The service manuel is very helpful, we where able to restore the device to its working operation again.
Text excerpt from page 212 (click to view)
4.1.13 Main Gear Unit 1) Remove the screws ST3X6 (3 pcs.) and loosen the screw BT4X8 (1 pc.) holding the rear plastic cover plate and then remove the stay (R). 2) Remove the upper set screw ST3X6 (1 pc.) from the ozone fan case. 3) Remove the ozone fan duct. 4) Remove the set screws ST3X6 (5 pcs.) from the main gear unit. 5) Remove the top cover securing screw to release the top of the gear unit plate. 6) Remove the main gear unit from the frame. Plastic cover plate
Stay (R)
Ozone fan duct
5
Main Gear Unit
Fig.7-18
Note: The black plastic cap covers the thread of the screw marked 5. Be sure not to lose the cap when removing the screw.
4.1.14 Transfer Solenoid (TRSOL) 1) Remove the set screws ST3X6 (2 pcs.) from the transfer solenoid. 2) Open the rear access cover. 3) Remove the transfer solenoid.
Rear Access Cover
Transfer Solenoid
5
Fig.7-19
Note: The black plastic cap covers the thread of the screw marked 5. Be sure not to lose the cap when removing the screw.
