Crafco EZ 500 Series II, Manual

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EZ 500 Series II Melter Part Manual
Chapter 8 Troubleshooting
©2019 by Crafco, Inc. All Rights Reserved………………...………………………………..……………...Troubleshooting 8-22
Step Possible Cause If . . .
3 Check for continuity in the hose from end to
end. Disconnect the three heating element
wires (blue) from the terminal block inside the
junction box and disconnect the five pin plug
between the hose and wand. Refer to
Fig.
8.10 Junction Box Wiring.
NOTE : Check each letter “D”, “E”, and “A”
with the three blue wires on the other end of
the hose. There should only be continuity on
one wire to each letter.
•
Yes, go to Step 3a.
•
No, either there was no continuity from one
letter to the other end of the hose or there
was more than one wire with continuity to a
letter. This hose needs to be repaired or
replaced. Contact Crafco, Inc. to send back
the hose for repair.
3a Check the RTD sensor in the hose against the
readout in the control box. Disconnect the
black and white wires from the terminal block
in the junction box and test for ohms.
Refer to Table 8-24 RTD Sensor Ohms vs.
Temperature.
•
Yes, the readout matches the table, go to
Step 4.
•
No, this hose needs to be repaired or
replaced. Contact Crafco, Inc. to send back
the hose for repair.
4 Check for continuity in the wand between “D”,
“E”, and “A”.
NOTE : Check between “D” and “E”, “D” and
“A”, and “A” and “E”.
•
Yes, go to Step 5.
•
No, this wand needs to be repaired or
replaced. Contact Crafco, Inc. to send back
the wand for repair.
5 Is there 12Vdc between wire labeled “BLU-
GEN” on the upper terminal block and nearby
ground source (black wire)?
•
Yes, check for loose or broken connections
between terminal block “BATT” terminal of
generator.
•
No, go to Step 6.
6 Is there 12Vdc between Hose PAKSTAT blue
wire terminal #4 and black wire terminal #8?
•
Yes, check for loose or broken wire between
terminal #4 and the terminal block.
•
No, go to Step 6a.
6a Is there 12Vdc between Hose PAKSTAT
terminal #3 Pink wire and terminal #8 black
wire?
•
Yes, replace hose PAKSTAT.
•
No, go to Step 6b.
6b Is there 12Vdc between Hose PAKSTAT pink
wire terminal #1 and black wire terminal #8?
•
Yes, check for loose or broken wires
between terminal #1 and terminal #3.
•
No, go to Step 7.
7 Is there 12Vdc between pink wire labeled
“PNK-1 on the upper terminal block and a
nearby ground source (black wire)?
•
Yes, check for loose or broken wire between
terminal block and terminal #1.
•
No go to Step 7a.
7a Is there 12Vdc between pink wire labeled
“PNK-4 and nearby ground source (black
wire)?
•
Yes, replace terminal block.
•
No, go to Step 8.
Table 8-21 Electrical Troubleshooting (continued)