Kval 990-H, Service Manual

Page: 92 / 104

4.
With the power off, check for motor overloads by pressing each reset button (usu-
ally at the bottom of the panel) in SEQUENCE. If one is tripped there will be a
slight resistance to touch and a “click” sound as it is reset.
Trip Indicator
Press Reset
Thermal Overload Relay
Test
Troubleshooting Electrical Problems
KVAL 990-H Service Manual
4-20
Check for Tripped Circuits
1.
Remove lock and tag outs on the main power sources.
2.
Manually close disconnect sensors and energize the control circuit or transformer
with its respective sensor. Check the Status Light Panel,. If all lights are observed,
there are no overloads or emergency stops tripped.
Note:
Most electrical problems are related to mechanical malfunction (e.g., stuck
motors, jammed chain, blocked photo sensors etc.)
Note:
If a solenoid valve is suspected, and not cleared in the air checks section , it can
be electrically jumped to check operation.