Quantech QTC3040T, Installation Operation & Maintenance

Page: 176 / 190

QUANTECH
176
FORM QTC3-NM1
ISSUE DATE 08/03/2022
SECTION 9 – SERVICE AND TROUBLESHOOTING
Each output is controlled by the microprocessor by
switching 120 VAC to the respective output connection
energizing contactors, evaporator heater, and solenoids
according to the operating sequence.
120 VAC is supplied to the I/O board via connections
at TB7-1, TB7-6, TB10-1, TB10-6, TB8-1 and TB9-1.
Figure 40 illustrates the relay contact architecture on the
microboard.
FIGURE 34 -
I/O BOARD RELAY CONTACT
ARCHITECTURE
LD12722
SYS 1
COMP 1
TB7-2
SYS 1
COMP 2
TB7-4
SYS 1
COMP 3
TB7-5
TB7-3 LLSV 1
TB8-6
EVAP
PUMP
TB8-7
TB7
SYS 2
HGSV
TB10-7
SYS 2
FAN 2
TB10-8
TB10-9
TB10-10 SYS 2
FAN 4
TB10
TB8
TB10
SYS 2
COMPR 1 (4)
TB10-2
LLSV 2 TB10-3
SYS 2
COMPR 2 (5)
TB10-4
SYS 2
COMPR 3 (6)
TB10-5
TB7
SYS 1
HGSV
TB7-7
SYS 1
FAN 1
TB7-9
SYS 1
FAN 3
TB7-10
TB7-8
SYS 1
FAN 2
TB8-2
HEAT EXCH
HEATER
Data Logging to Flash
Enabling Data Logging to Flash
The user can enable data logging to an SD card in the
unit setup mode. When data logging is ENABLED or
SKIP UNCHANGED, data is continuously stored at
the programmed data log time on an SD card. The SD
card is in the socket of the 031-02550 I/O board.
Content
The root directory contains directories for each month.
named RMyyyymm, where yyyy is the four digit year
and mm is the two digit month. Under each monthly
directory, there are the individual daily CSV format-
ted files named yyyymmdd.csv, where yyyy is the four
digit year, mm is the two digit month, and dd is the two
digit day.
The first row of the file is the header text. The second
row is the header unit. The remaining rows contain the
data captured at the specified interval of 5 seconds.
If the user disables and then enables the data logging
the same day, the new data is appended to the existing
file.
When the SD card is full, the oldest day of data is de-
leted.