Troubleshooting
18
334627K
Check RTD
Check the continuity of the RTD to verify proper
resistance. If here is no continuity, the RTD has failed
and needs to be replaced.
1.
Disable the applicator. See
Before Beginning
Repair
on page
2.
Check the resistance of the RTD using a multi-meter
between the pins of the cordset connector. See the
illustrations of the two types of connectors in
Table
1
and
Table 2
on page
3.
Replace the RTD if the resistance reading is outside
the range or if there is no continuity. See
Replace
RTD
Check Thermal Cutoff
If working properly, the cutoff will trip at 500° F (260° C)
and rest at 420° F (216° C). If failure is suspected, allow
the applicator to cool and then check the continuity of
the thermal cutoff to verify it has not failed. If there is no
continuity, the cutoff has failed and needs to be
replaced.
1.
Disable the applicator. See
Before Beginning
Repair
on page
.
2.
Remove the cover plate.
3.
Check for continuity using a multi-meter between
the pin of the cordset connector and the wire from
the thermal cutoff that connects to the heater lead.
See the illustrations of the two types of connectors
in
Table 1
and
Table 2
on page
Cordset
Check Pins
Resistance
Values at Room
Temperature
24W087,
24X039,
24X760, or
25E783 Pt
100 (385)
RTD
Cordset
D and E
107-115 Ohms
24W088,
24X040, or
24X761 Ni
120 RTD
Cordset
3 and 5
130-140 Ohms
Cordset
Check Pins
24W087, 24X039, or 24X760 Pt
100 (385) RTD Cordset
A
24W088, 24X040, or 24X761 Ni
120 RTD Cordset
1
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