PMC MN-06001, Manual

Page: 28 / 66

PMCA-20
Manual
28
Hose Heat
CAUTION! All electrical testing must be done by a qualified electrician.
PROBLEM
Heated hose does not heat and the display on the controller shows ambient temperature.
SOLUTIONS
1. Check that the light on the OFF/ON switch is lit when the heater is turned on, if not
replace the switch.
If the light is on move on to the next step.
2. Check the Hose Heat breaker in the main console. If the breaker continues to trip,
reset it and wrap an amp clamp around one of the wires coming off the breaker. If it
does not draw more than the rated value of the breaker, the breaker needs to be
replaced.
If the breaker is not tripped move on to the next step.
3. Check the circuit breaker mounted on the transformer. If the breaker continues to
trip, reset it and wrap an amp clamp around one of the wires from the transformer
going to the heated hose. If it does not draw more than the rated value of the
breaker, the breaker needs to be replaced.
If the breaker exceeds the rated value move on to the next step.
4. Check that the tap setting on the transformer in set for the proper hose length.
If it is set correctly move to the next step.
5. Using a voltmeter set on AC volts, and the hose circuit turned on, measure across
the two leads coming out of the transformer that are connected to the
“A” and “R”
hose. If you are reading voltage (your volt 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. Because the gun whip takes the most
abuse it is most likely that the whip has failed. Disconnect the crossover wires on
the machine end of the whip hose and connect the two wires together coming off
the 50’ section, turn on the hose heat and see if the hose heat circuit is operating, if
so replace the whip. To take a continuity reading through the heated hose one of
the leads from the transformer to the
“A” or “R” heated hose must be disconnected.
If no voltage is coming out of the transformer to the heated hose move on to
the next step.
6. Open the console top and locate the solid state relay for the hose circuit, 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 that is set on AC
volts and measure across position L1 and L2 (heavy wires). With the relay
functioning properly you should have a 1 volt reading, if you have a 208-230 volt
reading the relay has malfunctioned and needs to be replaced.
If there is no light on the solid state relay move to the next step.