PMC PH-2 - Hose Heating Troubleshooting

PH/PHX-2 Manual
41
Hose Heating
WARNING! Before correcting any kind of defect, make sure the Main Power Switch is
OFF and incoming power is locked OFF. NEVER access the inside of the Control Panel
with the Proportioner power supply ON. The Heated Hose are components which reach
high temperatures; you must wait until they have cooled before handling.
Follow the recommended procedure in the indicated order to solve the problem and
avoid unnecessary repairs. Make sure all Switches are in the correct position and
Indicator Lights ON before determining the existence of a fault.
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 on/off 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 and reset the breaker. If it
continues to trip, 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 and reset the breaker. If it
continues to trip, 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 Amp Draw is less than the rated value, move on to the next step.
4. Check that the tap setting on the transformer is set for the proper hose length.
If it is set correctly move to the next step.
5. 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 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.
6. Because the gun whip takes the most abuse, it is most likely the whip that 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
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