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Troubleshooting
CheckCheck
Check
RTDRTD
RTD
Check the continuity of the RTD to verify proper
resistance. If there is no continuity, the RTD has
failed and needs to be replaced.
1. Disable the applicator. See
Before Beginning Repair, page 20.
2. Check resistance of the RTD using a multi-meter
between the pins of the cordset connector. See
connectors illustrations in cordset pin tables.
CordsetCordset
Cordset
CheckCheck
Check
PinsPins
Pins
ResistanceResistance
Resistance
ValuesValues
Values
AtAt
At
RoomRoom
Room
TemperatureTemperature
Temperature
24W087,
24X039, or
24X760 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
3. Replace the RTD if the resistance reading is
outside the range, or if there is no continuity. See
Replace RTD, page 21.
CheckCheck
Check
ThermalThermal
Thermal
CutoffCutoff
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, page 20.
2. Remove cover plate.
3. Check for continuity using a multi-meter between
pin of cord set connector and the wire from the
thermal cutoff that connects to the heater lead.
CordsetCordset
Cordset
CheckCheck
Check
PinsPins
Pins
24W087, 24X039, or
24X760 Pt 100 (385)
RTD Cordset
A
24W088, 24X040, or
24X761 Ni 120 RTD
Cordset
1
334627D19