To Troubleshoot Set Point Problems; Internal Diagnostics - Advanced Energy Paramount MF 2 kW User Manual

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Advanced Energy
1. Make sure that the inlet cooling water is flowing at the specified rate.
2. Make sure that inlet water temperature does not exceed specifications.
3. Make sure that the ambient air temperature around the Paramount MF 2 kW
generator during operation does not exceed the specified limit, 40ºC (104ºF).
4. Make sure air inlet and outlet vents have proper clearance, 1.27 cm (0.5") at the
right side and 10.16 cm (4") at the rear panel.
5. Check air inlet and outlet for debris.

To Troubleshoot Set Point Problems

When the POWER LIMIT LED is lit, the unit is unable to supply enough power to
match the set point due to limiting conditions. When an internal protection limit is
exceeded, the RF output is limited, but does not shut off. If this LED is lit along with
a high reflected power reading, it is most likely that the generator is protecting itself
in response to an external load condition.
1. Disable the output.
2. In the voltage control mode, make sure the cable from the connector Sense V-
In is connected to the output of the peak detector. Check the value of External
Volts on the Generator LEDs, front panel numeric display. If it is 2000 V, this
indicates a problem with the cable (open). If it is 0 V, the cable may have an
internal short.
3. Inspect and evaluate the unit's RF output connector, output cable, tuner, and
chamber. Look for signs of arcing and heat stress.
4. Make sure that RF cables are not shorted.
5. Verify cable continuity. Swap suspected cables or units with known good
cables or units.
Also, if unit is in pulsing mode with the shortest RF ON time and load has very high
Q, transients may last longer than the pulse length. In this case the power (or voltage)
control loop may not have enough time to adjust the power level and may not be able
to meet set point.

INTERNAL DIAGNOSTICS

Paramount MF 2 kW generator units have self-diagnostics that indicate unit
operational status. You can use these diagnostics to test a unit without removing it
from a production system. For example, the system stops and you need to check all
components to determine which of its components has a problem. You can quickly
determine your Paramount MF 2 kW generator unit's operational status.
You must change the unit's control mode to diagnostic before starting the diagnostic
test. After you start the self-diagnostic test, the unit performs these tasks:
57020114-00E Troubleshooting and Global Services
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Paramount MF 2 kW Generator
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