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47
Installation and Operation Manual
AccuMax SP
Symptom
Probable Cause(s)
Corrective Action
Poor ground to valve driver box.
Make sure screws are tight and
a good ground is maintained.
Low hydraulic oil pressure.
Clean or replace filters.
Low hydraulic oil level.
Refill the reservoir and check
for oil leaks.
Lo Con
appears on display.
Concentrate level in tank is low.
Fill concentrate tank.
Low-tank level sensor or wiring
Repair or replace defective
is inoperative.
components.
Err.Su
on power up.
Setup parameter memory is not
Contact Hypro for replacement.
functioning.
NOTE: This unit will continue
to operate using factory
set-up values
.
Display shows
?
for flow.
Flowmeter is sensing water flow,
Check flowmeter.
but the flow rate is too low for
precise proportioning.
Check flowmeter calibration.
Foam pump capacity below rating.
Inlet strainer obstructed.
Remove and clean inlet
strainer.
Inlet plumbing obstructed.
Check all piping, valves and
hoses for debris, such as wire
ties that can obstruct flow.
Foam does not gravity feed to pump.
Open drain/air bleed valve on
foam pump suction. If foam
does not flow freely,
modification of piping and
pump position is required.
Foam too viscous.
Above 2000 centipoise
increase suction on electric-
driven foam pump is required.
Increase strainer size and
pump inlet line size to allow for
less pressure drop and better
flow.
Inadequate hydraulic pump speed.
Increase engine RPM.
CAL/INJECT valve is leaking.
Valve seat is loose.
Remove hose and fitting from
inject port of valve and tighten
seat. Reconnect fitting and
hose.
Troubleshooting Continued on Next Page
System returns to standby mode
while pumping or
HYPRO
appears
momentarily while pumping.