Pre-Replacement Steps; Microprocessor Replacement - Carrier VECTOR 6500 Operation & Service Manual

CAUTION
Most electronic components are suscepti-
ble to damage caused by electrical static
discharge (ESD). In certain cases, the hu-
man body can have enough static electric-
ity to cause resultant damage to the compo-
nents by touch. This is especially true of the
integrated circuits found in the Advance mi-
croprocessor.
Grounded wrist cuffs are available from Carrier (P/N
07-00304-00). These should be worn whenever han-
dling a microprocessor.
Although there is less danger of electrical static dis-
charge (ESD) damage in the outdoor environment or in
a repair shop - where the processor is likely to be han-
dled - proper board handling techniques should always
be used. Advance Microprocessors should always be
handled by the plastic cover and not the exposed printed
circuit board. This not only precludes the possibility of
ESD damage, but also lowers the possibility of physical
damage to the electronic components.
When field diagnosis
refrigeration unit determines
Microprocessor is not performing properly and must be
replaced the replacement microprocessor must be
setup for this unit and customer by entering the required
Configurations, Functional Parameters and DataLink
data recorder settings.
If the replacement microprocessor is not loaded with the
most recent software, it should be updated. If software
is loaded, it should be verified that it is the approved
software for this model.
The preferred method for setup of the microprocessor is
to use PC cards. All required changes, except unit
specific and time sensitive data, may be performed
using the cards. If cards are not available the
microprocessor may be setup using ReeferManager.
ReeferManager allows entry of all required data. If
neither PC Cards or ReeferManager are available the
microprocessor may be setup for immediate use using
the keypad. Changes to the default DataLink data
recorder settings may not be entered using the keypad,
if the microprocessor is setup using the keypad, this
feature will need to be loaded at a later date.

5.7.1 Pre-Replacement Steps

NOTE
For diagnoses of problems with the micropro-
cessor, DataLink data recorder downloading,
file analysis using Reports or use of PC cards,
refer to Section 9.6
Before the unit can be started using the replacement
microprocessor certain unit specific and time sensitive
data must be known. That information includes:
S Unit Serial Number.
S Unit Model Number.
of a Carrier Transicold
that an Advance
S Engine Protect Hours.
S Switch On Protect Hours.
S Engine Sleep Hours.
S Standby Hours.
S Switch On Sleep Hours.
S High Speed Hours.
S Start Cycles.
S Date and Time.
S ID Number.
a. If possible, power the original microprocessor up, by
entering PC Mode, or by toggling the Main Power
switch out of the OFF position.
b. Insert a Download PC Card into the PC Card slot and
download all data from the DataLink data recorder If
a Download Card is not available, data may also be
downloaded using the ReeferManager PC Program.
c. Scroll through the data list and hour meter readings
and make note of the unit specific data listed above.
If the original microprocessor will not power up, gath-
er the unit specific data from the model/serial num-
ber nameplate and estimate hour meter readings
form the unit maintenance records. If PC Cards will
be used to setup the replacement microprocessor,
write the required data to the cards. Also, if the cur-
rent configuration file is available for this customer
from the TransCentral site, it should be downloaded
and written onto the card prior to beginning work.

5.7.2 Microprocessor Replacement

a. Power down the microprocessor by removing the PC
Mode connector and/or placing the Main Power
switch in the OFF position.
b. Remove negative battery cable from battery.
c. Remove Connectors 1MP, 2MP, & 3MP from the out-
side of the Control Box.
d. Open the control box door.
e. Remove Connectors 4MP, 5MP & 6MP inside the
Control Box. Remove all wires from the Micropro-
cessor.
f. Locate wire to 80A fuse that runs through the current
sensor. Note the orientation of the wire through the
current sensor, to be certain that the wire is rein-
stalled through the new current sensor in the same
direction. (Inserting the wire through the current
sensor in the opposite direction will result in erro-
neous current readings.) Remove wire from fuse
holder and gently pull through the current sensor.
g. Remove the screws holding the sides of the micro-
processor into the control box. Remove the single
screw holding the top of the microprocessor in place.
h. Pull the microprocessor back, and twist it out of the
control box.
i. Install the new microprocessor by reversing the pre-
ceding steps
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