Does machine raise/
lower?
Does pump operate?
Check for power connection. See Hy-Brid Troubleshooting
Replace pump assembly
No
Ascent speed slow or
erratic?
Is emergency down
valve open?
Close emergency down
valve or cable connections
Is hydraulic fluid
With platform lowe
pump reservoir to 1
top of reservo
Yes
No
Is battery fully charged?
Is emergency down
valve open?
Are any structural
members bent?
Contact manufacturer to
arrange replacement.
I
R
Charge battery.
Close emergency down
valve.
Yes, but
not properly
Is power solenoid
damaged?
Replace
solenoid.
Are diodes functioning
properly?
Measure resistance across diode—Ohm meter/multi-meter at 40 k
ȍ
Will not descend?
Creeps down?
Has key switch been
turned off?
Is an E-Stop activated?
Is battery charged?
Turn key to on position.
Pull out emergency stop button
at upper and lower controls.
Charge battery.
Is emergency down
valve open?
Close emergency down valve.
Check cable connections.
Disassemble and clean. Look for residue in
screen and on O-ring or damage to O-ring.
Replace down valve.
Faulty down
valve?
Electrical
problem?
Foreign matter
lodged in up or
down valve?
Disconnect coil. Check if unit s
drifting. Check voltage at coil—s
be 0 V when not energized
Run unit up an
Might be able to
walls inside cylin
Starts descending,
then stops?
Check armguard limit
switch and relay.
Are maintenance lock
pins installed?
Starts ascending, then
stops?
Is platform
overloaded?
Check base limit
switch
Remove overload. Lower to stowed
position before continuing use.
Part #SUPO-615
REV H
Page 24 of 30
Is down valve stuck
open?
low?
ered, fill
1" below
oir
Flush valve by simultaneously
pressing up switch at base and down
switch on platform control for 30 sec.
Contact CEI for further
troubleshooting.
Check integrity of electrical
connections, There may be a
loose connection or momentary
short.
Flush down valve by
simultaneously pressing up switch
at base and down switch on
platform control for 30 sec.
There may be foreign matter
lodged.
Is there a restriction in
hydraulic hose?
Replace pump. May
be worn or defective.
Replace hydraulic hose.
Is up/down switch
damaged?
Replace rocker switch at
upper or lower control.
setting. With black lead on stripe side and red on other side, should get a resistance reading. Switch leads, no reading.
Replace bad diode.
SUPO-615 HB-P830 Troubleshooting Flowchart
Elevate & Lower Problems
Revision A: Initial Release
08/06/2010
Replace down solenoid.
Check for loose electrical
connections.
stops
should
.
Damaged cylinder or
damaged seal in
cylinder?
Coil mounting nut too
tight?
nd then check for oil flow out of return line. Bad cylinder
seal if oil is flowing from return line.
repair with seal kit;, probably need to replace cylinder. If
nder are scratched or pitted, cylinder needs replacement.
Nut should only be lightly snug:
30 in.-lb. Replace coil and lightly
tighten nut.
Faulty check valve in
pump?
Listen carefully near motor when
not energized—may be running
backwards. Replace pump
Part #SUPO-615
REV H
Page 25 of 30
