Sigma 6000+ - Cleaning Interior Fan

CLEANING INTERIOR FAN
Reference Drawings: 86801 — Sub-Assembly Final
86810 — Final Assembly
87403 — Fan & Guard Assembly
Equipment Required: Slot head screwdriver
Phillips head screwdriver.
Wire tie cutter
Loctite #290
CAUTION: Unit to be disconnected form AC power when servicing. Use proper static control when
servicing unit.
NOTE: ‘SIGMA recommended cleaning to be done at least (1) time a year or when unit is being
serviced. To be done only by a qualified technician.
PROCEDURE: *** Reference drawing 86810 steps 1-2***
1.
2.
3.
10.
1.
12.
13.
14.
Remove (4) screws (Item 12) and (4) washers on case bottom and remove case (em 9) from unit.
Peel back insulating sticker (Item 5) to expose Main PCB.
Disconnect the batter (+) positive terminal from the left side. Split the two halves apart and
disconnect the (+) positive terminal on the right side.
*** Reference drawing 86801 steps 4-5***
Remove (2) screws (Item 37), (2) nuts (Item 36) and (2) washers (Item 35) from fan/guard
assembly (Item 34) and bottom plate assembly (Item 2).
Remove fan/guard assembly from unit and disconnect wire connection.
*** Reference drawing 87403 steps 6-9***
Cut and remove wire ties (Item 3) form fan/guard assembly.
Remove guard and wipe clean with damp cloth.
Using a damp cloth, wipe the fan blades and housing. Do not immerse fan into cleaner. Wipe
dry or allow to air dry prior to reinstallation.
Securély attach guard to fan using (2) wire ties (Item 3).
*** Reference drawing 86801 steps 10-12***
Connect molex connector on fan/guard assembly to connector in unit. -
Securely attach fan/guard assembly to bottom plate assembly using (2) screws (Item 39), (2)
washers (Item 35) and (2) nuts (Item 36).
Apply a drop of Loctite #290 to the threads of the screws.
*** Reference drawing 86810 steps 13-14***
Reattach battery terminals and close Main PCB and reattach insulating bag (Item 5) to unit.
Place case on unit and securely fasten using (4) washers (Item 13) and (4) screws (Item 12).
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