Carrier 38MGRBQ18B-3 Service Manual page 31

38MGRBQ: Service Manual
Press # DISPLAY
0 Normal Display
Quantity of indoor units with working connection
1
2 Outdoor unit running mode code
3 Indoor unit A capacity
4 Indoor unit B capacity
5 Indoor unit C capacity
6 Indoor unit D capacity
7 Indoor unit E capacity
8 Indoor unit A capacity demand code
9 Indoor unit B capacity demand code
10 Indoor unit C capacity demand code
11 Indoor unit D capacity demand code
12 Indoor unit E capacity demand code
13 Outdoor unit amendatory capacity demand code
The frequency corresponding to the total indoor
14
units' amendatory capacity demand
15 The frequency after the frequency limit
16 The frequency sending to compressor control chip
17 Indoor unit A evaporator outlet temperature (T2BA)
18 Indoor unit B evaporator outlet temperature (T2BB)
19 Indoor unit C evaporator outlet temperature (T2BC)
20 Indoor unit D evaporator outlet temperature (T2BD)
21 Indoor unit E evaporator outlet temperature (T2BE)
22 Indoor unit A room temperature (T1A)
23 Indoor unit B room temperature (T1B)
24 Indoor unit C room temperature (T1C)
25 Indoor unit D room temperature (T1D)
26 Indoor unit E room temperature (T1E)
27 Indoor unit A evaporator temperature (T2A)
28 Indoor unit B evaporator temperature (T2B)
29 Indoor unit C evaporator temperature (T2C)
30 Indoor unit D evaporator temperature (T2D)
31 Indoor unit E evaporator temperature (T2E)
32 Condenser pipe temperature (T3)
33 Outdoor ambient temperature (T4)
34 Compressor discharge temperature (TP)
35 AD value of current
36 AD value of AC voltage
37 AD value of DC voltage
38 EXV open angle for A indoor unit
39 EXV open angle for B indoor unit
40 EXV open angle for C indoor unit
41 EXV open angle for D indoor unit
42 EXV open angle for E indoor unit
43 MVI valve open angle
44 EVI valve open angle
45 Frequency limit symbol
46 T2B fault
47 Average value of T2
48 Outdoor unit fan motor state
49 Reason of stop
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 26 — Outdoor PCB (18K Only)
REMARK
Displays running frequency, running state, or malfunction code
Display
Actual Data 1
2
3
4
5
Off: 0,Fan only: 1, Cooling: 2, Heating: 3, Forced cooling: 4. Forced defrost: A
The capacity unit is horse power. If the indoor unit is not connected, the digital display shows the following:
"¯¯"
(9K:1HP,12K:1.2HP,18K:1.5HP,24K:2.0HP)
Norm code*HP
(9K: 1HP,12K: 1.2HP,18K: 1.5HP,24K:2.0HP)
If the temperature is lower than 15.8F (-9C), the digital display shows 15.8F (-9C) If the temperature is
higher than 158F (70C), the digital display shows 158F (70C). If the indoor unit is not connected, the
digital display shows: "-----"
If the temperature is lower than 32F(0C), the digital display shows ? 3 2F(0C). If the temperature is higher
than 122F(50C) the digital display shows 122F(50C). If the indoor unit is not connected, the digital display
shows: "-----"
If the temperature is lower than 15.8F (-9C), the digital display shows ? 1 5.8F (-9C). If the temperature is
higher than 158F (70C), the digital display shows 158F (70C) If the indoor unit is not connected, the digital
display shows:"-----"
The display value is between 86F-264F(30-129C). If the temperature is lower than 86F(30C), the digital
display shows 86F(30C). If the temperature is higher than 210F(99C), the digital display shows single and
double digits. For example, if the digital display shows "0.5", the compressor discharge temperature is
221F(105C).
The display value is a hex number.
For example, the digital display tube shows "Cd", it means AD value is 205.
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.
Bit7 Reserve
Bit6 Frequency limit caused by voltage
Bit5 Frequency limit caused by current
Bit4 Reserve
Bit3 Frequency limit caused by IPM
Bit2 Frequency limit caused by T5
Bit1 Frequency limit caused by T3
Bit0 Frequency limit caused by T2
00:No fault,01:T2B-A fault, ,02:T2B-B fault ,03:T2B-C fault,04:T2B-D fault, 05:T2B-E fault, 06:T2B-F fault
(The display priority is A-B-C-D-E-F)
(Sum T2 value of all indoor units)/(number of indoor units in good connection) (The heating is the average
value of T2, and the cooling is the average value of T2B)
Off: 0, Super ultra high speed:1, Super high speed:2, High speed:3, Med speed: 4, Low speed: 5, Breeze:6,
Super breeze: 7
31
Indoor Unit #
1
2
3
4
5
The display value is a hexadecimal
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 current, IPM or T3.