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© 2014 Chromalox
®
, Inc.
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7
Troubleshooting
The following guidelines cover most of the common problems that could occur with the MaxPac. They are
not intended to be, nor can they be, absolutes to cover every possible failure.
Problem
No Power or unbalanced power to the load.
If Demand Light is “
Off”
1. Check incoming line power.
2. Check the instrument power.
3. Check the fuse on the main board.
4. Verify the input signal.
5. Check that remote shutdown J3 - 3 to 4 is open.
6. Check that the J2 - 2 to 3 is Jumpered.
7. Verify that heat sink is not in over temperature mode by removing temperature sensor
plugs from J10, J11, and J12.
If Demand Light is “
On”
1. Check the connections to SCR trigger board.
2. Check the power fuses (I
2
t).
3. Look for damage on the trigger board.