frequency
limit may be caused by T4, T3,
or the current.