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CONDITION PROBABLE CAUSE(S)
Elevator travels in DOWN
direction very slowly
a) Valve operator board not adjusted properly
b) Elevator binding on rails / improper lubrication
c) Rails not plumb
d) Gate valve partially closed
e) Jack is binding
f) Proportional valve faulty
g) Valve microprocessor faulty
h) Flow control (if equipped) faulty or not set
Fuses at disconnect blown a) Incorrect size (amperage) fuse
b) Loose wiring on main power contactors
c) Incorrect wire gauge from disconnect to unit
d) Direct short circuit on main power side
Emergency Power does not
activate
a) Auxiliary disconnect switch/jumper at AUX, (T3912)
connection, loose or missing on power supply board in pump
b) Battery voltage below 18V DC
c) "LVC" LED off
d) Main 110V AC power not interrupted
e) Fuse blown at pump unit
Emergency light remains on a) No 110V power to controller
Elevator will not travel in DOWN
direction
a) Platform on safeties/slack rope
b) Normal limit down switch activated or faulty/loose wire
connections
c) "SC" and "DCL" LEDs not lit
d) Defective push button
e) Loose wire connections on push button/controller
f) Gate valve closed
g) Flow control (if equipped) adjustment not set properly
h) Faulty valve microprocessor
i) Faulty proportional valve
j) Valve operator board adjustments not set properly
Elevator runs with a door open a) Incorrect lock wiring
b) Lock circuitry may have been “jumped out”
Elevator "creeps" in DOWN
direction (drifts down)
a) Manual lowering valve partially open
b) Oil contaminants in down hydraulic circuit
c) Oil leak
Elevator will not relevel at upper
floors
a) Door zone and level up switch not activating/loose wire
connections
b) Improper setting of switch, vane or cams
Excessive Machine Vibrations a) Lack of Lubrication on rails
b) Guide shoes too tight on rails
c) Cylinder packing dry or too tight
d) Rail bracket mounting bolts loose
e) Pump unit mounting bolts loose; faulty pump unit
f) Jack binding/out of plumb
g) Hydraulic pipe not securely fastened
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