GE PANDA Service Manual page 95

Possible Causes
Open or loose
heater AC fuse
connection
(at Power ON)
4.4.5.13 Sys Fail 11 [AA AA AA AA]
Heat Control Processor stopped communicating with the Main Application Processor due to POST failure.
Possible Causes
Wrong mains
voltage
Open or loose
heater AC fuse
connection
Open T-Stat at
Power-on
Service Manual
Step Troubleshooting Procedure
Verify status of /Reset input signal at TP21 pin 2 on
3.
the Power PCA is high (>2V). If valid go to Step 6.
If /Reset signal status in Step 3 is not valid, first
4.
replace the communication ribbon cable.
5. If the problem persists, replace the Control PCA.
If the /Reset signal status in step 3 is valid, check
6. fuses F9 & F10 on Power PCA. Replace fuses as
necessary. (Also refer to step 8.)
If fuses F9 and F10 are OK or if the problem
7.
persists, replace the Power PCA.
If fuse F9 or F10 is discovered to be loose in its clip
8. mounts, replace the Power PCA. Do not attempt to
repair it by bending the clips.
Step Troubleshooting Procedure
If unit is plugged into the wrong mains voltage (or
1. mains voltage too high/low) then Power PCA will
fail POST (Power-On Self Test)
If the alarm has occurred during normal run time,
2. check fuses F9 & F10 on Power PCA. Replace fuses
as necessary.
If fuses F9 and F10 are OK or if the problem
3.
persists, replace the Power PCA.
If fuse F9 or F10 is discovered to be loose in its clip
4. mounts, replace the Power PCA. Do not attempt to
repair it by bending the clips.
If the warmer has been in recent use and this
alarm has occurred about one minute after a
5.
power on attempt, shut down and power up in
Service Mode.
Review the Errors list. Look for the presence of a
Sys Fail 09 0B or Sys Fail 6. If this pattern exists,
6. then the heater head has overheated, and the
thermostat has opened. (Follow steps under
Sys Fail 6).
Check for and remove any obstructions of the
7.
heater head cooling vents.
Chapter 4: Troubleshooting
Troubleshooting Tables
Comments
DMM
DMM
Comments
Refer to Tech
Bulletin 08 011 for
more information.
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