Chapter 4: Troubleshooting
Troubleshooting Tables
Service Manual 4-43
4.4.13 Mechanical (Bedded Models Only)
4.4.13.1 Bed Does Not Tilt
9.
Test fuses F2,F5. In addition, check the contacts on
the Warmer head harness. (Refer to“6.13 Wiring
Diagrams”.) Replace/repair as necessary.
Warmer head
harness part #:
6600-1558-700
10.
If OK, reattach J28. There is AC voltage coming off
of the Power PCA but no DC being transferred
back.
11.
Otherwise, there is no AC voltage coming off of the
Power PCA. Proceed with the following steps.
12.
Disconnect connector at J27 on the Power PCA.
Check for AC power at pins 3,5. Also, test the front
panel switch (standby switch) using an Ohm Meter
at pins 1,2. Off= Open, On= Short. If Open, there is
no AC voltage to the Power PCA, then the front
panel switch is defective.
13.
If no power, troubleshoot the Line Filter Harness
from the AC inlet through the main circuit breaker,
through the line filter, through to the J27
connection (refer to“6.13 Wiring Diagrams”) to find
the open in the circuitry.
Possible Causes Step Troubleshooting Procedure Comments
Possible Causes Step Troubleshooting Procedure Comments
Disconnected
control cable
1.
Check that the cable terminators are fully seated in
retainers.
Bed lock
malfunctioning
2.
Isolate primary and secondary lock by
disconnecting one then the other from the main
brackets and then tilting the bed. Replace
defective lock as necessary.
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