Southworth ZLS Series, Руководство пользователя

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16 ZLS SERIES — FLOOR HEIGHT LIFT TABLES
ZLS Series Owner’s Manual
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE CHECK THIS
Lift will not raise
Weight of load too heavy Check the actual weight of the load
Motor not running Check the main disconnect switch, fuses, and
wiring to the motor. A 20 amp, designated braker
must be supplied for 110V
Hydraulic oil level low When lift is raised as far as possible, oil level
should be 3/4” from bottom of tank. When lift is
down, 3/4” from top
Lift has reached its upper limit Upper limit switch may need to be adjusted
Motor may be “single phasing” If motor hums but does not turn, check motor wir-
ing and line fuses.
Motor voltage too low Supply voltage should be +/- 10% of the rating at
the motor terminals.
Tank vent plugged If supplied, remove solid plug from tank, insert
vent plug.
Suction filter clogged Clean suction filter as described in periodic main
-
tenance
Vacuum leak in suction line
Check all fittings in suction line
Down valve may be energized Check wiring to down valve, and solenoid in the
valve
Missing coupling Check to insure the coupling has been installed
between the pump and motor
The lift fails to hold
Down valve may be leaking Remove down valve and inspect for debris which
may be preventing it from closing.
Down valve may be energized Check the solenoid in the valve with a volt meter.
Cylinder may be leaking Check for oil in cylinder in the vent line.
Lift will not lower
Down valve may be de-ener-
gized Check the solenoid in the valve with a volt meter
Flow control needs adjustment
Adjust flow control as needed
Lift raises too
slowly
Voltage may be low Check voltage at motor to ensure proper voltage
is being supplied
Foreign material clogging suction
filter, breather cap or pressure
line
Remove necessary components and clean
Pump may be overheating due
to insufficient oil
Check oil level and oil viscosity
Lift lowers too
slowly
Down valve may not be fully
open or stuck closed Remove down valve and clean
Flow control may need adjust-
ment
Adjust flow control as needed