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Action
Step 6
Replace the controller board. See
page
393.
Does the problem remain?
Main fan service check
Action
Step 1
Check the main fan area for obstructions.
Is the fan area free from obstructions?
Step 2
Remove the obstructions.
Does the problem remain?
Step 3
Check the cable on the JFAN2 connector on the controller board
for proper connection.
Is the cable properly connected?
Step 4
Reconnect the cable.
Does the problem remain?
Step 5
Replace the main fan. See
Does the problem remain?
Step 6
Replace the controller board. See
page
393.
Does the problem remain?
"Controller board removal" on
"Main fan removal" on page
"Controller board removal" on
Diagnostics and troubleshooting
Yes
Contact the next
level of support.
Yes
Go to step 3.
Go to step 3.
Go to step 5.
Go to step 5.
Go to step 6.
338.
Contact the next
level of support.
228
5028
No
The problem is
solved.
No
Go to step 2.
The problem is
solved.
Go to step 4.
The problem is
solved.
The problem is
solved.
The problem is
solved.
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