Carrier 38MGRBQ18B-3 Service Manual page 29

38MGRBQ: Service Manual
OUTDOOR UNIT DISPLAY (CONT)
PRESS #
0 Normal Display
1 Quantity of indoor units with working connection
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 units'
14
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 voltage
37 EXV open angle for A indoor unit
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
43 Average value of T2
44 Outdoor unit fan motor state
45 The last error or protection code
46 F indoor unit capacity
47 F indoor unit capacity demand code
48 F indoor unit evaporator outlet temperature (T2BF)
49 F indoor unit room temperature (T1F)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 25 — Outdoor PCB (All Sizes)
DISPLAY
Displays running frequency, running state, or malfunction code
Actual Data
Display
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)
Norm code *HP (9K: 1HP,12K: 1.2HP,18K: 1.5HP)
If the temperature is lower than 15.8F(-9 ℃), the digital display shows "-9." If the temperature is higher than
158F(70 ℃), the digital display shows "70." If the indoor unit is not connected, the digital display shows: "--"
If the temperature is lower than 32F (0 ℃), the digital display shows "0." If the temperature is higher than
122F (50 ℃), the digital display shows "50." If the indoor unit is not connected, the digital display shows: "--"
If the temperature is lower than 15.8F(-9 ℃), the digital display shows "-9." If the temperature is higher than
158F(70 ℃), the digital display shows "70." If the indoor unit is not connected, the digital display shows: "--"
The display value is between 86-264F(30–129 C). If the temperature is lower than 86F(F30 C), the digital
display shows "30." If the temperature is higher than 210F(99 ℃), 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.
(Sum T2 value of all indoor units)/(number of indoor units in good connection)
Off: 0, High speed:1, Med speed: 2, Low speed: 3, Breeze:4, Super breeze: 5
00 means No Malfunction and Protection
(Sheet 1 of 2)
Number of Indoor Units
1
2
3
4
5
Bit7 Frequency limit caused by IGBT radiator
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
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REMARKS
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 T4, T3, or the current.