4 - 11
TROUBLSHOOTING
APRIL 2021
32DFR108.C
FR2SS-SERIES SERVICE MANUAL
E
From page 4-6
Check voltage at both
sides of main circuit
breaker.
Is voltage only
on one side of circuit
breaker?
Yes
No
F
Open door (disengage door
switch); turn off ramp
power, disconnect bus
harness connector from
ramp interface connector
J6. Disconnect red 4 AWG
lead from positive (red)
terminal post TB2 at rear of
ramp. Reset circuit
breaker.
Does circuit
breaker trip?
No
Yes
Short in bus wire harness .
To page 4-12
Short in harness between
circuit breaker and P1
connector.