Oki ES3640MFP Service & Troubleshooting Manual page 105

Fan Failure
Error Codes that Apply
127
Fuser Fan
128
01 Fuser Fan
04 Belt Fan
918
Duplex Fan
Initial Troubleshooting Actions to Take
1. Ensure that the temperature and installation clearances of the printer are at specifications.
2. Clean all fan ducts.
3. Turn the printer off and allow a minimum of 30 minutes for cooling.
4. Restart the printer.
5. If the problem persists follow the procedure below.
Parts of the Printer that Apply
1. Fan Associated with the code
2. Engine Control Board
Troubleshooting Procedure
Steps
Test the cooling fan for proper
1
operation and adequate airflow.
Run the Motor Clutch
Does the fan operate correctly?
Does this resolve the issue?
2
02 Power Fan
05 Image Drum Fan
Action Taken
Fan test.
03
06
Yes
Replace the Engine
Control Board
Complete
PU Motor Fan
Top Cover Fan
No
Check the Fan connection.
Replace the Fan.