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21. relay stuck off
Some power units may have an internal relay, rather
than a solid state control board to switch the unit.
If the procedures described in 1, 2, 3, 4, 5, 6, or 7
do not correct the problem whereby the unit won't
start, there could be a fault in the relay, the internal
transformer, or a loose connection in the power unit.
Internal service to the power unit should only be
carried out by qualified persons. Please call your
service technician.
22. Control pCB faulty
Some power units have a solid state control board
instead of a relay.
If the procedures described in 1, 2, 3, 4, 5, 6, or 7
do not correct the problem whereby the unit won't
start, there could be a fault in the Control pCB, or a
loose connection in the power unit.
Internal service to the power unit should only be
carried out by qualified persons. Please call your
service technician.
23. loose internal connection in unit
Refer to "21" and "22" above.
24. hose plugged into another wall valve
Refer to "18" above.
25. led light
Some power units have an led light on the side of
the canister to tell you there is power at the unit. If
the light is not on, refer to "5" above.
26. Cannot turn on or turn off using a switch hose
ensure the hose is plugged into the inlet valve with
the hose cuff locating lug in the correct position.
Rotate the hose cuff so the lug sits between the two
locators correctly.
iCentral Central Vacuum Systems
21
OWNER'S MaNual
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