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5.3 INSTALLING NEW SOFTWARE USING A PC Card
5.3.1 Procedure
TIP
Whenever performing a major operation to a microprocessor, such as installing new operating software, it
is always a good idea to start the unit and give it a quick check over prior to performing the operation.
NOTE
Once the unit shuts down to begin the software install process, the Compressor Suction Modulation Valve
closing process begins. The software installation processes will not begin until the CSMV is completely
closed, which will delay the actual process for about 45 seconds.
The display and MessageCenter may behave differently during the software loading process, de-
pending on the version of software currently in the controller. DO NOT INTERRUPT THE SOFT-
WARE INSTALLATION PROCESS ONCE IT HAS STARTED.
2. Insert a Download Card into the PC card slot on the
front of the microprocessor. Be certain that the
instruction label on Download Card is facing the
“Caution” label on the microprocessor. Do not force
card into slot.
5. Press = to load the program. The MessageCenter will go blank. If the engine is running, it will
shut down. After a few seconds, the display will power up, and the MessageCenter will show
INSTALLING PROGRAM SOFTWARE during the software install process. The Card Status
LED adjacent to the PC Card slot will blink together with the Micro Status LED during this
installation process. Once the entire program has been loaded, the MessageCenter will show
INSTALL COMPLETE -- REMOVE CARD. At the same time, the Card Status LED will stop
blinking and be on solid, indicating that the software install is complete.
6. When the card is removed, the Micro will power up. Allow the Micro to completely power up
(Main Display and MessageCenter displaying appropriate messages) once after installing the
new software before turning the power off. DO NOT PLACE THE SROS IN THE OFF POSITION
DURING THIS INITIAL POWER UP FOLLOWING A SOFTWARE UPGRADE.
1. Place the Stop/Run -- Off Switch (SROS) switch in the
Start/Run Position.
3. The MessageCenter will show one of 3 different
messages:
Same SW: “= to Load, ↑ To Cancel”
Old SW: “= to Load, ↑ To Cancel”
New SW: “= to Load, ↑ To Cancel”
CAUTION
4. Choose New.
5.3.2 Troubleshooting Loading Problems
If after loading the software program, the microproces-
sor does not power up, or the engine does not start,
use the following to isolate the problem.
a. Did the unit perform properly prior to loading the
software? If not, the problem most likely is not a re-
sult of the software loading process.
b. Check the Micro Status LED near the PC Card slot
on the microprocessor. It should be blinking contin-
uously at the rate of 1 second on and 1 second off.
This is the "normal" heartbeat rate of the micropro-
cessor.
c. If the Micro Status LED is blinking at the rate of
5 second on and .5 second off, the microprocessor
is still in Program Mode, and the software is not fully
loaded into memory. Load the software again, being
careful to follow each step completely in sequence.
d. If the Micro Status LED is not on at all, check for
ground at microprocessor terminal MPQC2 and for
12 volts from the Start/Run-Off switch at 5MP1. If
voltage and ground check OK, the microprocessor
may require replacement.
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