Troubleshooting
October 2000
RT1300056 Rev.1
11
Instruction 1: Wire in redundant heater when heater-circuit failure occurs between heater splice and dispenser
cavity (See Wiring Diagram). Cut white wire two inches away from 10-pin connector. Splice one of the Blk/Wh leads
from wire harness to loose ends of the white wire. Next, cut the brown wire two inches from the 10-pin connector.
Splice the other Blk/Wh wire to the two-inch stub of the brown wire at Pin 3 of the 10-pin connector. Tape off the
remaining, loose end of the brown wire.
NOTE: Never wire in both heaters at the same time. Doing so will ruin the PCB.
Instruction 2: Wire in redundant heater when heater-circuit failure occurs in white wire between top hinge and
heater splice (See Wiring Diagram). Cut white wire two inches from 4-pin connector at top hinge. Splice violet wire
onto two-inch stub of white wire at 4-pin connector. Tape off remaining, loose end of white wire. In cavity, cut white
wire two inches from 10-pin connector. Splice violet wire and one Blk/Wh wire to two-inch stub of white wire at 10-pin
connector. Tape off loose end of white wire. Next, cut brown wire two inches from Pin 3 on 10-pin connector. Splice
second Blk/Wh wire to two-inch stub of Brown wire at 10-pin connector. Tape off loose end of brown wire.
NOTE: Never wire in both heaters at the same time. Doing so will ruin the PCB.
!
WARNING
To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before
servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires
removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization.
10-pin
Connector
Pin-1
Pin-3
BLK/WH
WH
WH
BLK/WH
BROWN
This is how wiring should look at the 10-pin
connector after redundant heater is wired
into system per Instruction 1.
This is how wiring should look at the 10-pin
connector after redundant heater is wired
into system per Instruction 2.
10-pin
Connector
Pin 1
Pin 3
BLK/WH
WH
WH
BLK/WH
BRN
VT
