PH/PHX-2 Manual
42
and see if the hose heat circuit is operating; if so replace the whip. To take a
continuity reading through the heated hose, one of the leads from the transformer
to the “A” or “R” heated hose must be disconnected.
If no voltage is coming out of the transformer to the heated hose move on to
the next step.
7. Open the right side of the tank (where the transformer is located) and locate the
solid state relay for the hose circuit (EL-35, Page 82). With the hose turned on and
the LED light illuminated on the relay, take a volt meter (set on DC) and measure
across position A1 and A2; your reading should be 24 volts. Then take an AC volts
measurement across position L1 and L2 (heavy wires). With the relay functioning
properly you should have a 1 volt Reading. If the Reading is 18 to 90 volts AC, the
relay has malfunctioned and needs to be replaced. If the AC Reading across L1
and L2 is .025 volts check the over temperature switches in the heaters. A
defective over temperature switch will open a contactor disabling both Heaters and
the Hose.
If there is no light on the solid state relay, move to the next step.
8. Using a DC volt meter, measure across position 5 and 6 on the back of the hose
controller. This is the output of the controller and sends power to the solid state
relay. Your reading will be 4-6 volts DC. If there is no voltage, check to make
sure that the set temperature of the controller is above ambient temperature.
Before replacing the controller, read across position 1 and 2 to make sure that the
controller is powered up; your reading will be 208 to 230 volts AC.
If there is no DC voltage to the relay, move to the next step.
PROBLEM______________________________________________________________
Hose does not heat and the display on the controller shows an error message (EEEE).
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 transformer cover and check that the thermocouple wires are secure
to the harness going up to the controller. If there are no loose connections,
disconnect 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 thermocouple. 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.
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