PMC PH Series - Hose Heating Issues

PH-20/PHX-20 Manual
37
TROUBLESHOOTING
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
A- 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 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; 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. 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 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.