Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 40

(c) Saving of Operation Data
For the purpose to investigate the cause of trouble in the field, the operation data are always saved in the memory, and if the trouble
occurs, the data writing is stopped and the operation data prior to the trouble occurrence are recorded. These data can be retrieved to
personal computer through RS232C connector on the outdoor control PCB and utilized for probing the cause.
(i) Opearation data for a period of 30 minites prior to the present operation are saved and updated sequentially.
(ii) If an anomalous stop occurs, the data are not updated any more.
(iii) Data are written in at 1-minute interval and following data will be transmitted to PC upon demand.
Data
Software version
PID (program ID)
Outdoor unit capacity
Power supply frequency
Outdoor address
Indoor address × 16 units
Indoor capacity × 16 units
Outdoor unit capacity data
Single type
Master unit of combination
type
Slave unit of combination
type
(iv) Error retention and monitoring data
Code
Write-in contents
No.
00
Anomalous code
01 Address of unit where trouble occurred
02 Operation mode
03
High pressure sensor
04 Low pressure sensor
05 Heat exchanger temp. 1 (Exit, Front)
06
Heat exchanger temp. 2 (Exit, Rear)
07 Heat exchanger temp. 3 (Entrance, Front)
08 Heat exchanger temp. 4 (Entrance, Rear)
09 Tho-D1 Discharge pipe temp. (CM1)
10 Tho-D2 Discharge pipe temp. (CM2)
11 Tho-C1 Under-dome temp. (CM1)
12 Tho-C2 Under-dome temp. (CM2)
13 Tho-A Outdoor air temp.
14 Tho-P1 Power transistor temp. (Heat dissipation fin)
Data Range
Ascii 15 byte
Ascii 2 byte
Ascii 3 byte
Ascii 2 byte
Ascii 2 byte
Ascii 2 byte × 16 units
Ascii 3 byte × 16 units
Outdoor unit capacity data
Example: 24HP - [S24]
Example: 46HP - [S46]
Example: 20HP - [C20]
Data write-in
Write-in unit
range
00~99
00~FF
0~2
0.00~5.00 A/D value
0.00~2.00 A/D value
-35~75 A/D value
-35~75 A/D value
-35~75 A/D value
-35~75 A/D value
20~140 A/D value
20~140 A/D value
-15~90 A/D value
-15~90 A/D value
-20~43 A/D value
20~140 A/D value
-
Example
KD3C218######## (#: NULL)
5D
As shown in table at right
60
00 ~ 3F
40 ~ 7F
022 ~ 280
Remarks
S: Display with Horse Power of single type or
single use of combination type
S: Display with Horse Power of master unit of
combination type
C: Display with Horse Power of slave unit of
combination type
Record data
Number of
bytes
00: No anomalous, outdoor unit all anomalous ???
— 1
00~3F: Outdoor unit side, 40~6F: Indoor unit side
— 1
0 Stop
1 Cooling
— 1
2 Heating
1
1
Cooling liquid side
2
Cooling liquid side
2
2 Cooling gas side
2 Cooling gas side
1
1
1
1
1
1
38
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Contents
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