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5. Look at the two lights located on the front of the transformer. If the voltage light is
lit and the AMP light is off the problem could in the heated hoses. If the voltage
light is on there is power to the primary side of the transformer. To check the
secondary side of the transformer you must take an AC volt reading across the
two leads coming out of the transformer that are connected to the “A” and “R”
hose leads. If you are reading voltage (your voltage reading will vary depending
on what tap setting is used) most likely the problem is in the heated hose. Either
a connector has come loose or there is a broken wire.
6. Remove one of the wires coming out of the transformer that is connected to
either the “A” or “R” side of the heated hose. Using an ohms meter perform a
continuity reading across the two lead wires coming off the machine end of the
heated hose. If there is no continuity through the hose check for loose or broken
connection between each section of hose. If all the connections are secure and
there are no visible broken wires it is possible that the element on the hose or the
lead wire has broken at its connection. Each hose must be checked individually
for continuity. Because the gun whip takes the most abuse it is most likely that
the problem is in the hose whip up at the gun end.
If no voltage is coming out of the transformer to the heated hose, move on
to the next step.
7. Open the console top and locate the solid state relay for the hose circuit (see
page 34), looking over the console top (front of machine) it is the relay to the
right. With the hose turned on and there is a LED light lit on the relay, take a volt
meter set on DC and measure across position A1 and A2 your reading should be
24 volts, then take an AC volts measurement across position L1 and L2 (heavy
wires). With the relay functioning properly you should have a 1 volt reading, if the
reading is 18 to 90 volts AC the relay has malfunctioned and needs to be
replaced. If the AC Reading across L1 and L2 is .025 volts check the over
temperature switches in the heaters. A defective over temperature switch will
open a contactor disabling both Heaters and the Hose.
If there is no light on the solid state relay, move to the next step.
8. Using a DC volt meter measure across position 5 and 6 on the back of the hose
controller, this is the output of the controller and sends power to the solid state
relay, your reading will be 4-6 volts DC. If there is no voltage check to make sure
that the set temperature of the controller is above ambient temperature. Before
replacing the controller read across position 1 and 2 to make sure that the
controller is powered up, your reading will be 208 to 230 volts AC.
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