Appliance Desk 4000 Service Manual page 18

The venting fan is defective
13.3
be about 1.2MΩ (forward resistance) or 144MΩ (backward resistance). If not, please
replace a new venting fan.
How To Replace A New Venting Fan?
Power off and unplug the unit.

Remove two screws and washers on the rear side of work top. Lift the work top up a little by

holding its rear side, and then push it towards the door to remove the work top.
Remove the exhaust duct from the connector, and disconnect the terminals.

Remove the duct connector by removing four screws (see figure below).

Disassemble the venting fan and its holder by removing four bolts, which fix them on the cabinet.

Replace a new one and re-assemble the venting fan and its holder carefully, and then connect its

terminals.
Before removing the connector
14. Condensing moisture on VFD/Lens.
Ambient humidity too high:
14.1
Hot air escapes from the heater chamber:
14.2
chamber by unscrewing five screws, and then re-assemble them with painting some silicon
sealant on the mating surfaces.
15. Unreadable display on VFD
Bad connection with the communication cable:
15.1
the terminals on the display board and electronic module.
: Check for the resistance of this fan, the readings should
After removing the connector
Re-install the unit in a dry and ventilated place.
Disassemble the top section of heater
~ 17 ~
Check for this cable, and re-insert