Oki OKIFAX4550 Maintenance Manual page 249

Troubleshooting flow chart 4:
41309401TH Rev.4
Fuser unit thermal error
** PRINTER ALARM 4 **
Turn on power again.
Is the PRINTER
ALARM 4 message
displayed with a delay?
Yes
About 60 seconds later
Turn on power again.
Is the fuser unit heater
off?
Yes
Is the heater free from
wire breakage?
Yes
See ACTION 8.
No
See ACTION 7.
See ACTION 6.
No
See ACTION 7.
No
See ACTION 9.
249 /