32DFR114.A
4 - 1
IV. FOLDOVER RAMP TROUBLESHOOTING
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.
WARNING
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
TABLE 4-1: TROUBLESHOOTING GUIDE
Function
Symptom
Possible Cause
Remedy
Main circuit breaker
tripped
Reset circuit breaker.
Hydraulic pump circuit
breaker tripped
Reset circuit breaker.
Vehicle interlock
conditions not met
Check that all interlock conditions are met before
attempting to deploy ramp.
No power to ramp
harness connector P1,
pin 6 (blue lead)
Check for ramp power at ramp harness
connector pin P1-6. Repair wiring, as required.
No signal from switch
to ramp harness
connector P1, pin 5
(black lead)
Check for DEPLOY REQ signal at ramp harness
connector pin P1-5. Repair wiring, as required.
Ramp control switch
defective
Replace or repair STOW/DEPLOY switch.
Door switch interlock
circuit defective
Replace or repair door switch or associated
wiring.
Main ramp power
switch defective
Replace or repair main ramp power switch.
Pump solenoid
defective
Replace pump solenoid.
Pump relay defective
Replace pump relay.
Electronic controller
defective
Check for PUMP SOLENOID INPUT signal at
controller connector pin J4-4. Replace controller,
if necessary.
Hydraulic pump assy
wiring harness
defective
Check for PUMP SOLENOID INPUT signal at
hydraulic pump wiring harness connector pin
J7-A (green lead). Repair wiring, as required.
DEPLOY
function
inoperative
or erratic
Hydraulic pump does
not operate; pump
solenoid does not
operate
Deploy sensor is
defective or out of
adjustment
Adjust ramp sensor target; set proper sensor-to-
target distance; refer to section B.6 in this
chapter. Replace sensor, if necessary.
T
