B�CheckFilterLight; General Information; The Reset Switch Does Not Reset The Check Filter Light; D�HepaResetButtonLocation - Simplicity S36 Service Manual

B. Check Filter Light

1. General information

The check filter mechanism works on a timer. When the canister has accumulated 25 hours of operating time, the PC board triggers the
check filter light to indicate the HEPA filter should be replaced. Pressing the "Reset" button will reset the timer and turn the light off.
Ifthelightcomesonbefore25hoursofuse,placethehoseonafunctionaltestcanisterorreplacethefaultyhoseandrecheckthelight�If
the light stays on, verify when the filter was last changed and that the reset button was pressed afterward.
NOTE:Pushingtheresetbuttonshouldresetthetimerandturnthelightout�

2. The reset switch does not reset the check filter light.

ChecktheresetswitchandwiringtoPCconnectionboardasfollows:
B� Step 1.
Remove HEPA filter.
B� Step 2.
Removethecoversforthecanisterpowerswitchandthecordrewindbutton(becarefulnottolosethesprings)�
B� Step 3.
1�Removethe8(eight)screwsholdingtheblackbracketinposition,thiswillallowyoutoseethewiring�Checkthewiringfor
brokenorpinchedwires�
2�Ifallthewiresaregoodcontinue to Step 4.
3�Ifnecessaryreplaceanybadwiring�
4�Re-assemblecanisterandre-test�
B� Step 4.
1�Withthehoseconnectedandcanisterpluggedin,takeaDCvoltmeterandcheckvoltsatthethePCconnectionboard(red
wires)shouldread4to5voltsDC�
2�Ifvoltageisgoodcontinue to Step 5.
3�IfvoltageisnotgoodreplacethePCboard�
4�Re-assemblecanisterandre-test�
B� Step 5.
Placethetesterontheconnectorlocatedontheresetswitch�Thisshouldread-4to-5voltsDC�
2�Ifvoltageisgoodcontinue to Step 6.
3�Ifvoltageisnotgoodreplacethewiringtotheswitch�
4�Re-assemblecanisterandre-test�
B� Step 6.
1�Withvoltmeterreading-4to-5voltspresstheresetswitch
andvoltsshouldgotozerothereturnto-4to-5volts�Ifthe
voltmeterdoesnotzerooutforamomenttheresetswitchisbad
andshouldbereplaced�
2�Re-assemblecanisterandre-test�
NOTE:YouwillalsowanttoreplacethePCboardifthelightiscomingon
atlessthan22hoursofoperation�
07�03�07
Figure D. HEPA Reset Button Location.
HEPA filter cover
3
S-Class HEPA filter
Reset Button
I�GeneralFullSizeCanisterIssues