Filter
Top Products
WS-93002N page 7 of 7
TROUBLESHOOTING TIPS
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
Engine will not start.
Pointer burned in two.
False shutdown.
SWICHGAGE
®
contact closes
but does not trip the magnetic
switch to stop the engine.
Inaccurate readings.
Engine does not stop
immediately.
Magnetic Switch trips but
engine does not stop.
1. Blown fuse at magnetic switch.
2. Accidental ground to (S) or (C) terminals.
3. Overload circuit due to accessories.
4. Open circuit in 518PH wiring.
Overload of pointer contact due to exces
sive load or short circuit.
1. Wire from Swichgage instrument is
grounded or shorted to contact.
2. Closed Loop circuit has intermittent
open or short.
3. Excessive shock or vibration causes
magnetic switch to trip.
4. Lack of coolant around temperature sensing
bulb causes “hot spot”.
5. Temperature capillary routed too close to
exhaust manifold.
Incomplete circuit.
1. Pressure orifice plugged with thread sealant.
2. Temperature capillary rerouted too close to
exhaust manifold.
3. Broken or crushed temperature capillary.
Fuel shutoff valve used on diesel engine.
Feedback from alternator.
1. Replace fuse.
2. Check for ground and correct.
3. Re-route accessory circuits.
4. Repair circuit.
Remove or reduce load; remove short circuit and replace
Swichgage instrument.
1. Remove ground or short.
2. Check all wiring and repair.
3. Isolate panel from shock/vibration.
4. Check coolant level; loosen the union nut to allow trapped
air to escape.
5. Reroute temperature capillary.
Locate open circuit and repair; turn the contact adjustment
against the pointer causing them to “wipe” against each
other. Be sure magneto is providing power to primary
terminal post. CD type magnetic switch used with magneto.
1. Remove and clean pressure orifice.
2. Reroute capillary.
3. Replace Swichgage instrument.
Be sure all fittings are air tight; use check valve in bypass
line; use rack puller in place fuel valve.
Install diode in excitation circuit.
These instructions will assist in the correction of most problems which you may encounter with the panel. Before checking the list, first refer
to the wiring connections and operation procedures and make sure the panel is properly installed. If problems persist after making the
following checks, consult any Murphy facility.
Make sure the voltage and current requirements are within the W-Series ratings.
Determine the polarity for
the application. Use appropriate wire size for voltage and current.
Warranty
A limited warranty on materials and workmanship is given with this FW Murphy product.
A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our
specifications and designs at any time. MURPHY, the Murphy logo, and Swichgage
®
are registered and/or common
law trademarks of Murphy Industries, Inc. This document, including textual matter and illustrations, is copyright
protected by Murphy Industries, Inc., with all rights reserved. (c) 2006 Murphy Industries, Inc.
www.fwmurphy.com
918.317.4100 Email: sales@fwmurphy.com