POLYURETHANE
MACHINERY
CORPORATION
PH-2 SERVICE MANUAL
12. TROUBLESHOOTING
coming out of the hose transformer.
If the controller still shows the error code, replace the hose thermo-
couple. If the error code goes away and temperature is now shown on
the display of the controller, then all the TSU harnesses from the TSU
to the transformer need to be checked for loose connectors or one or
more of the harnesses are defective.
• Problem: Heated hose controller shows excessive temperature.
Solutions:
1. Set the controller set point at least 20 degrees lower than the temperature shown
on the controller. Briefly turn on the hose 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: Hose will heat but does not come up to set temperature.
Solutions:
1. Check the tap setting on the transformer to ensure that the correct position has
been selected for the length of hose being used. Depending on the machines
incoming voltage, you may have to move the tap setting higher (up one).
CAUTION! Do not exceed the trip value of the transformer hose
breaker.
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 Propor-
tioner power supply ON.
• Problem: Hose does not heat and the display on the controller shows an error message.
Solutions:
1. Check position 9 and 10 on the heater controller for loose wires.
If the wires are tight, move to the next step.
2. Remove the transformer cover and check that the thermocouple wires are secure
to the harness going up to the controller. If there are no loose connections discon-
nect the wire from the TSU and connect it directly to the thermocouple harness
coming out of the hose transformer.
If the controller still shows the error code, replace the hose thermo-
couple.
If the error code goes away and temperature is now shown on the dis-
play of the controller, then all the TSU harnesses from the TSU to the
transformer need to be checked for loose connectors or one or more of
the harnesses are defective.
REVISION 1.2 44
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