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 8-30
NOTE: Use Fig. 8.11 Pump Circuit Schematic while troubleshooting the pump electrical system.
Step Possible Cause If . . .
1 Is the amber light “ON” on the Din Plug when
the trigger is actuated? For pump forward
din plug location Refer to
Fig. 8.7 Din Plug
Layout.
•
Yes, then the pump should be working. If it
is not working see Table 8-31 Pump
Hydraulic Troubleshooting.
•
No, go to Step 1a.
1a Unscrew the center screw of the din plug so
you can pull the din plug up 1/4” in order to
check voltage.
Is there 12Vdc from side post to side post?
•
Yes, the electrical system for the pump is
working properly. Refer to Table 8-31
Pump Hydraulic Troubleshooting.
•
No, go to Step 4.
2 Is there 12Vdc between red wire labeled
“TRIGGER RED” in junction box and nearby
ground source?
•
Yes, go to Step 2a.
•
No, go to Table 8-29 Pump Electrical
Troubleshooting (continued) Error!
Reference source not found. Step 10 for
an Electric Hose.
•
No, for a Standard Hose is normal because
thi i it i t d
2a Is there 12Vdc between green wire labeled
“TRIGGER GRN” in junction box and nearby
ground source?
NOTE: Wand trigger must be actuated
during this test.
•
Yes, go to Step 3.
•
No, see Table 8-23 Trigger is not Working.
3 Is there 12Vdc between green wire on
terminal #14 of pump relay and black wire
terminal #13 pump relay?
NOTE: Wand trigger must be actuated
during this test.
•
Yes, go to Step 5.
•
No, check for loose or broken wire between
relay and junction box.
4 Is there 12Vdc between the brown wire
located on the lower set of terminal blocks,
top right terminal and 5
th
terminal down on
the right blue ground wire?
NOTE : Wand Trigger must be actuated or
pump switch in “ON STANDARD” position
during this test.
•
Yes, replace Din Plug.
•
No, go to Step 4a.
4a Is there 12Vdc between the blue wire located
on the lower set of terminal blocks, top left
terminal and 5
th
terminal down on the left
black ground wire?
NOTE : Trigger must be actuated or pump
switch in “ON STANDARD” position during
this test.
•
Yes, replace terminal block.
•
No, go to Step 5.
Table 8-27 Pump Electrical Troubleshooting