PH-20/PHX-20 Manual
29
TROUBLESHOOTING
Heaters (cont’d)
PROBLEM
Primary heater does not heat and the display on the controller shows an error message
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SOLUTIONS
1. Check position 6 and 7 on the heater controller for loose wires.
If the wires are tight move to the next step.
2. Remove the heater cover and check that the thermocouple wires are secure to the
harness going up to the controller.
If there are no loose connections replace the heater thermocouple.
PROBLEM
Primary heater controller shows excessive temperature and the circuit has turned off.
CAUTION! The heater must be allowed to cool down before continuing.
SOLUTIONS
1. Set the controller set point at least 20 degrees lower than the temperature shown on
the controller. Briefly turn on the heater and look for the LED light on the solid state
relay to be on.
If the light is on replace the controller.
If the light is off replace the solid state relay.
PROBLEM
Primary heater Temperature drops excessively while spraying.
SOLUTIONS
1. Temperature of the chemical in the containers is too cold.
2. Exceeding the flow rate specification of the machine.
3. Disconnect power to the machine. One or more of the fire rods in the heater have
malfunctioned. Remove the heater cover and disconnect the wires to measure the
resistance across each rod. Installing a smaller mixing chamber in the gun may
allow you to spray until a new rod(s) is installed.
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