Power Assist System Troubleshooting; Steering Wheel(S) "Lock Up" To One Or Both Directions - Dometic HC4645H Troubleshooting Manual

14
5 Power Assist system
troubleshooting
5.1 Steering wheel(s) "lock up" to
one or both directions
Causes
A. Mechanical interference.
B. Pro helm used with "unbalanced" cylinder.
C. Blockage or restriction in steering hoses between helm pump and
power assist pump.
D. Power Assist spool valve stuck or seized.
E. See advisory notice on page 27 for power assist pumps.
Solutions
A. Mechanical interference. See 4.2.
B. A Pro helm cannot be used with an unbalanced cylinder. See section 4.2.
C. Mark and remove hoses from power assist pump. Pump 1/2 bottle of
steering fluid through helm and out of the hoses. If the wheel locks up
to one side only inspect the hose on that side of the system.
Status light on power assist is ON, electric motor does NOT run.
Causes
A. Fuse at battery or in rear of power assist blown.
B. Blown breaker.
C. Incorrect wiring to/from battery.
D. Low battery voltage.
E. Faulty electronics.
Solutions
A. Check fuse located at battery as well as fuses installed behind the rear
cover of the power assist pump.
B. Check all breakers for proper working condition.
C. Check that all wiring is correct and in good working order (consult
installation and operating manual).
D. Confirm all batteries are in good working order.
E. Test power assist voltage. Refer to page 29.
NOTICE!
The on status light on the power assist is triggered by the ignition lead.
If the fuse at the battery or, the fuses in the rear of the power assist are
blown, the status light will still be turned on or may turn to red. See how
to test the power assist unit on page 29.
EN