5–13
62-11640
5.5
MAIN MICROPROCESSOR REPLACEMENT &
SETUP
NOTICE
Under no circumstances should a techni-
cian electrically probe the modules at any
point, other than the connector terminals
where the harness attaches. Module com-
ponents operate at different voltage lev-
els and at extremely low current levels.
Improper use of voltmeters, jumper
wires, continuity testers, etc. could per-
manently damage the module.
Some main microprocessor inputs operate at voltage
levels other than the conventional 12 VDC. These inputs
include but are not limited to the pressure transducers
and temperature sensors. Under no circumstances
should 12 VDC be applied at these connection points.
NOTICE
Electronic modules MUST be handled
with care to prevent accidental damage
or degradation from electrical static dis-
charge (ESD), contamination or abuse.
Before touching a module, touch your
body and/or conductive tool being used
to the frame to discharge ESD safely. All
electronics should be handled carefully
and only held by edges of any exposed
board. Care should be taken when insert-
ing/extracting connectors and compo-
nents to avoid exerting excessive stress
on the board which could fracture small
components nearby, resulting in future
failure of circuit.
When field diagnosis of a Carrier Transicold refrigeration
unit determines that an APX main microprocessor is not
performing properly and must be replaced, the replace-
ment microprocessor must be setup for this unit and
customer by entering the required Configurations, Func-
tional Parameters and DataLink data recorder settings.
If the replacement microprocessor is not loaded with
the most recent software, it should be updated. If soft-
ware is loaded, it should be verified that it is the
approved revision for this model.
When a module is replaced, software should be
upgraded before switching the unit on. This will ensure
software compatibility of all modules.
The preferred method for setup of the main micropro-
cessor is to use the display mounted keys or a Data
Transfer USB memory device. All required changes,
except unit specific and time sensitive data, may be
performed using the USB memory device.
If a USB is not available the main microprocessor may
be setup using TRU-Tech. TRU-Tech allows entry of all
required data. If neither a USB memory device or TRU-
Tech and service cable is available, the main micropro-
cessor may be setup for immediate use using the dis-
play mounted keys. Changes to the default DataLink
data recorder settings may not be entered using the
display mounted keys. If the main microprocessor is
setup using the display mounted keys and this feature
is needed, it may be loaded at a later date.
5.5.1
Pre-Replacement Steps
Before the unit can be started using the replacement
main microprocessor certain unit specific and time sen-
sitive data must be known.
TIP
Print this page and fill out the following for
use when entering the data.
That information includes:
• Unit Serial Number. ________________
• Unit Model Number. ________________
• Engine Protect Hours. ______________
• Standby Protect Hours. ______________
• Switch On Protect Hours. ____________
• Engine Sleep Hours. ________________
• Standby Hours. ____________________
• Switch On Sleep Hours. _____________
• High Speed Hours. _________________
• Start Cycles. ______________________
• Date and Time. ____________________
• ID Number. _______________________
1. If possible, power the original system up by
entering PC Mode, or by placing the START/
RUN - OFF switch in the START/RUN position.
2. Insert a Data Transfer USB memory device and
download all data from the DataLink data
recorder. If a Data Transfer USB memory device
is not available, data may also be downloaded
using TRU-Tech and a service cable.
3. Scroll through the data list and hour meter read-
ings and make note of the unit specific data
listed above. If the original main microprocessor
will not power up, gather the unit specific data
from the model/serial number nameplate and
estimate hour meter readings from the unit
maintenance records. If a Data Transfer USB
memory device will be used to setup the
replacement main microprocessor, write the
required data to the device. Also, if the current
configuration file is available for this customer
from the TransCentral web site, it should be
transferred to the device prior to beginning work.
Summary of Contents for Vector 8500
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