POLYURETHANE
MACHINERY
CORPORATION
PH-2 SERVICE MANUAL
12. TROUBLESHOOTING
12.4 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 Propor-
tioner power supply ON. The Heated Hose are components which
reach high temperatures; you must wait until they have cooled be-
fore handling.
CAUTION! Excessive force opening or closing the Manual Valves
may result in damage to the Manual Valves and/or Coupling Block.
Hose Heating Problems
Heated Hose does not heat and the display on the controller shows ambient
temperature.
Page 42
Hose does not heat and the display on the controller shows an error message
(SbEr).
Page 43
Heated hose controller shows excessive temperature. Page 44
Hose will heat but does not come up to set temperature. Page 44
Hose does not heat and the display on the controller shows an error mes-
sage.
Page 44
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.
• 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.
REVISION 1.2 42
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