Maxwell VWC 4000 Series, Manual

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21
TROUBLESHOOTING
Problem Possible Cause Solution
Windlass does not rotate.
No electric power to controls.
Make sure the isolator switch for the
windlass controls is ON.
Check the fuse on power supply to
controls.
Make sure the wiring is correct and
check it for damage.
If there is more than one type of control
(pendant unit, footswitch, helm switch),
check them all in an effort to isolate the
problem
Check isolator switch and fuse on
Variable Frequency Motor Control, if
supplied.
Check the power supply to controls
from the source, step by step, and
identify the point where it stops.
Incorrect or incomplete wiring.
Check wiring against diagrams
supplied.
Damaged thermistors on the motor.
To confirm, check resistance across
thermistors, it should be between 50
and 500 ohms. When doing that, do
not use voltage.
Faulty thermistor relay
To confirm, check resistance between
terminals 21 and 22. If it is above 500
ohms, contact Maxwell.
No power supply to the windlass. Check power supply lines.
Check main isolator switch.
Check hydraulic pump.
Windlass is not able to pull
the specified load.
Motor voltage does not match the
power supply on board.
Check name plate on the motor. If
confirmed, contact Maxwell.
Hydraulic relief valve not set
correctly.
Check valve setting.
Electric motor stops after
prolonged heavy use.
The motor has been overloaded and
has reached its maximum operating
temperature.
Electric DC motors: Leave it to cool
down and reset the circuit breaker.
Electric AC motors: Leave it to cool
down and thermistor relay will reset
itself.
Windlass runs but the
chainwheel stays stationary.
The clutch is not fully engaged.
Tighten the clutch up, as described in
Section 3.2. If the problem persists,
contact Maxwell.
Band brake is engaged.
Release band brake.
Topworks key(s) (18) not installed.
Install the key.