PMC MN-06001, Manual

Page: 29 / 66

PMCA-20
Manual
29
7. With a DC volt meter read across position A1 and A2 on the solid state relay
(smaller wires) if you have a reading of 4-6 volts DC replace the solid state relay.
If there is no DC voltage to the relay move to the next step.
8. Using a DC volt meter, measure across positions 9 and 10 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 reading, check to make
sure that the set temperature of the controller is above ambient temperature.
Before replacing the controller, measure across position 1 and 2 to make sure that
the controller is powered up. Your reading will be 208 to 230 volts AC.
If no voltage is present check for loose wires.
PROBLEM
Hose does not heat and the display on the controller shows an error message.
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.
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.