Ricon BR2SS Series Troubleshooting Manual

IV. FOLDOVER RAMP TROUBLESHOOTING
T
he troubleshooting information in this chapter applies to the Ricon BR2SS Series FoldOver Low-Floor Vehicle
Access ramp when installed in transit vehicles. The troubleshooting guide covers several possible failure modes,
including complete lack of response, erratic behavior, and inability to stow. Use the hydraulic diagrams in Figures
3-7, 3-8, and 3-9 and the electrical wiring diagram in Figures 3-10, 3-11, and 3-12 of Chapter III to supplement this
chapter.
The troubleshooting guide is intended to provide a logical starting point for general lift problems. However, not all
possible problems or combinations of problems are listed. The guide assumes that the vehicle battery is fully charged
and its connections are clean and tight.
THE TROUBLESHOOTING GUIDE DOES NOT INCORPORATE ROUTINE SAFETY PRECAUTIONS
OR PRELIMINARY PROCEDURES. TROUBLESHOOTING MUST BE PERFORMED BY A
TRAINED, AUTHORIZED RICON SERVICE TECHNICIAN DURING THE RICON WARRANTY
PERIOD. IT IS RECOMMENDED THAT TROUBLESHOOTING ALSO BE PERFORMED BY AN
AUTHORIZED RICON SERVICE TECHNICIAN AFTER THE WARRANTY PERIOD.
A. TROUBLESHOOTING TABLE
Function Symptom
DEPLOY Hydraulic pump does
function not operate; pump
inoperative solenoid does not
or erratic operate
WARNING
TABLE 4-1: TROUBLESHOOTING GUIDE
Possible Cause
Main circuit breaker
tripped
Hydraulic pump circuit
breaker tripped
Vehicle interlock
conditions not met
No power to ramp
harness connector P1,
pin 6 (blue lead)
No signal from switch
to ramp harness
connector P1, pin 5
(black lead)
Ramp control switch
defective
Door switch interlock
circuit defective
Main ramp power
switch defective
Pump solenoid
defective
Pump relay defective
Electronic controller
defective
Hydraulic pump assy
wiring harness
defective
Deploy sensor is
defective or out of
adjustment
32DFR114.A
TABLE OF CONTENTS
Remedy
Reset circuit breaker.
Reset circuit breaker.
Check that all interlock conditions are met before
attempting to deploy ramp.
Check for ramp power at ramp harness
connector pin P1-6. Repair wiring, as required.
Check for DEPLOY REQ signal at ramp harness
connector pin P1-5. Repair wiring, as required.
Replace or repair STOW/DEPLOY switch.
Replace or repair door switch or associated
wiring.
Replace or repair main ramp power switch.
Replace pump solenoid.
Replace pump relay.
Check for PUMP SOLENOID INPUT signal at
controller connector pin J4-4. Replace controller,
if necessary.
Check for PUMP SOLENOID INPUT signal at
hydraulic pump wiring harness connector pin
J7-A (green lead). Repair wiring, as required.
Adjust ramp sensor target; set proper sensor-to-
target distance; refer to section B.6 in this
chapter. Replace sensor, if necessary.
4 - 1