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Chapter 4: Troubleshooting
PC Command Line Interface
Service Manual 4-13
4.1.11 Heat Engine Diagnostic
This menu provides two high level functions:
• 25% Output Test
• Perform POST (Processor Reset)
Perform Power On Self Test (POST) displays Power and Control Board Relay states, TSTAT States Heat Control
Processor Software Revision, Error Code, POST and Online Self Test (OLST) messages and Mode Messages.
To run the 25% Output Check, select the same and press the Start key. Once started, the Cmd field should
read 25 while the Rpt field should read between 24% and 26%.
Press the Stop key to stop the 25% Output Check.
4.2 PC Command Line Interface
Using a PC and null modem cable gives access to an additional diagnostic screen that allows you to update
system software, access logs and perform other commands not available on the unit’s service mode
screen.
To order the communication cable, refer to “2.1.2.3 Service tools” on page 2-2 .
4.2.1 Accessing the PC Command Line Interface
1. Connect the cable to the 9 pin serial port located on the back of the warmer to a windows based PC.
2. Open Hyper Terminal (for Windows XP, select Start/All Programs/Accessories/Communication/)
3. Provide a name in the resulting dialog and click OK.
4. In “Connect Using” Select COM 1
5. Enter Bits per second 115200
Data bits 8
Parity None