Mec 2033ES - Troubleshooting

October 2008 "2033ES / 2633ES" Service & Parts Manual - ANSI Specifications
Page 4-6
PROBLEM REMEDY/SOLUTION
No operation
from upper or
lower control
station
Main battery switch turned off
TROUBLESHOOTING
POSSIBLE CAUSE
Located on of lower control box
GENERAL LOSS OF POWER
Emergency switch pushed in or
Base-Platform switch turned off
Pull upper and lower emergency stop switches to
initiate power
Circuit breaker tripped
Check for short circuits and Reset
Located in lower control box panel
Damaged upper control box
harness
Inspect from harness plug to terminal strip under
platform
Batteries discharged
Look for a 7 or 9 flash code while attempting
function. Check battery voltage under load
Check for motor controller flash
codes
See "Sevcon Motor Speed Controller" in this section
for troubleshooting flash codes.
Functions from
lower controls
but not from
upper controls
Upper Emergency Stop switch
pushed in
Pull upper emergency stop switch
Interlock switch (joystick) Check power to red wire (power to switch) and
power to purple wire (power out of switch) at
joystick plug
Damaged harnesses Check scissor and upper box harness for damage
LIFT
Partial or
intermittent lift
from either
control station
Low battery voltage, at 18 volts
operating
Lift will stop, a 9-flash code will be displayed on the
motor controller while attempting to lift
Platform overloaded Check platform load and compare with posted
Maximum Weight labels, reduce load
Lift relief valve RV1 out of
adjustment
Adjust relief valve to rated capacity
Lowering valve SV9 pulled out
or emergency down cable (if
equipped) sticking
Test potentiometer POT1 for open circuit
Located in upper control box, replace
6- flash code at motor controller
Inspect lowering valve, located on lift cylinder
Check cable adjustment/operation (if equipped)