Troubleshooting
18 3A1570L
Electronics
Fluid pressures not balanced
between A and B side
Fluid viscosities not equal Adjust A and B temperature settings
to balance viscosity. Sometimes nor-
mal if pressure offset is below 200 psi
(14 bar)
Preheat material in drums by recircu-
lating; see Operation manual
Inlet Y-strainer screen plugged on
low pressure side
Clean inlet filter screen
Gun port or filter plugged on high
pressure side
Clean or replace; see gun manual
Pump inlet ball not seating or sticking Clean seating; see pump manual
Drum fluid outlet supply hose too
small
Use 3/4 in. (1.9 cm) ID hose with
short length
Low side feed pump not working Turn on or repair feed pump
Pressure Relief/Spray valve leaking
back to supply
Pump does not reverse direction Obstruction of air motor or pumps Check and clear obstruction
Unequal fluid pressure between
UP/DOWN stroke
Feed pumps boost pressure on up
stroke.
Reduce feed pump pressures
Air motor doesn’t move with air pres-
sure applied
Damaged air valve Replace or service air valve. See Air
Motor manual.
Damaged pilot valve Replace valve. See Air Motor man-
ual.
Park valve left open or leaking
Pump movement speed is erratic Worn air motor seals Replace seals. See Air Motor man-
ual.
Worn pump seals Replace seals; see Pump manual.
PROBLEM CAUSE SOLUTION
Problem Cause Solution
Display does not illuminate.
No power.
Plug in power cord.
Turn disconnect ON .
Low voltage. Ensure input voltage is within specifi-
cations, page 37.
Loose wire. Check connections, page 37.
Display disconnected. Check cable connections, page 37.
Temperature display does not
illuminate.
Display disconnected. Check cable connections, page 37.
Display cable damaged or corroded. Clean connections; replace cable if is
damaged.
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