Note: If you do not have an Ohms meter, replace the heater cartridge after step three.
To replace the heater cartridge, turn the main power to the OFF position, unplug the power cord
and disconnect the air line.
Disconnect the heater cartridge wire at the connector. From underneath the inner frame, loosen
and remove the screws which holds the wire clamp and lower heater bar plate to the upper heater
bar plate (Fig. 4-23). Then remove the two remaining screws which hold the lower heater bar
plate to the upper heater bar plate. Remove the heater cartridge wires from the wire clamp.
Place a new cartridge into the heater bar slot and replace the lower heater bar plate. Place the
wires into the wire clamp and secure to the lower heater bar plate. Reconnect the heater
cartridge wires ensuring that the heater bar can extend fully without stretching the heater
cartridge wires. Plug the cord into the outlet, turn the power to the ON position and connect the
air line to the regulator. Press <START> on the Touch Screen and verify that the temperature
increases.
4.15 Replace Thermocouple Wire
A thermocouple wire, brazed to a ring terminal and secured to the top of the upper heater bar,
detects the amount of heat the heater bar is emitting. The thermocouple wire is considered a
normal wear item and will infrequently fail, requiring replacement.
To determine if the thermocouple is bad, follow these troubleshooting steps: 1) Locate the
"E13" light (Open Thermocouple Alarm) on the Interface Board (Fig. 4-9). If the light is ON,
proceed to step two. 2) Another indicator that the thermocouple wire is bad is the "XO" (Heater
Bar Temp. Readout) LED on the P.C. Board (Fig. 4-8) will flash slowly. 3) Additionally, the
"Y0" (Heater Circuit) LED (Fig. 4-8) will not be illuminated (unless the Energy Saver has shut
off the heater bar after 25 minutes).
If the above conditions are met, the thermocouple is bad and the current to the heater bar has
been turned OFF.
To replace the thermocouple wire, turn the main power to the OFF position, unplug the power
cord and disconnect the air line.
Remove the front plate and PTFE Anti-Stick assembly, as described in Chapter 4.13. Remove
the screws
which hold the ring terminal and the jacketed wire clamp. Disconnect the connector and remove
the wire. Reverse these steps to replace the wire.
CAUTION: To avoid stretching or breaking the wire during heater cylinder extension, ensure
that the wire is looped and free to bend during heater bar movement.
Replace the PTFE Anti-Stick assembly and front plate as described in Chapter 4.13.
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