Carrier 42QHC009D8S Series - Page 59

28
33
Outdoor ambient temperature (T4)
34
Compressor discharge temperature (TP)
The display value is between 30–129 ℃. If the temperature is lower than
30 ℃, the digital display shows “30.” If the temperature is higher than
99 ℃, the digital display shows single and double digits. For example, if
the digital display shows “0.5", the compressor discharge temperature is
105 ℃.
35
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.
36
AD value of voltage
37
EXV open angle for A indoor unit
Actual data/4.
If the value is higher than 99, the digital display shows single and double
digits.
For example, if the digital display shows “2.0", the EXV open angle is
120×4=480p.
38
EXV open angle for B indoor unit
39
EXV open angle for C indoor unit
40
EXV open angle for D indoor unit
41
EXV open angle for E indoor unit
42
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
Frequency limit caused by PFC
Bit5
Frequency limit caused by T4.
Bit4
Frequency limit caused by T2.
Bit3
Frequency limit caused by T3.
Bit2
Frequency limit caused by T5.
Bit1
Frequency limit caused by current
Bit0
Frequency limit caused by voltage
43
Average value of T2
(Sum T2 value of all indoor units)/(number of indoor units in good
connection)
44
Outdoor unit fan motor state
Off: 0, High speed:1, Med speed: 2, Low speed: 3, Breeze:4, Super
breeze: 5
45
The last error or protection code
00 means no malfunction and protection
46
F indoor unit capacity
47
F indoor unit capacity demand code
48
F indoor unit evaporator outlet temperature (T
2B
F)
If the temperature is lower than -9 ℃, the digital display shows “-9.” If the
temperature is higher than 70 ℃, the digital display shows “70.” If the
indoor unit is not connected, the digital display shows: “――”
49
F indoor unit room temperature (T
1
F)
50
F indoor unit evaporator temperature (T
2
F)
51
EXV open angle for F indoor unit
17.5 Protection
17.5.1 Three minutes delay at restart for compressor.
17.5.2 Temperature protection of compressor discharge.
When the compressor discharge temp. is getting higher, the running frequency will be limited as below rules:
T5
Compressor off
Frequency limit
Normal
Frequency holding
17.5.3 Low voltage protection