Nilfisk-Advance 7765 Service Manual page 88

Service Manual – Advance 7765 / Nilfisk CR1500
Problem
No solution being
transferred from the
recovery tank to the
solution tank (ESP/
Recycle option
only).
No detergent being
delivered to the
solution (ESP/
Recycle option
only).
No solution flow
through the Power
Spray Wand
(optional).
Cause
Recycling System ON/OFF
switch is set to OFF.
Solution inlet filter dirty or
plugged.
ESP solution pump not
operating.
No voltage from the
Recycling System ON/OFF
switch to the ESP solution
pump.
Recycling System ON/OFF
switch is set to OFF.
Detergent Flow knob is set
to OFF.
Detergent tank is empty.
Detergent supply lines are
clogged.
Detergent pump not
operating.
Plugged solution feed hose.
Water pump not operating.
Solution valve on the wand
assembly not operating
correctly.
Correction
Set the Recycling System ON/OFF switch to ON.
Clean or replace the filter.
Check the pump and wiring and repair/replace as
necessary.
• Check for voltage from wire #41 on the High
Recovery Warning Light to the Recycling System
ON/OFF switch. Repair or replace the wiring as
necessary.
• Check the Recycling System ON/OFF switch and
wiring and repair/replace as necessary.
Set the Recycling System ON/OFF switch to ON.
Turn the Detergent Flow knob clockwise from the
OFF position.
Check the detergent tank and refill as necessary.
Check the detergent lines and clean/replace as
necessary.
• Check the Recycling System ON/OFF switch and
wiring and repair as necessary.
• Check the Detergent Flow rheostat and wiring to
the detergent pump and repair as necessary.
• Check the detergent pump. Replace if necessary.
Check and clean the solution feed hose as
necessary.
• Check the On-Off toggle switch and wiring and
repair as necessary.
• Check the water pump. Replace if necessary.
Check the valve and repair/replace as necessary.
Solution System 193